3 years ago

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Mathematics

1 answer:

lubasha [3.4K]3 years ago

3 0

Answer:

Step-by-step explanation:

Comma comma comma comma

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Please help me I will give you alot of points

emmasim [6.3K]

I would say it’s 240

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3 years ago

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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:

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

(NEED HELP PLS HELP) i really need help

zalisa [80]

Answer:

the answer I believe is c

Step-by-step explanation:

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3 years ago

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Find the value of x, rounded to the nearest tenth.

Mashcka [7]

It’d be 12.458 , rounded to the nearest tenth makes it 12.5. Hopefully, I helped.

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3 years ago

What is the value of x2+9x+20 when x could be -5, -3 or -6

ANTONII [103]

Answer:

Step-by-step explanation:

You should use a ^ to indicate an exponent. x^2 is the same as x².

x² + 9x + 20

Replace the x with (-5).

(-5)² + 9(-5) + 20 = 25-45+20 = 0

Then do the same with x = (-3):

(-3)² + 9(-3) + 20 = 9 - 27 + 20 = 2

You can do x = (-6)

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3 years ago