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2 years ago

WILL GIVE 20 POINTS

Mathematics

1 answer:

Oksanka [162]2 years ago

3 0

Answer:

The answer is B

Step-by-step explanation:

75 + x = 90

First, Virginia had to write an equation to solve for x.

75 - 75 + x = 90 - 75

Second, Virginia used the subtraction property of equality to isolate x.

x = 15

Third, "x = 15" was the answer Virginia got after subtracting 90 and 75.

75 + 15 = 90

Finally, she had to verify her answer

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slope-intercept form

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2 years ago

Mason used a 30% coupon to buy a new computer. After the discount, the cost of the computer was $728.

horsena [70]

The original price of computer is $ 1040

<h3><u>Solution:</u></h3>

Given that, Mason used a 30% coupon to buy a new computer

After the discount, the cost of the computer was $728

To find: original price of computer

From given question,

price after discount = $ 728

discount = 30 % of original price

Let "x" be the original price of computer

price after discount = original price - discount price

$728 = x - 30 \% \text{ of } x$

Let us solve the above expression for "x"

$728 = x - \frac{30}{100}x\\\\728 = x(1 - \frac{30}{100})\\\\728 = x (1 - 0.3)\\\\728 = x (0.7)\\\\x = \frac{728}{0.7}\\\\x = 1040$

Thus original price of computer is $ 1040

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3 years ago