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12/51
School X and School Y play each other in a competition.
School X has eight more points than School Y.
School X has three times as many points as School Y.
How many points does each school have?

Let school X has y points and school Y has x points, than

y=x+8

y=3x

left sides of equations are y, so

3x=x+8

2x=8

x=4

School Y has 4 points, so school X has

4+8=12 points or 4×3=12 points.

School X -- 12 points

School Y -- 4 points

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.