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Stolb23 [73]
4 years ago
12

Find the area of the trapezoid.

Mathematics
1 answer:
Rus_ich [418]4 years ago
3 0
The correct answer is 337.5 feet. A+B/2 times the height. 20+25=45. 45/2=22.5. 22.5*15=337.5 feet.
~Hope this helps
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Tan ^-1 (-1). enter your answer in radians
Assoli18 [71]

Answer:

\theta=\frac{3\pi}{4},\theta=\frac{7\pi}{4}

Step-by-step explanation:

we are given

tan^{-1}(-1)

Let's assume angle as theta

\theta =tan^{-1}(-1)

so, we get

tan(\theta)=-1

now, we can use unit circle and find theta

and we get

\theta=\frac{3\pi}{4},\theta=\frac{7\pi}{4}

So, solution is

\theta=\frac{3\pi}{4},\theta=\frac{7\pi}{4}


8 0
3 years ago
Pizzazz Publication is having some books printed. The printer charges $800 plus $5 per book. How many books can be printed for $
Airida [17]

Answer:

4

Step-by-step explanation:

800+5=805

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5 0
4 years ago
Need to be sure that 23 and 24 is correct help !!!!
krok68 [10]
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4 0
4 years ago
Using the following equation, find the center and radius of the circle. You must show all work and calculations to receive credi
adoni [48]

Answer:

r = 4

The center is:

(2, -4)

Step-by-step explanation:

We have the following equation

x^2 - 4x + y^2 + 8y = -4

The general equation of a circle has the following form

(x-h)^2 + (y-k)^2 = r^2

Where r is the radius and the point (h, k) is the center of the circle

To transform the given equation in the general equation of a circumference we must use the method of square completions

Step 1

(x^2 - 4x) + (y^2 + 8y) = -4

<u>Step 2</u>

<u> </u>Add and subtract (\frac{b}{2})^2 For an equation of the form

ax^2 +bx +c

(x^2 - 4x +4)-4 + (y^2 + 8y +16) -16= -4

<u>Step 3  </u> Factor the expressions within the parentheses

(x-2)^2-4 + (y+4)^2 -16= -4

<u>Step 4 Simplify</u>

(x-2)^2 + (y+4)^2= -4+16+4

(x-2)^2 + (y+4)^2= 4^2

Finally

r = 4

The center is:

(2, -4)

7 0
3 years ago
‼️‼️help please ASAP
Zanzabum
By the Triangle Angle-Sum Theorem, all the angles in a triangle have to add up to equal 180.  Therefore, 180-35-88=57, second choice down.
6 0
4 years ago
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