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denis-greek [22]
3 years ago
7

Which expression is equivalent to the expression below? 8(2r)+9r 8(2r)+9r

Mathematics
1 answer:
maria [59]3 years ago
5 0
Hopes this helps but is this a multiple choices questions or not:

Answer: 25r
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3 years ago
50x+30y= 550 what is x and y
melomori [17]

Answer:

<u>x = 8 and y = 5</u>

Step-by-step explanation:

The question is as following:

what is x and y for the following system of equations:

50x + 30 y = 550 ⇒ (1)

44x + 36 y = 532 ⇒ (2)

Subtract (1) - (2)

∴ 6x - 6y = 18

Divide both sides by 6

∴ x - y = 3

∴ x = 3 + y  ⇒ (3)

Substitute with the value of x at (1)

50(3+y) + 30y = 550

Solve for y

150 + 50y + 30y = 550

80y = 550 - 150 = 400

∴ y = 400/80 = 5

Substitute with the value of y at (3)

∴ x = 3 + y = 3 + 5 = 8

<u>So, x = 8 and y = 5</u>

8 0
3 years ago
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3 years ago
Your French fries have a food cost of $0.50, and you want to have a margin of 75% on the fries. What will the final selling pric
AleksandrR [38]

Answer:

\frac{0.5}{100} = \frac{x}{175}

0.5 represent the original 100% but we want to obtain a 75% aditional so we can find for the value x if interest and we got:

x= 175 *\frac{0.5}{100} =0.875

So we need to sell the fries ar 0.875$ if we want to obtain a 75% of margin

Step-by-step explanation:

For this case we know that the french fries cost $0.50 and we want to have a margin of 75% on the fries. So we can use the following proportional rule:

\frac{0.5}{100} = \frac{x}{175}

0.5 represent the original 100% but we want to obtain a 75% aditional so we can find for the value x if interest and we got:

x= 175 *\frac{0.5}{100} =0.875

So we need to sell the fries ar 0.875$ if we want to obtain a 75% of margin

4 0
3 years ago
Read 2 more answers
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