Its A i had the same one. Hope it helps.
its 14n+21. 7×2n is 14n, and 3×7 is 21
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We are asked to find the slope of this graph; we are provided with two points:



- What we need in order to find the slope are two points and the slope formula.
Here's the formula:

Where
y2 and y1 are y-coordinates
x2 and x1 are x-coordinates
Substitute the values:

Simplify!

Simplify more!

Hope it helps you out! :D
Ask in comments if any queries arise.
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Answer:
The total number of students on the bus if there are 15 females and n males
Step-by-step explanation:
The total number usually means addition, as well as 15 females + n males would give you the total
Answer:
709.5
Step-by-step explanation:
660 + 7.5 x 660 : 100 = 709.5