suppose you are conducting a survey regarding illicit drug use among teenagers in the baltimore school district. you obtain a cluster sample of 12 schools within the district and sample all sophomore students in the randomly selected schools. the survey is administered by the teachers.

Answer:

  21

Step-by-step explanation:

You want the value of the expression 2f(-3)-f(4), given that f(x) = 3x²-x+ 5.

A function is evaluated by putting the argument where the variable is, and simplifying the result. Polynomials are often easier to evaluate if they are written in Horner form.

  f(x) = 3x² -x +5

  f(x) = (3x -1)x +5

The values we need are ...

  f(-3) = (3(-3) -1)(-3) +5 = (-10)(-3) +5 = 35

  f(4) = (3(4) -1)(4) +5 = (11)(4) +5 = 49

Then the expression of interest has the value ...

  2f(-3) -f(4) = 2(35) -49 = 70 -49

  2f(-3) -f(4) = 21

Answer: 4==> D

Step-by-step explanation:

b=1

|2b-5|+1=

|2(1)-5|+1=

|2-5|+1=

|-3|+1=       ==> Absolute value equations are always positive: |-x|=x, not -x.

3+1=4==> D

Answer:

Step-by-step explanation:

D 4

1/2 is the likelihood of rolling an odd or even number in probability.

What is probability and how is it calculated?

The event "rolling an odd number" contains three outcomes. There are 6 equally likely outcomes in the sample space. Divide to find the probability of the event.

  P(E) = 3/9 = 1/2

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135,701.949 rounded to the hundredths is 135,701.95

Answer:

343.

Step-by-step explanation:

nice :)

The product of 3 and 7 is 21.

The product of two numbers is the result you get when you multiply the  numbers together.

Given are two numbers, 3 and 7.

When we multiply 3 to 7 we get 21,

Mathematically, it can be expressed as,

3x7 = 21

Hence, The product of 3 and 7 is 21.

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The major determinant of the permeability of a membrane to a specific ion is "the quantity of open ion channels that are specific to that ion."

Certain cells, known as excitable cells, are distinguished by their capacity to produce electrical signals.

Some key features regarding the open ion channels are-

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According  to the given data the slope mpq of the secant line pq  for the following values of x are :

The slope is defined as the proportion of both the vertical difference of two points, known as the rise, towards the horizontal change between those same two points, known as the run.

Calculate the values of two line points. Determine the difference in y-coordinates between these two locations (rise). Calculate the x-coordinate distinction between these two locations (run). Divide the x-coordinate variation (rise/run or slope) by the y-coordinate difference.

Slope(m) = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]

so,

m for x

3.333333 for 2.9

3.030303 for 2.99

3.003003 for 2.999

3.00030003 for 2.9999

2.727272 for 3.1

2.90297 for 3.01

2.997002 for 3.001

2.999700 for 3.0001

this shows that the  slope m for the required x.

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I understand that the question you are looking for is:

The point P(3, −3) lies on the curve y = 3/(2 − x).

If Q is the point (x, 3/(2 − x)), use your calculator to find the slope m PQ of the secant line PQ (correct to six decimal places) for the following values of x.

i. 2.9 =

ii 2.99 =

iii. 2.999 =

iv.2.9999 =

v. 731

vi. 3.01

vii. 3.001

viii. 3.0001

a. Using the results of part (a), guess the value of the slope m of the tangent line to the curve at P(3,-3)

b. Using the slope from part (b), find an equation of the tangent line to the curve at P(3,- 3).

Answer:

1/3 is a repeating decimal. 0.33333....

7/12 is a repeating decimal 0.5834....

1/5 is a terminating decimal 0.5

5/8 is a terminating decimal 0.625

2/9 is a repeating decimal 0.2222......

Step-by-step explanation:

Hope it helps! =D

Answer:

1/3 is a repeating decimal

7/12 is a repeating decimal

1/5 is a terminating decimal

5/8 is a terminating decimal

2/9 is a repeating decimal

Answer:

No solution

Step-by-step explanation:

You can solve this in a few ways. One way is to graph the equation, and the solution is the x-value of the point of intersection. Another way would be to factor, which is more difficult to complete with a square bigger than 2.

By graphing, you can see a parabola that never touches that x-axis, which means no solution.

Clyde and Mason are 432 mi apart from each other in distance.

We are given that:

Clyde and mason can each leave a rest area on the Florida turnpike.

Clyde travels north whereas Mason travels south.

