3 years ago

What multiplication expression represents 7+7+7+7

Mathematics

2 answers:

Sergio [31]3 years ago

7 0

Answer:

7 x4

Step-by-step explanation:

vfiekz [6]3 years ago

5 0

Answer:

7*4

Step-by-step explanation:

7+7+7+7 = 7*4 = 28

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Answer:

A. 4

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Let the shorter leg=l feet

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Using Pythagoras Theorem

$Hyp^2=Opp^2+Adj^2\\(l+9)^2=l^2+(l+7)^2\\(l+9)(l+9)=l^2+(l+7)(l+7)\\l^2+9l+9l+81=l^2+l^2+7l+7l+49\\l^2+18l+81=2l^2+14l+49$

This results into:

$2l^2-l^2+14l-18l-81+49=0$

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