Solve the following system of equations using substitution, elimination, or elimination by multiplication
Answers
Answer: B
Step-by-step explanation:
Related Questions
Solve for x 6 = 2( x + 0)
Answers
Answer:
x = 3
Step-by-step explanation:
Answer: x = 3
Step-by-step explanation:
Find the solution of the system of equations -7x-3y=-20 3x+6y=-15
Answers
9514 1404 393
Answer:
(5, -5)
Step-by-step explanation:
I like a graphing calculator for quickly finding a solution to a system of equations. It shows the solution to be (5, -5).
__
We can add the second equation to 2 times the first to eliminate the y-variable.
2(-7x -3y) +(3x +6y) = 2(-20) +(-15)
-11x = -55 . . . . . collect terms
x = 5 . . . . . . . . . divide by -11
Substituting this value into the second equation, we have ...
3(5) +6y = -15
6y = -30 . . . . . . . . subtract 15
y = -5 . . . . . . . . . . divide by 6
The solution is (x, y) = (5, -5).
PLEASEEE HELP MEEEEE EASY 10 POINTSSS
Answers
Answer:
y = -3x + 3
Hope this helps, thank you !!
No more than 15 copies of a newspaper are left in the newspaper rack. Write an inequality to represent this situation.
Answers
Answer:
0≤x≤15
Step-by-step explanation:
Jo sold 132 mugs. One quarter of the mugs were small. The rest were large. How many small mugs did Jo sell? * 1 point
Answers
Answer:
33 small mugs
Step-by-step explanation:
Given:
Total number of mugs sold by Jo = 132
One quarter of the mugs were small. The rest were large.
To find: Number of small mugs sold by Jo
Solution:
Number of small mugs sold by Jo = [tex]\frac{1}{4}[/tex] (Total number of mugs sold by Jo)
Therefore,
Number of small mugs sold by Jo [tex]=\frac{1}{4}(132)=33[/tex]
please help asap!!!!!!!!!!!!
Answers
7853.98mm
Step-by-step explanation:
Circumference is pi times diameter so the diameter is 100 millimeters
Diameter is 2 times the radius so the radius is 50 millimeters
Area is pi times the radius squared so the area is about 7853.98 millimeters squared
Answer:
A = 795.77
Step-by-step explanation:
Using the formulas
A=πr2
C=2πr
Solving forA
A=C2
4π=1002
4·π≈795.77472
Middle school students were asked how they got to school each morning. There were 375 students who said they rode the bus. This number represents 60% of the school enrollment. How many students are enrolled?
Answers
Answer:
625 students
Step-by-step explanation:
The winning time for a race are shown in the table.
Which answer describes the average rate of change from year 2 to year 4?
A) the winning time increased by an average of 0.4 second per year from year 2 to year 4.
B) the winning increased by an average of 0.8 second per year from year 2 to year 4.
C) the winning time increased by an average of 0.475 second per year from year 2 to year 4.
D) the winning time increased by an average of 0.267 second per year from year 2 to year 4.
Answers
Answer:
The winning time increased by an average of 0.4 second per year from year 2 to year 4.
Step-by-step explanation:
I just took the quiz
The winning time for a race displayed in the table would be:
A). The winning time increased by an average of 0.4 seconds per year from year 2 to year 4.
Find the increase in winning time:Given that,
Year Winning Time(seconds)
1 27.5
2 28.4
3 28.7
4 29.2
5 29.44
The total change in the time = (0. + 0.3 + 0.5 + 0.24)/4
= 0.485 seconds
If we round off, it becomes 0.5 seconds.
Therefore, it can be considered that an average of 0.5 seconds changes every year from year 2 to 4.
Thus, option A is the correct answer.
Learn more about "Time" here:
brainly.com/question/26941752
The angle of a triangle are in the ratio 3:7:8. Find the angles.
Answers
Answer:
30°, 70°, 80°
Step-by-step explanation:
Let the measures of the angles be 3x, 7x and 8x.
Since, sum of the measures of all the three angles of a triangle is 180°.
Therefore,.
3x + 7x + 8x = 180°
18x = 180°
x = 180°/18
x = 10°
3x = 3*10° = 30°
7x = 7*10° = 70°
8x = 8*10° = 80°
Thus, the measures of the angles are 30°, 70°, 80°.
Combine like terms.
y +2+8(y + 8) =
Please i need this for now
Answers
Answer:
9y+66
Step-by-step explanation:
6) A circular window on a boat has a diameter of 24
inches. Approximately how much wall space does the
window take up?
A 38 in?
B 75 in?
C 113 in?
D452 in?
Answers
Answer:
452.448in² options D
Step-by-step explanation:
A circular window on a boat has a diameter of 24
inches. Approximately how much wall space does the
window take up?
A 38 in?
B 75 in?
C 113 in?
D452 in?
Given data
D=24 inches
Radius =d/2= 24/2= 12 inches
Area A
A=πr²
Substitute
A=3.142*12²
A=3.142*144
A=452.448in²
Write an equation of a line that passes through the point (1, 2) and is perpendicular to the line y=-1/4x+2
Answers
Answer:
y = 4x - 2 would be the equation
20 divided by c write an algebraic expression for the word expression
Answers
Step-by-step explanation:
The algebraic expression is
20
----
c
or
20/c
The radius of a circle is 3.5 m. Find the circumference to the nearest tenth.
Answers
Answer:
21.99 but you have to round it
Step-by-step explanation:
Answer:
22
Step-by-step explanation:
yes
please help again :,)) is it one solution, all solutions, or one
please show your work.
