3 years ago

Explain how to do this plz

Mathematics

2 answers:

AVprozaik [17]3 years ago

8 0

The final answer is (7r^2 - 6) (7r + 6)

r-ruslan [8.4K]3 years ago

8 0

49r³+42r²-42r-36
=(49r³+42r²)+(-42r-36)
(7r+6)(7r²-6)
7r²-6

You might be interested in

Choose the two rectangular prisms that have a volume of 36cm^3?

oee [108]

Answer:

Correct choices: B, D

Step-by-step explanation:

The Volume of a Rectangular Prism

Given a rectangular prism of dimension W, L, and H, the volume is calculated as:

V = WLH

Each small cube of the figure has a volume of 1 cube centimeter. We need to calculate the volume of each solid and determine which ones have a volume of 36 cube cm.

A: V = 5*3*4 = 60 cube cm

B: V = 3*3*4 = 36 cube cm

C: V = 3*4*2 = 24 cube cm

D: V = 6*2*3 = 36 cube cm

E: V = 2*4*2 = 16 cube cm

Correct choices: B, D

8 0

2 years ago

The radius of a sphere is 6 units.

skad [1K]

Answer: Four-thirdsπ(6)³

Step-by-step explanation: The formula for the volume of a sphere is attached in the image down below.

Notice that two of the options listed have three-fourths but we use four-thirds to find the volume of a sphere. This means that we can eliminate the 1st and the 3rd option.

Now, we will multiply that by π and then by the radius cubed which is also written as 6³. This means that our answer would be the second option.