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4 years ago

Write the inverse of g(x)=x²-7

Mathematics

1 answer:

sesenic [268]4 years ago

8 0

Answer:

$\± \sqrt{x + 7}$

Step-by-step explanation:

y = x² - 7

Add 7 to both sides.

y + 7 = x²

Take square root on both sides.

±√(y + 7) = x

Switch variables.

±√(x + 7) = y

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This year, a company produced 8 percent more items than last year. If the company produced 243 items this year, how many items d

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Answer:

Last year company produce 225 items

Step-by-step explanation:

let the number of items produced last year be x

Here we are asked to find the percent increase in the production of the items from last year

The production for the last year = x

The production for the current year = 243

Total increased production =243-x

Hence percentage calculation = $\frac{\increase \in \sale}{\last \year \sale} \times 100$ %

Increased percentage = $\frac{243-x}{x} \times 100$ %

Percentage increased = 8 %

Hence

$\frac{243-x}{x} \times 100 = 8$

${243-x}\times 100 = 8 \times x$

$24300-100x = 8x$

$24300=100x+8x$

$24300=108x$

$x= \frac{24300}{108}$

x=225

Hence Last year production was 225 items

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3 years ago

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