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Naya [18.7K]
3 years ago
13

Evaluate the expression using the given value of the variable. 4 – 2x + 5x when x = 4 16 –24 –18 28

Mathematics
1 answer:
Snowcat [4.5K]3 years ago
3 0

Answer:

A) 16

Step-by-step explanation:

The question is:

Evaluate the expression using the given value of the variable.

4-2x+5x  when x = 4

A) 16

B) -24

C) -18

D) 28

Solution:

Given expression:

4-2x +5x

Plugging in x = 4 in the expression

⇒ 4-2(4)+5(4)

⇒ 4-8+20

⇒ 16

So the expression evaluates to 16 when we put x = 4

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There are 18 female teachers and 5 male teachers at Ashley's school. What is the ratio of the number of female teachers to the n
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Answer:

The ratio of the number of female teachers to the number of male teachers is 18:5.

Step-by-step explanation:

First: Review how to write a ratio:

To write a ratio, take the two quantities, and put them on both sides of a colon (:). So, our two quantities our 18 and 5. But, they need to be in a specific order:

There are 18 female teachers and 5 male teachers at Ashley's school. What is the ratio of the number of female teachers to the number of male teachers?

Since, they mentioned the number of female teachers first, we put the quantity of female teachers first. So we will write 18 first and 5 after. So, the ratio is 18:5.

Thank you for reading

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2 years ago
A cone has a volume of 108 pi and a base diameter of 12. What is the height of the cone?
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Answer:

h  = 9 units of length

Step-by-step explanation:

Volume of a circular right cone is:

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Where h is the height of the cone, then

V(c)  =  (1/3) * π * r² * h

And  we have that  V(c) = 108*π

Then:

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We know diameter of the circular base is 12 units, according to that

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Therefore:

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