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4 years ago

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

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

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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:

Step-by-step explanation:

800+5=805

4000÷805=4.9689441

5 0

4 years ago

Need to be sure that 23 and 24 is correct help !!!!

krok68 [10]

I’m not sure what you are talking about is there a picture or something because I do not see what you are talking about

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

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

Step 2

Add and subtract $(\frac{b}{2})^2$ For an equation of the form

$ax^2 +bx +c$

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

Step 3 Factor the expressions within the parentheses

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

Step 4 Simplify

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

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

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