After 4 hr., we get that Clyde has gone 248 mi and Mason, due to the heavy traffic he got , traveled only 184 mi.

We need to tell how far are they from each other.

We will do this by addition.

Distance = 248 mi + 184 mi

Distance = 432 mi.

Therefore, we get that, Clyde and Mason are 432 mi apart from each other in distance.

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The option that correctly ranks the three boys in order from lowest to highest average speed is:

The average speed calculated is obtained by dividing the total distance covered by the total time taken. That said, we will obtain the average speeds for each of the boys as follows:

Terri = 3.95 km/48 min

= 0.082 km/min

Aaron = 2.65 km/31 min

= 0.085 km/min

Jamal = 6.50 km/81 min

= 0.080 km/min

When the results are obtained from lovwest to highest we will have:

0.080, 0.082, 0.085 which represent the figures for Jamal, Terri, Aaron.

Complete Question:

Terri, Aaron, and Jamal all walked along straight paths. Terri walked 3.95 km north in 48 min. Aaron walked 2.65 km west in 31 min. Jamal walked 6.50 km south in 81 min. Which of the following correctly ranks the three boys in order from lowest to highest average speed?

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Answer: x=6

Step-by-step explanation: (x+54)+5x=90 -> 6x+54=90 -> 6x=36 -> x=6

you know it equals 90 because it's on a 180 and there's a right angle.

simplify the equation to 6x+54=90, subtract 54 from 90, and divide by 6 to isolate x.

Answer:

the side of a cube is 5 cm.

Total surface area of cube =6× (side)

2

=6×5×5

=150

∴ The total surface area of cube is 150 cm

2

Step-by-step explanation:

Sorry I I don't have much time to answer the rest

Answer: x has infinite number of solutions

Step-by-step explanation:

6−2(8−x)=2x−10

6-16-2(-x)=2x-10

-10+2x=2x-10

2x-10=2x-10 ==> x has infinite number of solutions

The domain of x will be a set of whole numbers greater than 2 which is; x  > 2

The range of y will be a set of rational numbers greater than or equal to 1.5 which is; y ≥ $1.5

The domain of a function is defined as the set of all possible input values that make the function possible while range is the set of all possible output values that are possible from the input values.

The function is; y = 0.5x

Since the value of x represents the number of people that purchased tickets for the rides including Neville, then we can say that the domain of x will be a set of whole numbers greater than 2 because we are told it is him and his friends which is plural. Thus;

The domain is; x > 2

The range will be;

y ≥ 3(0.5)

y ≥ $1.5

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The gas mileeage in miles per gallon is 44.69 miles per gallon

We'll begin by converting 19 Km/L to miles per litres. This can be obtained as follow:

1 Km/L = 0.621371 mile per litre

Therefore,

19 Km/L = (19 Km/L × 0.621371 mile per litre) / 1 Km/L

19 Km/L = 11.806 miles per lire

We can convert 11.806 miles per litre to miles per gallon as follow:

1 mile per litre = 3.78541178 miles per gallon

Therefore,

11.806 miles per litre = (11.806 miles per litre × 3.78541178 miles per gallon) / 1 mile per litre

11.806 miles per litre = 44.69 miles per gallon

Thus, the gas mileage is 44.69 miles per gallon

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Answer:

w=12

Step-by-step explanation:

3.6w=2(0.8w+12)

3.6w=2x0.8w+2x12

3.6w=1.6w+24

3.6w-1.6w=24

2w=24

w=12

HOPE THIS WILL HELP;)

The value of x from the given line segment is 5

A line is defined as the shortest distance between two points. From the given line segment, the addition below is true;

NM + ML = NL

Given

NM = 9

ML = 2x-7

NL = x + 7

Substitute to have:

9 + 2x - 7 = x + 7

2x + 2 = x + 7

2x-x = 7 - 2

x = 5

Hence the value of x from the given line segment is 5

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The digit 8 in Carla’s number represents 10 times of what the digit 8 represents in Travis’ number.

The number written by Carla = 814,247

The number written by Travis = 683,571

The place value of digits starting from left is ones, ten's, hundreds, thousands, ten thousand, hundred thousand and so on.

As per this sequence of values, we can see that digit 8 in Carla's number is at hundred thousand place value. Also, digit 8 in Travis' number is at ten thousand place value. So, representing these place value in numeral form and finding the number of times one is greater than other.  

