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4 years ago

Subtract 16a+3 from 13a−5 . Which is the correct answer?

Mathematics

2 answers:

Serga [27]4 years ago

8 0

3a add 5 because 16a-13a equals 3a

fenix001 [56]4 years ago

3 0

When you subtract it is multiplied with negative sign so the correct answer is
16a-8

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the height of a cylinder is three times the diameter of the base. the total surface area of the cylinder is 126pi ft^2. what is

julia-pushkina [17]

The easiest way to do this is to put the height in terms of radius. If diameter is 2 times the radius, then d = 2r. If the height is 3 times the diameter and diameter is twice the radius, then d = 2r, h = 3d, and 3d = 6r. Therefore, h = 6r by the transitive property of equality. Anyway...The formula for surface area of a cylinder is SA= 2 pi r^2 + 2 pi r h. Let's sub in what we know now, which is that SA = 126 and h = 6r: 126 pi = 2 pi r^2 + 2 pi r (6r). Simplifying that we get
126 pi = 2 pi r^2 + 12 pi r^2. Simplifying even further gives us
126 pi = 14 pi r^2. Divide both sides by 14 pi to get 9 = r^2. Now take the square root of both sides to get that r = +/- 3. But since we know that radius cannot be negative, the answer is that the radius is 3.

3 0

3 years ago

SAS<br> AA<br> SSS<br> NOT SIMILAR

PIT_PIT [208]

Answer:

Step-by-step explanation:

YJDYJDYFJFHJFJYFJFJYFLFJFJYYK

8 0

3 years ago

Factor the polynomial expression x4+18x2+81

AleksAgata [21]

Answer:

x^2, 3^2, 3, x^2 +9

Step-by-step explanation:

if not swy but i think its that

6 0

3 years ago

Read 2 more answers

What is the mean for 14,14,14,15,15,15,15,15,16,16,16,16,17,17,17,17,17,17,17,17,17,17,18,18,18,18,18,18,18,19,19,19,19,20,20,20

Oksanka [162]

Answer:

Mean: 19.366666666667

Step-by-step explanation:

Mean: Average of the Data set

If you add the numbers below and divide them by the amount of numbers there are, you will get the average of the data set.

14,14,14,15,15,15,15,15,16,16,16,16,17,17,17,17,17,17,17,17,17,17,18,18,18,18,18,18,18,19,19,19,19,20,20,20,20,20,21,21,21,21,22,22,22,23,23,23,23,23,24,24,24,24,24,24,25,25,25,25

Average= sum/count

Mean= 1162 / 60

Mean= 19.366666666667

Rounded to the nearest tenth: 19.4

Rounded to the nearest hundredth: 19.37

5 0

2 years ago

8. Divide 63.924 g by 20 g.

kiruha [24]

Answer:

Step-by-step explanation:

Dividing 63.934g by 20g

=3.1962

8 0

3 years ago