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3 years ago

Can someone help me on number one plz. Help me by explaining the steps ;D

Mathematics

2 answers:

SVETLANKA909090 [29]3 years ago

5 0

It's easy since all the variables have a after them they can be added and subtracted together.

15a-9a=6a
6a+20a=26a
26a-12a=14a
The simplest form is 14a <span />

harina [27]3 years ago

3 0

0+1=1
1-0=1
1x1=1
1/1=1
1 is in everything if this didnt help tell me

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Convert 10 1/2 to fractional notation

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svetoff [14.1K]

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Option a) f(x)=x^2

Step-by-step explanation:

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3 years ago

You are running a fuel economy study. One of the cars you find is blue. It can travel 43 1/2 on 1 1/4 gallons of gasoline. Anoth

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3 years ago

Find the volume of a pyramid with a square base, where the perimeter of the base is 8.2\text{ cm}8.2 cm and the height of the py

7nadin3 [17]

Answer:

$V=18.2cm^3$

Step-by-step explanation:

The volume of the pyramid is given by:

$V=\frac{A_{b}h}{3}$

where $A_{b}$ is the area of the base and $h$ is the height.

We know that the height is:

$h=13cm$

Thus we need to find the area of the square at the base.

The perimeter of the square is:

$p=8.2cm$

this means that the length of the sides of the square is :

$l=\frac{p}{4}\\ \\l=\frac{8.2cm}{4}\\ \\l=2.05cm$

Now we can find the area of the base which the area of the square:

$A_{b}=l^2\\A_b=(2.05cm)^2\\A_b=4.2025cm^2$

and finally we find the volume:

$V=\frac{A_{b}h}{3}$

$V=\frac{(4.2025cm^2)(13cm)}{3}\\ \\V=\frac{54.6325cm^3}{3}\\ \\V=18.2108cm^3$

Which rounded to the nearest tenth of a cubic centimeter is: $V=18.2cm^3$

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3 years ago