3 years ago

PLEASE HELP IT'S DUE IN 15 MINUTES!! WILL GIVE BRAINLIEST!!!!

Mathematics

1 answer:

Anna71 [15]3 years ago

6 0

The answer would be 3x+2=10x-5

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The base of a triangle is nine centimeters longer than the perpendicular height. If the area of the triangle is 180 square centi

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Answer:

Step-by-step explanation:

<u>Equations</u>

Let's call

b= base of the triangle

h=height of the triangle

The base is 9 cm longer than the height, thus:

b = h + 9

The area of the triangle is:

$\displaystyle A=\frac{bh}{2}$

$\displaystyle A=\frac{(h+9)h}{2}$

And its value is 180:

$\displaystyle \frac{(h+9)h}{2}=180$

Multiplying by 2:

$(h+9)h=360$

Operating:

$h^2+9h-360=0$

Factoring:

$(h-15)(h+24)=0$

The only valid positive solution is:

h = 15 cm

And b = h + 9 = 24

b = 24 cm

The base is 24 cm long.

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3 years ago

Can someone tell me if this is right?

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Answer:

yes it is right no one is mistake

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Which polynomial identity will prove that 49 − 4 = 45?

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