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2 years ago

Pls help ill give u brainliest!!!!!

Mathematics

1 answer:

lapo4ka [179]2 years ago

6 0

Answer:

The answer is B, S=20R+60.

Step-by-step explanation:

To check if the answer is true we can plug in the numbers. For the first line, it would be S = 20(20) + 60. 20 times 20 = 400, and 400 + 60 is 460. 460 is the number of seats in the row so the answer is true.

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-15= z/-2 answer please?

faust18 [17]

Answer:

Step-by-step explanation:

$-15=\frac{z}{-2}\\\\(-15)(-2)=z\\\\30=z$

4 0

3 years ago

If f(x) = 4x + k and f (2) = f (1), then calculate the value<br>of K.

andrezito [222]

Answer:

-7

Step-by-step explanation:

given f(x)=4x+k

therfore, f(2)=4*2+k

we know that f(2) =1

so, 4*2+k=1

8+k=1

k=1-8

k=-7

8 0

2 years ago

10. When a rubber ball is dropped from a height, h cm on to a flat concrete floor, it rebounds to 3 5 h cm a height of Given a r

Xelga [282]

Step-by-step explanation:

Let the height above which the ball is released be H

This problem can be tackled using geometric progression.

The nth term of a Geometric progression is given by the above, where n is the term index, a is the first term and the sum for such a progression up to the Nth term is

To find the total distance travel one has to sum over up to n=3. But there is little subtle point here. For the first bounce ( n=1 ), the ball has only travel H and not 2H. For subsequent bounces ( n=2,3,4,5...... ), the distance travel is 2×(3/4)n×H

a=2H..........r=3/4

However we have to subtract H because up to the first bounce, the ball only travel H instead of 2H

Therefore the total distance travel up to the Nth bounce is

For N=3 one obtains

D=3.625H

7 0

2 years ago

20 + 8(q - 11) = -12

Simora [160]

Step-by-step explanation:

try to impose the process of elimination and see if that helps

3 0

3 years ago

2.3,2 4/5, 2.6 from least to greatest

Alex777 [14]

Hello there!

Least to greatest of these problem

For the fractions you can simplify it make it easier for you to solve these types of problems

Anyhow!

Let's find our answer, shall we?

$2.3 = 2.3 \\ \\ 2\frac{4}{5} = \frac{14}{5} = 2.8 \\ \\ 2.6 = 2.6$

Our answer: $2.3 \\ 2.6 \\ 2\frac{4}{5}$

4 0

3 years ago