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3 years ago

Evaluate the expression 2x + x, when x = -3. O A -12 O B-9 OC -3 ooo

Mathematics

1 answer:

svp [43]3 years ago

5 0

Answer:

Option B) -9 is correct

The evaluated given expression when x=-3 is 2x+x=-9

Step-by-step explanation:

Given expression is 2x+x

Now to evalute the given expression when x=-3 as below :

2x+x when x=-3

That is put x=-3 in the given expression we get

2x+x=2(-3)+(-3)

=-6-3

=-9 ( adding the like terms here )

Therefore 2x+x=-9

The evaluated given expression when x=-3 is 2x+x=-9

Option B) -9 is correct

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There was a party with 50 students. They had a cylinder root beer keg that was 17 inches in height and 13 inches in diameter. Th

Radda [10]

Answer:

Yes, there will be enough root beer for everyone to have at least one cup

Step-by-step explanation:

step 1

Find the volume of the cylinder root beer keg

The volume is equal to

$V=\pi r^{2} h$

we have

$r=13/2=6.5\ in$ -----> the radius is half the diameter

$h=17\ in$

substitute

$V=\pi (6.5)^{2} (17)$

$V=718.25\pi\ in^{3}$

step 2

Find the volume of the cylinder cups

The volume is equal to

$V=\pi r^{2} h$

we have

$r=3/2=1.5\ in$ -----> the radius is half the diameter

$h=4\frac{3}{4}\ in=4.75\ in$

substitute

$V=\pi (1.5)^{2} (4.75)$

$V=10.6875\pi\ in^{3}$

step 3

Multiply the volume of one cup by 50 (the total number of students) and then compare the result with the volume of the cylinder root beer keg

$10.6875\pi*(50)=534.375\pi\ in^{3}$

$534.375\pi\ in^{3}< 718.25\pi\ in^{3}$

therefore

There will be enough root beer for everyone to have at least one cup

4 0

3 years ago

Read 2 more answers

Please help with 5 and 6

Alika [10]

I believe for 5 it is 5^2 x 3 and for 6 it is 3^2 x 11.

5 0

3 years ago

What is the sum of the interior angles of the polygon?

Rudiy27

Answer:

180

Step-by-step explanation:

because im always right

8 0

3 years ago

Read 2 more answers

System of equations y >4, and y> |x-1|

Paul [167]

Y>(+)x+1
Y>4

Y>(+)x
Y>3

X=3

6 0

3 years ago

Four friends were born on consecutive years. The sum of their ages is 62. What is the age of the youngest friend?

Yuri [45]

<span>Four friends were born on consecutive years.
The sum of their ages is 62. Let's find the age of the youngest friend:
</span><span>Formula:
4x + 6 = 62
=> First is to Subtract 6 from both sides 4x = 56
Then next thing to do is to divide 4 from both sides:
=> x = 14 14 + 14 + 1 + 14 + 2 + 14 + 3 = 62
62 = 62
Thus the youngest age is 14</span>

7 0

3 years ago