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MakcuM [25]
3 years ago
11

If 28% of a sum is $100.80, what is the sum?

Mathematics
1 answer:
lbvjy [14]3 years ago
7 0
Call the sum S. Then, you can use the definition of percentage to obtain an equation to find the value of S: 1) 28% = 28 / 100; 2) 28% of x = (28/100)x; 3) that is equal to $100.80 => (28/100)x = 100.8 => x = 100.8 * 100 / 28 => x = 360. You can verify that the 28% of 360 is 100.80: 360 * 28/100 = 100.80. <span>Then, the answer is $360.</span>
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Who ever answers first get 100 points
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Answer:

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Step-by-step explanation:

4 0
3 years ago
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A horse weight is 700lb and needs medication that is 10mg per 100kg what is the horses weight in kg?
wel

Answer:

315 kg

Step-by-step explanation:

to find the weight of the horse:

1lb = 0.45 kg (rounded the .45)

(700lb) x (0.45)= 315

to find how much medicine they need:

315/10= 31.5

the horse wieghs 315kg meaning that they would need 31.5mg of medication.

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3 years ago
PLEASE HELP 15 POINTS WILL GIVE BRAINLIEST The following formula, F = ma, relates three quantities: Force (F), mass (m), and acc
8_murik_8 [283]
Part A

The expression "ma" is the same as "m*a" (m times a). To isolate 'a', we divide both sides by m. Division is the inverse operation of multiplication. Think of it as undoing multiplication

F = ma
F = m*a
F/m = m*a/m
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a = F/m

Answer: a = F/m
Note: the slash "/" without quotes means "divide"

===========================================
Part B

Use the result from part A. We will plug F = -24 and m = 10 into that equation

a = F/m
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Answer: -2.4

===========================================
Part C

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4 0
3 years ago
Four friends charge different amounts for babysitting.<br><br> Who charges the most per hour?
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We need the rates please attach a picture
8 0
2 years ago
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25 POINTS AND BRAINLIEST
kondor19780726 [428]

Answer:

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Step-by-step explanation:

Irina can paint 1/9 of a room in 1 hour since she can paint a room in 9 hours. 1/9x, where x is the number of hours she works and 1/9 of a room per hour is her speed, would be her part of the calculation.

Paulo can paint 1/8 of a room in 1 hour since he can paint an entire room in 8 hours. 1/8x, where x is the number of hours he works and 1/8 of a room per hour is his speed, would be his part of the equation.

1/9x + 1/8x = 1 (Irina's portion of the room plus Paulo's portion of the room equals one complete room) would be the equation.

Look for a denominator that has the same value as the numerator. Both 9 and 8 split evenly into 72 as the initial number. We multiply the top of 1/9 by 8 to convert the fraction and get 8/72x because 9*8 = 72. We multiply the top of 1/8 by 9 to convert the fraction and get 9/72x because 8*9 = 72. We have 8/72x+9/72x=1 currently.

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∴ x=72/17= 4.24

8 0
2 years ago
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