are the ratios 1:4 and 3:5 equivalent
Answer:no
Step-by-step explanation:1:4 is not equivalent to 3:5
imagine the biology department needs to decide which lab curriculum yields better student outcomes. five sections are assigned to curriculum a, and five sections are assigned to curriculum b. all sections are administered a pre- and post-test that measures students’ attitudes toward science and knowledge of biology. the department wants to see if students’ gains are greater in one curriculum or the other. what statistical test should be done to determine if there is a significant difference? explain why you chose this test.
The statistical test that should be done to determine if there is a significant difference is the independent t-test.
What're is an independent t-test?
It should be noted the independent t-test or students t-test for two samples should be used.
The Independent Samples T-Test compares the means of two independent groups to determine whether there is statistical evidence that the associated population means are significantly different.
In this case, the biology department needs to decide which lab curriculum yields better student outcomes, the.t text can be applicable.
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Write √-45 in simplest radical form.
Answer: 3[tex]\sqrt4[/tex]
Step-by-step explanation:
Simplified radical form of the square root of 45
Square root of 45 can be expressed as, √45 = √(9 × 5) = 3√5. 45 is not a perfect square, so, it remains within roots. The simplified radical form of the square root of -45 is 3√5.
Answer:
3√5i
Step-by-step explanation:
[tex]\sqrt{-45}=\sqrt{-1}\sqrt{45}\\\sqrt{-1}\sqrt{45}\\i\sqrt{45}\\**Prime\:Factorization*\\3 \times 3 \times 5 = 45\\=3\sqrt{5}i[/tex]
➲ Hope this helps.
Devante will buy 3 packs of gum and four candy bars.gum is 21 cents a pack and candy bars are 45 cents each.how much will devante spend in dollars and cents?
Devante spent 2 dollars 43 cents
In this question,
A gum is 21 cents a pack and candy bars are 45 cents each.
Devante buy 3 packs of gum.
So for 3 packs of gum total amount would be,
3 × 21 = 63 cents
Devante buy 4 candy bars.
So for the four candy bars the total amount would be,
4 × 45 = 180 cents
Total purchase would be,
63 cents of packs of gum + 180 cents of candy bas
= 243 cents
We know that 1 dollar = 100 cents
S0, 243 cents = 2.43 dollars
Therefore, Devante spent 2 dollars 43 cents
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State the property that justifies the statement.
If m∠ 1=25 and m∠2=25 , then m∠1=m∠2.
The equality property that justifies the statement "If m∠ 1=25 and m∠2=25 , then m∠1=m∠2" is; Substitution Property
What is the property of equality used?The substitution property of equality states that 'If a variable C is equal to another variable D, then C can be substituted in place of D in any equation/expression and D can be substituted in place of C in any equation/expression.
Now, we are given the expressions;
If m∠ 1 = 25 and m∠2 = 25 , then m∠1 = m∠2.
Thus, we can also say that the property used here is called substitution property because the parameters were interchanged and still equal.
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3 is subtracted from three times a number
“a number” is x
Answer:
3x - 3
The answer above matches with the statement:
"Three is subtracted from three times a number."
Hope this helps :)
Makayla is taking a math course and is working with the perimeter of rectangles. She knows the perimeter and length of her rectangle but wants to solve for the width. Rearrange the following equation for W, where P is the perimeter, L is the length, and W is the width of the rectangle.
P = 2L + 2W
A(n) ____ turns a figure a certain number of degrees around a point.
Round 45.8 to the nearest whole number
Answer: 46
Step-by-step explanation: 8 is closer to 10, so 45.8 would round to 46
Which venn diagram represents x
Answer:
Step-by-step explanation:
A
Taylor makes $13 per hour at the grocery store. she always works between 10-15 hours per week to leave time for her homework and band practice. her gross wages can be modeled as w(h) = 13h, where h is the number of hours worked per week.
1. how much will her gross wages be if she works 12 hours this week?
2. what is the domain of this function?
3. what is the range of this function?
a) Her gross pay will be $156
b) The domain is D: [10, 15]
c) The range is R: [$130, $195]
What will be her gross wage if she works 12 hours this week?
