Brandon's class has 7 boys and 13 girls. explain how do the ratios 7:13 and 7:20 describe Brandon's class?

Mathematics

1 answer:

Rudik [331]3 years ago

8 0

7:13 is comparing boys to girls. 7:20 is comparing boys to the whole class, since 7 boys + 13 girls = 20 students.

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Let
x-------> the width of the rectangular area
y------> the length of the rectangular area

we know that
y=x+15------> equation 1
perimeter of a rectangle=2*[x+y]
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substitute 1 in 2
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y=x+15
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the length of the rectangular area is at most 45 ft

see the attached figure
the solution is the shaded area