Answers
Answer:
Infinite many solutions
Step-by-step explanation:
If you graph it there is only 1 line
A quantity with an initial value of 6900 grows exponentially at a rate
of 40% every 8 hours. What is the value of the quantity after 2.75
days, to the nearest hundredth?
Answers
Answer:
Step-by-step explanation:
2.75 days * (24 hours)/day = 66 hours
6900(1.40)^(66/8) = 119,765.72
Answer:
110765.72
Step-by-step explanation:
Find x, y, and z. (Round to the nearest tenth if needed.)
12
у
X
N
Answers
Answer:
I'm sorry that your frog is dead, at least now we can fry his legs ~~tasting like chicken ~~~~~~flavor ain't missing
what’s 3-4/7 equal as a fraction?!
Answers
Answer:
17/7 or 2 3/7
Step-by-step explanation:
3 is the same as 21/7. Subtract 21/7-4/7 to get 17/7.
Hope it helps!
Hey there. Hope you're having a pleasant morning/evening and wherever else in between. The answer of 3-4/7, as far as I can remember, is -1/7.
PLZZZ HELP I WILL GIVE BRIANLY
What is the equation of the additive relationship represented by this table?
Enter your answer by filling in the box using an integer.
x y
9 5
12 8
Answers
Answer:
x-4=y
Step-by-step explanation:
9-4=5
12-4=8
Answer:
9,5
step-by-step explanation:
It took the football team 5 h to travel from Titletown, a total distance of 1320 km. Part of the trip was by bus and the remainder by plane. The bus averaged 40 km/h and the plane 600 km/h. How many hours were spent travelling by bus?
Answers
Answer:
It took 2 hours by plane
Step-by-step explanation:
let bus is represented by x and plane is represented by y
the total distance of bus and plane will be represented by equation:
40 x + 600 y = 1320 (1)
the total time taken by bus and plane will be represented by:
x + y = 5 (2)
solving equations (1) and (2) simultaneously:
Multiply by 40 on both sides in eq (2) and then subtract (1) and (2)
40 x + 600 y = 1320
40 x + 40 y = 200
_______________
560 y = 1120
y = 1120/ 56
y= 2
since plane is represented by y so, the time they spent travelling by plane is 2 hours.
Can somebody plz help solve each questions for what it equals correclty thanks so much :3
WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST !!:DD
Answers
26.) p = 42
27.) r = 24
28.) x = 45
Tell me what is the equation for equation 1 and 2
Answers
Answer:
2x+3y=12$
3x+2y=19$
Hope it helps
HELP PLZ there are no answer choices plz
Answers
if this is scale factor .. you have to divide the side by each other
10/4 = 2.5
20/8 = 2.5
which means 5 multiply by 2.5 equals 12.5
please help me someone with this problem
Answers
Sale! 60% OFF of the original price! Samuel wants to buy a model airplane. The original price is $40. How much will Samuel pay if he buys it during the sale?
Answers
Answer:
$16
Step-by-step explanation:
1-.6=.4
.4 x 40 = 16
Answer:
60% of 40.00 is 24
Step-by-step explanation:
I hope this helps! Have a wonderful day!
Erin is flying a kite. Originally, she holds the string in her hands, about 4 feet above the ground. She lets out 29 feet of string and estimates the height of the kite to be 24 feet above the ground. She then lets out another 60 feet of string. Approximately how high is the kite currently above the ground?
Answers are
65 feet
50 feet
84 feet
70 feet
Which is it
Answers
Answer:
84 maybe
Step-by-step explanation:
-7 2/3 + (5 1/2) + 8 3/4 = Need the answer asap
Answers
Answer:
answer is 7898tI don't know either thank very much for the points though
What is the solution to
-10 = 5(2x – 4)
Answers
-10=10x-20
+20 +20
10=10x
1=x
Answer:
3=x
Step-by-step explanation:
multiply 5 times 2x and 4 which is 10x-20
then you have -10=10x-20
then add 20 to both aides and you'll have
30=10x then divide by 10 to get x alone
and you have
3=x
A dance club had 160 members. There was a membership increase of 5%. How many new person's joined the club.
Answers
A whole number is written on a piece of paper.
You are given three clues to help you work out the number written on the piece
of paper.
Clue 1: Triple the number is between 18 and 33 inclusive.
Clue 2: The number is a prime number.
Clue 3: The number is not a factor of 99.
Use each of the clues above to refine your search.
Enter the list of numbers obtained after each clue to finally find the number
written on the piece of paper.
[3]
Answers
Answer:
1)6,7,8,9,10,11
2)7,11
3)7
The whole number is 7.
What is whole number?The group of natural numbers that includes the number 0 is known as whole numbers. The mathematical set of whole numbers is 0 through 9 and is represented by the letter W.
W = {0, 1, 2, 3, 4, …}
To better grasp whole numbers, consider the following information:
Whole numbers make up all natural numbers.There are only full numbers while counting.Zero and all positive integers are whole numbers.Real numbers are all entire numbers.Given:
Triple the number is between 18 and 33 inclusive.
Then the number can be
3x6 = 18
3 x 7= 21
3 x 8= 24
3 x 9= 27
3 x 10= 30
3 x 11=33
Numbers are 6, 7, 8, 9, 10, 11
2. Number is a prime number
The prime numbers are 7 and 11.
3. Number is not a factor of 99
The number is 7 because 11 is factor of 99.
Learn more about whole number here:
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