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konstantin123 [22]
3 years ago
7

Negative Exponents- All of the following expressions are equal except _____.

Mathematics
1 answer:
UNO [17]3 years ago
4 0

7 is not equal to the others

using the laws of exponents

7^{2} / 7^{3} = 1 / 7^{3-2} = \frac{1}{7}

7^{-1} = \frac{1}{7}

Apart from 7 the other 3 all equal \frac{1}{7}





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A company has to buy computers and printers. Each computer, x, costs $585 and each printer, y, costs $385. If the company spends
Luden [163]

The company bought 9 computers and 6 printers

<em><u>Solution:</u></em>

Let "x" be the number of computers bought

Let "y" be the number of printers bought

cost of 1 computer = $ 585

cost of 1 printer = $ 385

<em><u>The company buys a total of 15 machines</u></em>

Therefore, we can frame a equation as:

number of computers bought + number of printers bought = 15

x + y = 15 ------ eqn 1

<em><u>The company spends $7,575</u></em>

Therefore, we can frame a equation as:

number of computers bought x cost of 1 computer + number of printers bought x cost of 1 printer = 7575

x \times 585 + y \times 385 = 7575

585x + 385y = 7575 ------ eqn 1

<em><u>Let us solve eqn 1 and eqn 2</u></em>

From eqn 1,

x = 15 - y --------- eqn 3

<em><u>Substitute eqn 3 in eqn 2</u></em>

585(15 - y) + 385y = 7575

8775 - 585y + 385y = 7575

-200y = 7575 - 8775

-200y = -1200

y = 6

<em><u>Substitute y = 6 in eqn 3</u></em>

x = 15 - 6

x = 9

Thus the company bought 9 computers and 6 printers

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Find the missing angels in the parallelogram
krek1111 [17]

Answer:

m<B = 60°

m<C = 60°

m<F = 80°

m<G = 80°

Step-by-step explanation:

m<B = 180° - 120° = 60°

m<C = m<B = 60° (Vertically opposite angles are equal)

m<F = 180° - (40° + m<C(60°)) = 80°

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Question 10
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Answer:

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Step-by-step explanation:

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What's the change in temperature from 15 to -9<br><br>A:6<br><br>B: -6<br><br>C: 24<br><br>D: -24
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Hey there! Your answer us -24° And here you would use subtraction. Hope this helped!! Your fellow Brainly user, GalaxyGamingKitty.

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