Digit 8 in Carla's number: 100,000

Digit 8 in Travis' number: 10,000

Finding the answer -

Value = 100,000 ÷ 10,000

Cancelling common zeroes from numerator and denominator

Value = 10

Hence, digit 8 in Carla’s number represents 10 times of what the digit 8 represents in Travis’ number.

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The correct question is -

Carla wrote this number: 814,247

Travis wrote this number: 683, 571

The digit 8 in Carla’s number represents how many times what the digit 8 represents in Travis’ number?

A. 10

B. 100

C. 1000

D. 1/10

Answer:

crying -adjective. mending -noun. envying -verb.

Step-by-step explanation:

since an adjective is a word naming an attribute of a noun, the word cry is a noun and so the action being carried out "crying" is an adjective.

a noun is a word used in identifying a person, place or thing. and mending is a... you get the idea?

The product of the given expression 24.8 × 3.5 is 86.8. option D

Product refers to any operation or a result thereof which generalises multiplication of numbers, like the multiplicative operation in a ring, product of types or a categorical product.

This is also a quantity obtained by multiplication of two or more numbers.

The Multiplication symbol is represented by ( × )

For instance,

24.8 × 3.5

= 86.8

Therefore, the product of the given expression 24.8 × 3.5 is 86.8.

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Answer:

Step-by-step explanation:

200/250 =0.8

25.5x0.8 =20.4

answer=20.4

Answer:

Step-by-step explanation:

[tex]\lim\limits_{x \to 0} (1+x)^\frac{1}{x} =e\ (the\ second\ remarkable\ limit.)\\\\ \lim\limits_{x \to 0} (1+x)^\frac{1}{x} \approx2.718[/tex]

Answer: GoodMorning: )✨Ok so We should Know that The top number in a fraction is always considered a numerator, and that It shows the number of parts we have. The bottom number in a fraction is considered a denominator. It shows the total number of parts into which anything is divided. For example, in the fraction 8/7, 8 is the numerator and 7 is the denominator.

Step-by-step explanation:  Like In this fraction 7/3, 7 is the numerator and 3 is the denominator. In the fraction 9/7, 9 is the numerator and 7 is the denominator.The value placed above the horizontal line in a fraction is called a numerator. It signifies the number of parts taken out of the whole. The numeric value below the vinculum of a fraction is called the denominator. It represents the total number of equal parts as a whole. Hope this helps: )

Have A Nice Day: )

Answer:

A numerator is a value on the upper character set of a rational or fraction value and a denominator is the downer

[tex]{ \rm{fraction = \frac{numerator}{denominator} }} \\ [/tex]

For example;

Three quarters

[tex]{ \rm{ = \frac{3}{4} }} \\ [/tex]

3 is numerator and 4 is denominator

Mother spent (4r - 8) dollars more on cherries than did the father.

An expression using numbers and related operations is called a numerical expression.

According to the question, a pound of cherries costs $4.

Mom purchased r pounds.

The price of the cherry is calculated as follows: 4r = weight x $/lb.

Father purchased 2 pounds, thus the price of the cherries is 4 (2), or $8.

We remove the smaller value from the higher value, which is 4r - 8, where r must be more than two. Given that the mother spent more money on cherries than the father, the mother's cost of cherries is a greater value.

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Batting common is the the wide variety of runs scored via way of means of the batsman withinside the wide variety of fits performed via way of means of him in that supply weeks Walk to strike out is the wide variety of wickets taken via way of means of the sports activities character withinside the wide variety of fits performed via way of means of him in that week Home runs are the house run hit via way of means of that participant in that 5 weeks throughout which the sports activities creator cited these types of happenings

The number of hits A got is 186 hits.

​A player's batting average is calculated by dividing the number of hits by the number of at-bats.

Player A batting average =  0.312

Number of at-bats A did =  596

We have to find the number of hits A got.

0.312 = Number of hits / 596

Number of hits = 0.312 x 596

                        = 185.952 hits.

Rounding to a whole number we get,

= 186 hits

Thus, the number of hits A got is 186 hits.

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The values of the expression at the domain {-2, 3} are {-8, 4}

The expression is given as

2x^2 + 3x - 10

The domain of the function is given as

{-2, 3}

Rewrite the domain as

x = {-2, 3}

Next, we substitute these values of x in the expression 2x^2 + 3x - 10

So, we have

x = -2:⇒ 2(-2)^2 + 3(-2) - 10 = -8

x = 2:⇒ 2(2)^2 + 3(2) - 10 = 4

Hence, the values of the expression at the domain {-2, 3} are {-8, 4}

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