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3 years ago

5

All members of our painting team paint at the same rate. If 8 members can paint a specific wall in 36 minutes, then long would i

t take 18 members to paint the same wall, in minutes?

1 answer:

dsp733 years ago

7 0

Answer:

81 minutes

Step-by-step explanation:

8. 18

__ x _____

36. x

36 x 18 = 648

648/8

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-2 3/4 ÷ -1/7= <br>help

Hitman42 [59]

The answer is 19 $\frac{1}{4}$

First you must set up the equation

$-2\frac{3}{4}$ ÷ $-\frac{1}{7}$

First, you must make the mixed number a improper fraction

$-\frac{11}{4}$ ÷ $-\frac{1}{7}$

Then you must divide

$\frac{77}{4}$

Finally, simplify

19 $\frac{1}{4}$

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3 years ago

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Step-by-step explanation:

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17. Solve the following:<br> x – 3y = 5<br> 5x – 2y = -1

Phantasy [73]

Answer:

(- 1, - 2 )

Step-by-step explanation:

Given the 2 equations

x - 3y = 5 → (1)

5x - 2y = - 1 → (2)

Rearrange (1) expressing x in terms of y by adding 3y to both sides

x = 5 + 3y → (3)

Substitute x = 5 + 3y in (2)

5(5 + 3y) - 2y = - 1 ← distribute left side

25 + 15y - 2y = - 1

25 + 13y = - 1 ( subtract 25 from both sides )

13y = - 26 ( divide both sides by 13 )

y = - 2

Substitute y = - 2 in (3) for corresponding value of x

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3 years ago

The are of a rectangle is 54 cm. The length is 2 cm more than a x and the width is 5 cm less than twice x. Solve for x. Round yo

romanna [79]

Given that:

(x+2)(2x-5)=54

We have:
$2x^2-x-64=0$

Using the quadratic formula, this is approximately 5.66, so rounded to the nearest whole number, our answer is 6.

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3 years ago

5 more than b divided by 2 is 5

gayaneshka [121]

We have an equation: (5+b)/2= 5
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⇒ 5+b= 10
⇒ b= 10-5
⇒ b= 5

Final answer: b=5~

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3 years ago