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2 years ago

Which equation can be used to solve for in the following diagram? (8x - 20)° 3xº

Mathematics

1 answer:

gayaneshka [121]2 years ago

7 0

Answer:

A. 3x° + (8x - 20)° = 90°

Step-by-step explanation:

The two given angles are complementary and sum to 90°

3x° + (8x - 20)° = 90°

Therefore correct choice is A.

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liam is setting up folding chairs for a meeting. if he arranges the chairs in 9 rows of the same length, he has 3 chairs left ov

svlad2 [7]

Hello, Here is a link to the answer. I am posting this link because it is a Brainly link and a verified answer brainly.com/question/219158

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2 years ago

A large totem pole near Kalama, Washington, is 100 feet tall. On a particular day at noon it casts a 219-foot shadow. What is th

zhenek [66]

Answer: Angle of elevation of sun at that time is 24.51° .

Step-by-step explanation:

Since we have given that

Height of a large totem pole near Kalama, Washington = 100 feet

Length of a shadow at noon = 219 foot

We need to find the angle of elevation of sun at that time .

As we know the formula for "Tangent ":

$\tan\theta=\frac{AB}{BC}\\\\\tan\theta=\frac{100}{219}\\\\\tan\theta=0.456\\\\\theta=\tan^{-1}(0.456)\\\\\theta=24.51\textdegree$

Hence, Angle of elevation of sun at that time is 24.51° .

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3 years ago

3×+2×^2-9Evaluate the expression below when x=9

Blizzard [7]

The answer is 180.

Hope that helped!

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3 years ago

Read 2 more answers

Marlene decided to buy 2 bags of apples weighing 3 1/4 pounds each, instead of 3 bags weighing 2 2/5 pounds each. Did she end up

navik [9.2K]

The first fill in the blank is 6 1/2

The second one is 7 1/5

So, she ended up buying fewer apples

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3 years ago

Find the surface area of the pyramid .The surface of the pyramid is _ in2 (Type a whole number .)

garik1379 [7]

Given the figure of a square pyramid

The area pf the base =area of the square of side 14 in =

$14\cdot14=196in^2$

the area of the sides = 4 times the area of a triangle of a base of 14 in and a height of 12 in

so, the area of the sides =

$4\cdot\frac{1}{2}\cdot\text{base}\cdot\text{height}=4\cdot\frac{1}{2}\cdot14\cdot12=336in^2$

So, the surface area of the pyramid =

$196+336=532in^2$

So, the answer will be A = 532 in^2

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1 year ago