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Otrada [13]
3 years ago
14

Brad says that if a second number is 125% of the first number, then the first number must be 75% of the second number. Is he cor

rect?
Mathematics
1 answer:
olga55 [171]3 years ago
8 0

Answer: He is not correct.

Steps:

Let x1 and x2 be the first and second number, respectively.

x_2 = \frac{5}{4}x_1\\\frac{4}{5}x_2 =x_1

In words, if the second is 125%, or 5/4 of the first number (first equation),

then the first is 4/5 of the second, which is 0.8 or 80%.

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As you can see, both equations are set to equal y. This means the right sides of each equation are equal, since y is isolated in both equations. So to solve this particular system of equations for x, set the right sides of both equations equal to each other. After you've done that, you can proceed to solve the equation algebraically for the variable, x.

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y = x - 1
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Answer:
(-2, -3)
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Answer:

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Step-by-step explanation:

have a great day

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