Two rectangles are shown below. rectangle p has a perimeter of 20 inches. rectangle q has a perimeter of 30 inches. what are the values of j and h?

The complete question in the attached figure

we know that
perimeter of a rectangle=2*[base+height]

rectangle  P
perimeter=20 in
perimeter=2*[j+4+h]
20=2j+2h+8------> 2j+2h=12----> j+h=6-----> j=6-h------> equation 1

rectangle Q
perimeter=30 in
perimeter=2*[j+1+3h]
30=2j+6h+2----> 2j+6h=28----> j+3h=14-------> equation 2

substitute equation 1 in equation 2
(6-h)+3h=14-----> 2h=8-----> h=4
j=6-h-----> j=6-4----> j=2

the answer is
j=2
h=4

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