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Juliette [100K]

3 years ago

15

Someone help me pls pls

1 answer:

victus00 [196]3 years ago

7 0

The correct answer is A

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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

Rom4ik [11]

Answer:

<em>The base is 24 cm long.</em>

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.

7 0

3 years ago

enot [183]

A
Because she deposits the same amount but got 60 dollars more for the birthday money.

5 0

3 years ago

Which is the best explanation ?

kipiarov [429]

Answer:

C

Step-by-step explanation:

The student hasn't finished the factoring yet.

<u>He still needs the step:</u>

0 = (2x + 5)(x + 1)

<u>The next step:</u>

0 = 2x + 5, 0 = x + 1
x = - 2.5, x = - 1

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2 years ago

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Please help me solve both of them

Kaylis [27]

Answer:

first one: a,d,e

second one: d

Step-by-step explanation:

pemdas

6 0

3 years ago

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A circle with a diameter of 10 has its center in the first quadrant. The lines y = -3 and x = -1 are tangent to the circle. Writ

yuradex [85]

Answer:

34

Step-by-step explanation:

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