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3 years ago

Simplify the expression by combining like terms. 15+12x−5x+4y−7

Mathematics

2 answers:

olchik [2.2K]3 years ago

5 0

Combine 12x and -5x which gives you 7x

Combine 15 and -7 which gives you 8

And you leave 4y alone

Your answer

7x+8+4y

Makovka662 [10]3 years ago

4 0

15+12x−5x+4y−7

12 -5x +4y +15-7

7x+4y +8

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Step-by-step explanation:

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PIT_PIT [208]

In the smaller triangle, let $y$ be the length of the smallest leg. Then the smallest leg in the larger triangle is $14-y$ .

Within the scope of the smaller triangle, we have $y$ such that

$x^2+y^2=13^2\implies y=\sqrt{13^2-x^2}$

Then within the larger the triangle, we would have

$x^2+(14-y)^2=15^2\iff x^2+\left(14-\sqrt{13^2-x^2}\right)^2=15^2$

Now we can solve for $x$ :

$x^2+14^2-28\sqrt{13^2-x^2}+(13^2-x^2)=15^2$

$\implies x=12$

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3 years ago

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Minchanka [31]

Answer:

Look below

Step-by-step explanation:

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