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3 years ago

Simplify 8 + 2(10 – r).

Mathematics

2 answers:

r-ruslan [8.4K]3 years ago

4 0

8+20-2r which is equal to 28-2r so it is (B)

balu736 [363]3 years ago

3 0

Hi!

8 + 2(10 - r) = 8 + 20 - 2r = 28 - 2r

The correct answer is B. 28 - 2r

Hope this helps!

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What is the value of x

Anna007 [38]

G. 90 is the answer...........

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3 years ago

Read 2 more answers

5/9(g + 18) = 1/6g +3

dangina [55]

For this case we have the following equation:

$\frac {5} {9} (g + 18) = \frac {1} {6} g + 3$

Applying distributive property on the left side of the equation we have:

$\frac {5} {9} g + \frac {5 * 18} {9} = \frac {1} {6} g + 3\\\frac {5} {9} g + \frac {90} {9} = \frac {1} {6} g + 3\\\frac {5} {9} g + 10 = \frac {1} {6} g + 3$

Subtracting $\frac {1} {6} g$ to both sides of the equation:

$\frac {5} {9} g- \frac {1} {6} + 10 = 3\\\frac {6 * 5-9 * 1} {9 * 6} g + 10 = 3\\\frac {30-9} {54} g + 10 = 3\\\frac {21} {54} g + 10 = 3\\\frac {7} {18} g + 10 = 3$

Subtracting 10 to both sides of the equation:

$\frac {7} {18} g = 3-10\\\frac {7} {18} g = -7$

Multiplying by 18 on both sides:

$7g = -7 * 18\\7g = -126$

Dividing between 7 on both sides:

$g = \frac {-126} {7}\\g = -18$

Thus, the value of g is -18.

ANswer:

$g = -18$

8 0

3 years ago

The sales tax on a surfboard is $12. What is the percent of sales tax?

Rudik [331]

X= sales tax %

Step 1:
$240 * sales tax %= $12
240 * x= 12
240x=12
Divide both sides by 240
x= 0.05 (decimal of the %)

Convert to %:
Multiply decimal by 100 (or move decimal to the right two decimal places
=0.05 x 100
=5 %

The sales tax is 5%.

Hope this helps! :)

8 0

4 years ago

In a sequence, each number after the first number is obtained by adding 4 to the previous number. If the first number in the seq

jonny [76]

The answer to this question is C

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3 years ago

One pipe can empty a tank in 45 minutes while a second pipe can empty it in 60 minutes. If both pipes are opened at the same tim

Ludmilka [50]

Answer:

It will take 25.7 minutes when they are working together

Step-by-step explanation:

Here, we want to know how long it will take both pipe working together to drain the tank

Let the volume of water to be drained be xL

for the first one, rate is

x/45 L/minutes

for the second x/60 L/minutes

Joint rate will be

x/45 + x/60 = 4x + 3x/180 = 7x/180

Now go get the time involved here, we simply divide the volume by the rate

That would be;

x divided by 7x/180

= x * 180/7x

= 180/7 = 25.7 minutes

8 0

3 years ago