We know that Taylor earns 13 dollars per hour on her job at the grocery store.
Then, if she works x hours in the week, her gross wage will be given by the linear equation:
g(x) = $13*x
So, if she works 12 hours, her gross pay will be:
g(12) = $13*12 = $156
what is the domain of this function?
we know that she works between 10 and 15 hours peer week, so the domain (set of the possible inputs of the function) is:
10 ≤ x ≤ 15 or [10, 15] in interval notation.
what is the range of this function?The range is the set of the outputs, the minimum of the rane is:
g(10) = $13*10 = $130
The maximum of the range is:
g(15) = $13*15 = $195
The range of the linear function is: [$130, $195]
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9. What is the slope of the graph of y= 12 x - 19?
12
Explanation:
Slope Intercept form is: y=mx+b
m would be the slope
So in y=12x-19, 12 would be the slope in this case.
NEED HELP IMMEDIATELY!
Simplify 10√2y + 5√2y + 3√2y.
A. 18√6y
B. 18√2y
C. 12√2y
D. 18√6y^3
(ANSWER IS NOT A)
18 root
2
Step-by-step explanation:
In this question imagine there is no y
It will be 10 root2 +5 root2 +3 root 2 it will be 18 root 2
A town's population is 42,975. About 125 people move out of the town each month. Each month, 150 people on average move into town. A nearby town has a population of 45,225. It has no one moving in and an average of 200 people moving away every month. In about how many months will the populations of the towns be equal? Write an equation to model the situation. Then solve the equation and answer the question.
It would take 10 months to equate the population of both the towns
Let the number of months required to equate the population of both the town( Town A and Town B) be x
This question can be solved using linear equations
So, town A's population would be current population adjusted with migration of people which is 42975-125x+150x
And town B's population would be current population adjusted with migration of people which is 45225 -200x
As at the end of x months the population of the two towns is equal, so equating both the linear equations
42975 -125x +150x = 45225-200x
Now solving the equation for x
150x-125x+200x= 45225-42975
225x=2250
Therefore x= 2250/225= 10
Hence it would take 10 months to equate the population of both the towns
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helpp me teacher said this is a quadratic formula 3x2+x+1
Answer: 0.434
Step-by-step explanation:
Answer:
3 (x + 16) 2 + 11 12
Step-by-step explanation:
brainliest please
q equals 4 l plus 2 k with l on the horizontal axis and k on the vertical axis, draw an isoquant. the slope of this isoquant equals
The slope of this isoquant equals -2.
What is an isoquant?A contour line formed across a set of locations where the same quantity of output is produced while changing the quantities of two or more inputs is called an isoquant (derived from quantity and the Greek word iso, meaning equal). A factor of production, like as labor, money, land, or organization, is typically represented by the x and y axes on an isoquant. Another name for an isoquant is a "Iso-Product Curve" or a "Equal Product Curve."
The isoquant mapping deals with the cost-minimization, profit, and output maximization problems of producers, whereas an indifference curve mapping helps consumers address the utility-maximizing problem. Indifference curves and isoquants diverge much more.
Calculations:
q=4L+2K
So, MPL=dq/dL =4
MPK=dq/dK =2
So,Slope=-MPL/MPK
=-4/2=-2
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A salesclerk is creating a display of 12 polo shirts and 48 team shirts. Only one type of shirt can be in each row. What is the maximum number of shirts in each row so that all the rows are equal in length? 12 4 3 2
The maximum number of shirts in each row so that all the rows are equal in length is 12.
How to illustrate the information?From the information, the salesclerk is creating a display of 12 polo shirts and 48 team shirts and only one type of shirt can be in each row.
It should be noted that the value van be found by knowing the highest common factor for the numbers.
The highest common factor for 12 and 48 is 12.
Therefore, the correct option is A.
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What is -33.44/-1.9 in division?
The division of the number -33.44/-1.9 is 17.6.
What is referred as division?Division is one of four fundamental mathematical operations, along with addition, subtraction, as well as multiplication.
