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2 years ago

Please help thanks! Brainliest

Mathematics

2 answers:

KatRina [158]2 years ago

4 0

9 x 9 = 81
81 - 21 = 60
60 / -6
10

daser333 [38]2 years ago

4 0

Answer:

-10

Step-by-step explanation:

$\frac{9^{2} -21}{-6} \\=-\frac{81-21}{6} \\=-\frac{60}{6} \\=-10$

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6 more than the product of a number x and 5 is 21

fgiga [73]

Answer:

x = 3

Step-by-step explanation:

6 + 5x = 21

5x = 15

x = 3

I hope this helps

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2 years ago

What is the slope of the line in the graph?

Viktor [21]

Answer:

The slope of the line in the graph is 1.

Step-by-step explanation:

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2 years ago

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WINSTONCH [101]

Answer:

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Step-by-step explanation:

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2 years ago

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2 years ago

Paul can install a 300 hundred square foot hardwood floor in 18 hours. Matt can install the same floor in 22 hours. How long wou

Vadim26 [7]

ANSWER

Paul and Matt will take
$9.9 \: \: hours$
to install the floor working together.

EXPLANATION

First, calculate Paul's rate, which is

$= \frac{1}{18}$

Next, calculate Matt's rate, which is,
$= \frac{1}{22}$

Let us assume that, Paul and Matt took
$x \: hours$
to do the work together.

Then, the rate of working together is,

$= \frac{1}{x}$

Now, add the individual rates and equate to the rate of working together to form an equation that will help us solve for x.

$\frac{1}{18} + \frac{1}{22} = \frac{1}{x}$

Simplify the left hand side

$\frac{11 + 9}{198} = \frac{1}{x}$

$\frac{20}{198} = \frac{1}{x}$

We reciprocate both sides to get (You could have also done cross multiplication).

$\frac{198}{20} = \frac{x}{1}$

$x = 9.9 \: hours$

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3 years ago