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3 years ago

12

Lisa drew a scale drawing of a house and its lot. She used the scale 1 inch : 3 feet. The backyard is 39 feet wide in real life.

How wide is the yard in the drawing?

1 answer:

jenyasd209 [6]3 years ago

6 0

Answer:

13 inches

Step-by-step explanation:

1 inch = 3 feet

39 / 3 = 13

1 x 13 = 13

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Multiply (2x+3) (-x -2)

Marysya12 [62]

Answer:

$-2x^{2} -7x-6$

Step-by-step explanation:

(2x + 3) (-x - 2)

distribute first term, to the second term:

2x(-x) + 2x(-2) + 3(-x) + 3(-2)

multiply:

$(-2x^{2})$ + (-4x) + (-3x) + (-6)

$-2x^{2} -4x-3x-6$

combine the like terms:

$-2x^{2}$ - 4x - 3x - 6

-7x

$-2x^{2}$ - 7x - 6

final answer :

$-2x^{2}$ - 7x - 6

hope this helped !!

mark me brainliest :D

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3 years ago

For what value of a does (1/9)^a+1 =81^a+1 x 27^2-a ?<br><br>-4<br>-2<br>2<br>6

EastWind [94]

Answer:

- 4

Step-by-step explanation:

Using the rule of exponents

• $a^{m}$ × $a^{n}$ ⇔ $a^{(m+n)}$

• $a^{-m}$ ⇔ $\frac{1}{a^{m} }$

$(\frac{1}{9}) ^{a+1}$ = $9^{-(a+1)}$ = $3^{-2(a+1)}$

and right side

= $3^{4(a+1)}$ × $3^{3(2-a)}$

Hence

$3^{-2a-2}$ = $3^{4a+4}$ × $3^{6-3a}$

$3^{-2a-2}$ = $3^{a+10}$

Equating exponents on both sides gives

a + 10 = - 2a - 2 ( add 2a to both sides )

3a + 10 = - 2 (subtract 10 from both sides )

3a = - 12 ( divide both sides by 3 )

a = - 4

4 0

4 years ago

Read 2 more answers

1. Six more than four times a number is eighteen.<br> What is the number?

saw5 [17]

Answer:

3

Step-by-step explanation:

1. Write out the equation

6 + 4x = 18

2. Subtract 6 from each side

4x = 12

3. Divide by 4 on each side

x = 3

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4 years ago

SOMEONE HELP ME WITH THIS

sweet [91]

Answer:2/8

Step-by-step explanation:

do top and bottom multiply

8 0

3 years ago

Help me please , will mark brainliest

Leokris [45]

3000? maybe good luck

6 0

3 years ago

Read 2 more answers