Division is defined as the separating of a large group in to other smaller groups so that each group has an equal amount of items.Division is a process of repeated subtraction. It is the inverse operation of multiplication.It is characterized by the creation of equal groups. When we divide numbers, we break them down into smaller numbers so that the multiplication of the those smaller numbers equals the larger number taken.For the given expression;
= -33.44/-1.9
as, both numerator and denominator is negative values, both negative signs will be cancelled.
Now, divide numerator 33.44 by denominator by 1.9, we get 17.6.
Thus, the division of the number -33.44/-1.9 gives quotient 17.6.
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What does the symbol bc represent
Answer:
ray BC
Step-by-step explanation:
6. Select all the expressions that result in the same value as
40 + 120.
A. 4 (10
+30)
B. 2 (20 + 120)
C. 40 (1 + 3)
D. 40 (1 +30)
E. 10 (4+12)
Answer:
A, C, E
Step-by-step explanation:
40 + 120 = 160
Remember the correct order of operations, and do the operation inside parentheses first.
A. 4(10 + 30) = 4(40) = 160
B. 2(20 + 120) = 2(140) = 280
C. 40(1 + 3) = 40(4) = 160
D. 40(1 + 30) = 40(31) = 1240
E. 10(4 + 12) = 10(16) = 160
Answer: A, C, E
Which graph models function
The function g(x) models a downward facing parabola shape which is option A
The function g(x) have the solutions which are given in the form of coordinates
This can be solved on a sheet of graph using coordinate geometry
(-3,0), (-2,-4) , (-1, -6) , (0, -6 ), (1,-4),(2,0) and (3,6)
If we will plot all the given seven points given on the graph and join the points we would get a downward sloping parabola model which looks like reverse 'U' shaped whose highest point is between -1 and 0 that is -0.5
lies in second quadrant of the graph sheet.
Hence the given function g(x) models a parabola shape which is option A
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Oliver and his friends like to collect and trade cards from a certain combat card game. Oliver used his allowance to purchase 5 booster packs and 4 premade decks, which included a total of 178 cards. For his birthday, he received 4 booster packs and 7 premade decks, which included a total of 264 cards. How many cards come in every booster pack and every premade deck?
Solving system of equations in two variable gives that the number of cards in every booster pack are 10 and number of cards in every premade deck are 32
What is system of equations in two variables and how to find its solution by substitution?
Let x and y be two variables and
a₁x+b₁y =c₁
a₂x+b₂y =c₂
Where a₁, a₂, b₁, b₂, c₁, c₂ are constants then we can solve these simultaneous equations by substitution take value of x from equation (1) and then put it in (2) to get an equation for y only and then solve for y. put value of y in equation (1) to get value of x.
Let the number of cards in every booster pack are x and the number of cards in every premade deck be y
Number of cards in 5 booster packs will be 5x and Number of cards in 4 premade deck will be 4y
As Oliver purchases 5 booster packs and 4 premade decks, which included a total of 178 cards.
Thus we get 5x + 4y = 178 .....(1)
Number of cards in 4 booster packs will be 4x and Number of cards in 7 premade deck will be 7y
As Oliver received 4 booster packs and 7 premade decks, which included a total of 178 cards.
Thus we get 4x +7y = 264 ...(2)
System of equations to be solved is
5x + 4y = 178 .....(1)
4x +7y = 264 ...(2)
From (1) , we get x = [tex]\frac{178-4y}{5}[/tex]
Put this value in (2)
[tex]4(\frac{178-4y}{5}) +7y= 264\\\frac{712}{5} -\frac{16y}{5} +7y = 264\\\frac{712}{5}-264=\frac{16y}{5} -7y\\ y= 32\\x= \frac{178-4(32)}{5 }\\ x=50/5\\x=10[/tex]
Therefore x=10 and y= 32
The number of cards in every booster pack are 10 and number of cards in every premade deck are 32
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Rashon needed to get his computer fixed. He took it to the repair store. The technician at the store worked on the computer for 4.25 hours and charged him $141 for parts. The total was $332.25. Write and solve an equation which can be used to determine xx, the cost of the labor per hour.
Answer:
Step-by-step explanation:
The cost of labor per hour is $45.
