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2 years ago

5. (9r 3 + 5r 2 + 11r) + (-2r 3 + 9r - 8r 2)

Mathematics

1 answer:

ad-work [718]2 years ago

3 0

Answer:

7r³ - 3r² + 20r

Step-by-step explanation:

(9r³ + 5r² + 11r) + (-2r³ + 9r - 8r²)

You can get rid of the parentheses since there is nothing to distribute.

9r³ + 5r² + 11r - 2r³ + 9r - 8r²

Combine like factors.

7r³ - 3r² + 20r

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3 to the 2 power times 5 to the 3 times 8 divided by 3 times 5 to the 3 times 8

IceJOKER [234]

Answer:

Step-by-step explanation:

First condense all the numbers with exponents:

3² x 5³x 8 divided by 3 x 5³ x 8

27 x 125 x 8 divided by 3 x 27 x 8

Then multiply 27 , 125 ,and 8

27 x 125 x 8 =27000

Then multiply 3, 27 ,and 8

3 x 27 x 8 = 648

Then divide 27000 by 648

27000 / 648 = 41.6666666667

Which rounds to about: 42

3 0

3 years ago

Find the slope (or grade) of the treadmill shown. <br><br> The grade of the treadmill is___%

prisoha [69]

Answer:

grade=15%

Step-by-step explanation:

For 2 ft on x-axis it has elevated 0.3 ft on y-axis

m=0.3/2=0.15 ft

grade=m x 100

grade=15%

6 0

3 years ago

Need help asap!!!!!!!!!!!

salantis [7]

Answer:

the answer should be d for tour answer

3 0

3 years ago

Help!!<br> I can't solve it

Rudiy27

Trick Question their is No 1

7 0

3 years ago

What is the value of f(7.5) when f(x)=2x+7

Ivan

Hey there!!

Given :

$f ( x ) = 2x + 7$

Find f ( 7.5 )

Now, we will need to substitute the value of 7.5 in place of x

$f(7.5) = 2(7.5) + 7$

$f(7.5) = 15 + 7$

$f(7.5) = 22$

Hope my answer helps!

6 0

2 years ago