3 years ago

Evaluate variable expressions

Mathematics

1 answer:

baherus [9]3 years ago

5 0

First multiply 5^2 =25+10•-2=25-20=5

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Select all the points that are on the graph of the line LaTeX: 2x + 4y = 202 x + 4 y = 20.

liraira [26]

Answer:

i need to see the graph

Step-by-step explanation:

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3 years ago

Cylinders A and B are similar. The volume of cylinder A is 20mm3. Calculate the volume of cylinder B.

MrRa [10]

The question is incomplete. The complete question is :

Cylinders A and B are similar. The length of the cylinder A is 4 mm and the length of cylinder B is 6 mm. The volume of cylinder A is 20mm3. Calculate the volume of cylinder B.

Answer:

67.5 $mm^3$

Step-by-step explanation:

Given that :

Cylinder A and cylinder B are similar.

Let volume of cylinder A = 20 $mm^3$

We know the volume of a cylinder is given by V = $\pi r^2 h$

where, r is the radius of the cylinder

h is the height of the cylinder

We have to find the scale factor.

The length scale factor is = $\frac{6}{4}$

$=\frac{3}{2}$

Area scale factor $=\left(\frac{3}{2}\right)^2$

$=\frac{9}{4}$

∴ Volume scale factor $=\left(\frac{3}{2}\right)^3$

$=\frac{27}{8}$

Therefore, the volume of cylinder B is $=20 \times \frac{27}{8}$

= 67.5 $mm^3$

5 0

3 years ago

81=n-3 (-5+4n<br> Equals what

lyudmila [28]

If 81=n-3(-5+4n)
81= n+15-12n
81= -11n+15
-11n=81-15
-11n=66
n=-6

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3 years ago

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Can someone help me out please

Tju [1.3M]

shoot, i don't know !!

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3 years ago

Keith receives $25000 salary for working as a account. If keith spends 40% of his salary on expenses each year, then how much mo

Scrat [10]

Answer:

$25000 * 40% = 100.000

Step-by-step explanation:

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3 years ago

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