The total cost of the parts is $141.The total time for which the technician worked is 4.25 hours.The total cost of repair is $332.25.Let the cost of labor per hour be "x".The total cost of labor is the product of the total time for which the technician worked and the cost of labor per hour.The cost of labor is 4.25*x.The total cost of repairing the computer is the sum of the cost of the parts and the cost of labor.The total cost of repairing the computer is $141 + 4.25*x.The equation is as follows:332.25 = 141 + 4.25*x191.25 = 4.25xx = 191.25/4.25x = 45Thus, the cost of labor per hour is $45.To learn more about equation, visit :
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What is the quotient of 81/(-9)/(-3)
Answer:
3
Step-by-step explanation:
81/(-9)/(-3)=3
The number 3 is prime number.
The sum of all proportions in a frequency distribution should be______.
the store has a speaker equipment listed for a price of $100 per set of speakers there is a sale, the current selling price is 89.99 how much money does the customer save ?
The amount of money saved by the customer is $10.01
If the selling price is greater than the cost price, then the difference between the selling price and cost price is called profit or the money saved.
If the selling price is less than the cost price, then the difference between the cost price and the selling price is called loss or the money loss.
Profit/ Loss= Cost Price(CP)- Selling Price(SP)
When CP> SP, then we can say there is a profit.
When CP<SP, then we can say there is a loss.
When CP=SP, then we can say neither there is a loss nor profit.
Given data, CP= $100
SP= $89.99
Profit/Loss= CP- SP
= $100- $89.99
= $10.01
As we can see our result is positive, so there is a profit.
Final answer: The amount of money saved by the customer is $10.01
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HELP I WILL GIVE BRAINLIEST!!!! M14. Select all the situations that could be represented by the expression 40. (-18).
A hot air balloon descends 18 inches per a second for 40 seconds.
A hot air balloon ascends 40 inches per a second for 18 seconds.
Trey withdraws $18 from his checking account once a week for 40 weeks.
Suzanne deposits $18 into her savings account once a week for 40 weeks.
Morty withdraws $40 from his checking account once a month for 18 months.
The statements that could be represents the expression 40×(-18) is
A hot air balloon descends 18 inches per a second for 40 secondsTrey withdraws $18 from his checking account once a week for 40 weeks.Morty withdraws $40 from his checking account once a month for 18 months.The expression= 40×(-18)
A hot air balloon descends 18 inches per a second for 40 seconds=40×(-18)
A hot air balloon ascends 40 inches per a second for 18 seconds=40×18
Trey withdraws $18 from his checking account once a week for 40 weeks=40×(-18)
Suzanne deposits $18 into her savings account once a week for 40 weeks=40×18
Morty withdraws $40 from his checking account once a month for 18 months=40×(-18)
Hence, The statements that could be represents the expression 40×(-18) is
A hot air balloon descends 18 inches per a second for 40 secondsTrey withdraws $18 from his checking account once a week for 40 weeks.Morty withdraws $40 from his checking account once a month for 18 months.Learn more about expression here
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A rectangular field is 15m longer than it is wide.
The area of the field is 800m²
Work out the length of the field.
Give your answer to 1 decimal place.
The length of rectangular field is 36.76 m.
What is a length?Distance is quantified by length. A quantity with the dimension of distance is called length in the International System of Quantities. Most measurement systems choose a length base unit from which all other units are derived. The fundamental unit for length in the International System of Units is the metre.
The term "length" refers to the measurement or size of something from end to end. In other terms, it is the greater of the upper two or third dimension of a geometric shape or object.
Area of rectangle is L × W = 800
given L = 15 + W
W × ( 15+ W) = 800
15W + [tex]W^{2}[/tex] = 800
[tex]W^{2}[/tex] + 15W - 800 = 0
by solving the above quadratic equation W= 21.76 m.
L = 15 + W
L = 36.76 m
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What is the standard notation for the following expression?
4.62 × 10⁻³
Answer:
Step-by-step explanation:
Calculate 10 to the power of −3 and get 1 over 1000
4.62(1/1000)
the answer is 231 over 50000 or 0.00462
Solve negative four and one third ÷ two and one fifth.
Answer: -2/15 according to the calculator.
Answer:
-1.9681
the 81 is repeating
Step-by-step explanation: