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2 years ago

What’s the area of this figure

Mathematics

2 answers:

kvasek [131]2 years ago

8 0

Answer:

743.25m^2

Step-by-step explanation:

Area of triangle = 1/2bh

= 1/2 x 30 x 26

= 390

Area of semi circle = 1/2 πr^2

= 1/ 2 x 3.14 x 15 x15

=353.25m^2

= 390 + 353.25

= 743.25m^2

Tasya [4]2 years ago

6 0

743.25

Step-by-step explanation:

To find the area of a triangle you use this formula (h= height b=base) A=hb/2 So 26*30/2=390

To find the area of a circle you use this formula (r= radius π=3.14) A=πr^2 So 3.14*15^2=706.5 Now cut it in half because it's a half circle 706.5/2=353.25

Add them 353.25+390= 743.25

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Eighty, decreased by three times a

Marina86 [1]

Answer:

The number is 9.

Step-by-step explanation:

Lets write this as an equation first. We'll substitute the number for the variable x.

80 - 3x = 5x + 8

First, let's add 3x to both sides.

80 - 3x + 3x = 5x + 3x + 8

80 = 8x + 8

Next, let's subtract 8 from both sides.

80 - 8 = 8x + 8 - 8

72 = 8x

Finally, let's divide both sides by 8.

72/8 = 8x/8

9 = x

"x" is 9.

So the secret number is 9.

P.S.

This is my first answer to a Brainly question so please don't complain!

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2 years ago

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maks197457 [2]

What you must do in this case is to find the roots of the polynomial.
We have then:
x ^ 2 + 20x + 100 = 36
Rewriting:
x ^ 2 + 20x + 64 = 0
The values of the roots are:
x1 = -4
x2 = -16
Remember that the values of the roots are what make the polinome zero
Answer:
x1 = -4
x2 = -16

3 0

2 years ago

The height of a cylinder is twice its radius. A sphere whose radius is 2 inches less than the radius of the cylinder is carved o

ozzi

Graphing it out yields the radius of the cylinder is 5 inches.

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3 years ago

Jamie kicked a soccer ball that traveled along a path described by the parabola y = -x^2 +8x, where y equals the height of the s

andrey2020 [161]

We have that
y = -x²+8x

we know that
when the ball hint the ground is the x-intercepts of the graph
the x-intercepts is for y=0
so
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the solution is
x=0
x=8

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the distance between the x intercepts points =[8-0]-----> 8 ft

the answer is
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see the attached figure

6 0

3 years ago

Read 2 more answers

PLEASE ANSWER ASAP FOR BRAINLEST!!!!!!!!!!!!!!!!!!!

VladimirAG [237]

$4x-5$ is less than 25$

8 0

2 years ago