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4 years ago

Can someone help me with this question

Mathematics

2 answers:

NemiM [27]4 years ago

6 0

Answer:

360 inches or 30 feet

Step-by-step explanation:

A scale factor is the value which multiplied by a number scales the number larger or smaller. The blueprint has a wall height of 8 in. Using the scale factor 45, the actual height is 8*45 = 360 inches.

360 inches/ 12 inches is 30 feet.

trasher [3.6K]4 years ago

5 0

Answer:

30 ft

Step-by-step explanation:

Multiply the scale factor by the wall given.

45 X 8 in = 360 in

Convert inches into feet. (12 inches = 1 foot)

360/12 = 30 feet

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4 years ago

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3 years ago

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27^x −1 = 9^3x−7 what is X

tigry1 [53]

x is $\frac{11}{3}$

Step-by-step explanation:

Let us revise some rules of exponents

$(a^{n})(a^{n})=a^{m+n}$
$\frac{a^{m}}{a^{n}}=a^{m-n}$
$(a^{m})^{n}=a^{mn}$
$a^{m}=a^{n}$ , then m = n

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- Factorize 27 and 9

∵ 27 = 3 × 3 × 3

∴ 27 = 3³

∵ 9 = 3 × 3

∴ 9 = 3²

Substitute them in the equation

∴ $(3^{3})^{x-1}=(3^{2})^{3x-7}$

- Use the third rule to simplify each side

∴ $(3)^{3x-3}=(3)^{6x-14}$

- Use the fourth rule

∵ The bases of the two sides are equal

∴ Their exponents are equal

∴ 3x - 3 = 6x - 14

- Subtract 6x from both sides

∴ -3x - 3 = -14

- Add 3 to both sides

∴ -3x = -11

Divide both sides by -3

∴ x = $\frac{11}{3}$

x is $\frac{11}{3}$

Learn more:

You can learn more about equations in brainly.com/question/4934417

#LearnwithBrainly

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Step-by-step explanation:

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3 years ago

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LUCKY_DIMON [66]

The best answer would be C.

Hope this helps:)

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3 years ago