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oksano4ka [1.4K]
3 years ago
12

PLEASE PLEASE HELP THANKS SO MUCH

Mathematics
2 answers:
yawa3891 [41]3 years ago
7 0

Answer:

a=12

b=9

Step-by-step explanation:

b=0.75a

a+b=21

a+0.75a=21

1.75a=21

a=12

a+b=21

12+b=21

b=9

ruslelena [56]3 years ago
5 0

Answer:

a= 12

b= 9

I hope this helps

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The relationship between the points is an illustration of similar shapes.

The length of AB is 0.43

The given parameters are:

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From the question (see attachment), we have the following observations:

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So, the equivalent ratio is:

\mathbf{AB:BE =AC:CD }

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\mathbf{AB:1.8 =AC:9 }

Express as fractions

\mathbf{\frac{AB}{1.8} =\frac{AC}{9} }

Multiply both sides by 1.8

\mathbf{AB =\frac{AC}{5} }

<em>AC = AB + BC</em>

So, we have:

\mathbf{AB =\frac{AB  + BC}{5} }

Substitute 1.7 for BC

\mathbf{AB =\frac{AB  + 1.7}{5} }

Multiply through by 5

\mathbf{5AB =AB  + 1.7}

Collect like terms

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Divide both sides by 4

\mathbf{AB=0.425}

Approximate

\mathbf{AB=0.43}

Hence, the length of AB is 0.43

Read more about similar shapes at:

brainly.com/question/20536565

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