3 years ago

The average of 4 numbers is 5. What is their sum? explain you answer

1 answer:

8 0

To find an average you add all numbers together then divide by the amount of numbers that you added. So if there are 4 numbers you would divide by 4. By going backwards you can find the answer. Multiply 5 by 4 and you get 20, which is the answer.

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Romashka [77]

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3 years ago

Find 54 is 90% of what number

aleksandrvk [35]

54=.9x Solve for x. x=54/.9=60

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2 years ago

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How to calculate the rise and run of a slope (4,-1) and (-2,3)

astra-53 [7]

$m = \frac{ y_{2} - y_{1} }{ x_{2} - x_{1} }$
$m = \frac{3 - (-1)}{-2 - 4}$
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3 years ago

Corn costs 99 cents per pound, and beans cost 45 cents per pound. If Shea buys 24 total pounds of corn and beans, and it costs $

viva [34]

Shea bought 13.5 pounds of corn

c = pounds of corn
b = pounds of beans

Here’s what we know:
c(0.99) + b(0.45) = 18.09
c + b = 24

Solve the second equation for c in terms of b

c = 24-b

Substitute that expression for c in our first equation to get a numerical solution for b:

0.99 (24-b) + 0.45b = 18.09
23.76 - 0.99b + 0.45b = 18.09
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b = 10.5

Substitute that value to get a numerical value for c:

c = 24 - b
c = 24 - 10.5
c = 13.5

Check the math:

0.99(13.5) + 0.45(10.5) =
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3 years ago

(Label each one)

shutvik [7]

1,3) no solution

2,4,5,6,7) solution

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3 years ago