Please help me with this question

8.5

Step-by-step explanation:

ABCD is a rectangle meaning, AD = BC AND AB = DC. Since BC = PQ, we need to solve for PQ.

We know that QR = 10 cm, and the area of a rectangle is the length times the width. We know the area is 45 cm^2, so:

a = l * w

45 = 10 * PQ

PQ = 4.5

Since PQ = BC, then BC = 4.5. We know that the perimeter of the rectangle is 26 cm, we can solve for AB:

2(AB) + 2(BC) = 26

2(AB) + 2(4.5) = 26

2(AB) = 17

AB = 8.5

a 90 degree rotation across the the origin followed by a reflection across the x-axis.

step-by-step explanation: