If 15 people can empty the truck in 60 minutes, how long will it take 25 people to empty the same truck.

1 answer:

8 0

60 divide dos by 15 is 4, so it takes 4 minutes for each person to empty it.
25 x 4 = 100, so the answer would be 100 minutes.

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1-5x + 3y 45<br>2x+3y = 24

Norma-Jean [14]

Answer:

The answer is 1-5x+135y

Step-by-step explanation: multiply the numbers 3 and 45 which give you 135

3 0

3 years ago

(2x2 − 5x)(4x2 − 12x + 10)<br><br> multiply

frez [133]

Is this 2x to the power of 2?
if it is then this is easy
list it out (just to show you how its solved)
2x^2*4x^2
2x^2*(-12x)
2x^2*10
then list the other one
-5x*<span>4x2
</span>-5x*(-12x)
-5x*10
so the whole answer is
8x^4+(-24x^3)+(-20x^3)+20x^2+60x^2+(-50x)

7 0

4 years ago

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Explain how horizontal and vertical translations each affect the coordinates of the points of a figure?

Neporo4naja [7]

Translations of geometric figures in the coordinate plane can be determined by translating the x- and y-coordinates of points. Horizontal and vertical translations are the easiest. ... Solution: A horizontal translation just changes the x-coordinates of all points, so the rule is (x, y) à (x + 3, y).

6 0

3 years ago

Find the midpoint of AB if a (-1,7) and B (11,-1)

Nady [450]

Answer:

(5, 3)

Step-by-step explanation:

<h3>Given </h3>

Points A(-1,7) and B (11,-1)

Midpoint of AB

<h3>Solution</h3>

<u>Using midpoint formula</u>

x = (-1 + 11)/2 = 10/2 = 5
y = (7 -1)/2 = 6/2 = 3

Midpoint is (5, 3)

8 0

3 years ago

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You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con

Assoli18 [71]

Question:

You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 5 years of the actual mean with a confidence level of 97% , how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 18 years.

Answer:

61.03

Step-by-step explanation:

Given:

Standard deviation = 18

Sample estimate = 5

Confidence level = 97%

Required:

Find sample size, n.

First find the Z value. Using zscore table

Z-value at a confidence level of 97% = 2.17

To find the sample size, use the formula below: