Can you guys help me with #13 please I don't get it

Mathematics

2 answers:

Furkat [3]3 years ago

5 0

Your taking off $20 from the amount that you have to begin with

lilavasa [31]3 years ago

5 0

Withdraw 20 means Subtract 20.

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A builder uses squares to lay out various projects. Write two equations. The first equation should express the area of the squar

Gnoma [55]

Area as a function of length can be written as

f(l) = l^2

And volume of cube can be expressed as a function of side s as,

f(s) = s^3

3 0

2 years ago

What are the measures of Angles a,b, and c? Show your work and explain your answers. Will marks best answer as Brainliest

Soloha48 [4]

Angle a is directly opposite from a 40 degree angle, so a=40. Then we can find b since the sum of the angles of all triangles is 180 and there is a right angle in there along with angle a:
$180=90+40+b$
$b=50$

Last, to find c we just notice that it is supplementary with an angle of measure 65, so:
$c+65=180$
$c=115$

So our angles are a=40, b=50, c=115.

5 0

3 years ago

The eight of a cone-shaped container is 18 centimeters and it’s radius is 7 centimeters. Meg fills the container completely with

ankoles [38]

Hello!

The find the volume of a cone you divide the product of the base and height by 3. First we find the area using $\pi$ r².

A=49(3.14)=153.86

Now we multiply this by the height.

153.86(18)=2769.48

Now we divide by 3.

2769.48/3=923.16

Now we divide this number by 21 to see how many days it will take for the container to become empty.

923.16/21=43.96≈44

Therefore, our answer is A) 44 days.

I hope this helps!

8 0

3 years ago

Joan is selling handmade bead necklaces at a local art fair. She paid $250 to reserve her booth. The cost of supplies for each n

Inga [223]

Y=250+2x is the amount she spends
y=12x is the amount she makes

If the amount she spent = the amount she makes then she break even

250+2x=12x
250=12x-2x
250=10x
So x = 250/10=25 necklaces she needs to sell to break even

Answer is 25 necklaces

3 0

3 years ago

Read 2 more answers

Zaheer, a boy of height 1.5m was watching the entire programme. Initially he observed the top of theflagpoleat an angle of eleva

torisob [31]

Answer:

$h = 15.163\ meters$

Step-by-step explanation:

(Assuming the correct angles are 30° and 45°)

We can use the tangent relation of the angle of elevation to find two equations, then we can use these equations to find the height of the pole.

Let's call the initial distance of the boy to the pole 'x'.

Then, with an angle of elevation of 30°, the opposite side to this angle is the height of the pole (let's call this 'h') minus the height of the boy, and the adjacent side to the angle is the distance x:

$tan(30) = (h - 1.5) / x$

Then, with an angle of elevation of 45°, the opposite side to this angle is still the height of the pole minus the height of the boy, and the adjacent side to the angle is the distance x minus 10:

$tan(45) = (h - 1.5) / (x - 10)$