Select all equations that are true.

It would be A and C

Step-by-step explanation:

For A, you could see it as 3/4 minus 2/4, which equals 1/4

For C, again, could see it as 7/8 minus 6/8, which equals 1/8.

The rest would be wrong.

15.5

step-by-step explanation:

5

∑

n = 1

substitute n = 1, 2, 3, 4, 5 and sum the terms

= + + + 2² + 2³

= 0.5 + 1 + 2 + 4 + 8

= 15.5

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation: