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kow [346]
3 years ago
8

What is the value of 9 + 21 (13 + 5)?

Mathematics
2 answers:
Leto [7]3 years ago
4 0

Answer:

387

Step-by-step explanation:

mestny [16]3 years ago
3 0

Answer:

387 :D

Step-by-step explanation:

i wish you luck in school, wear a mask and stay safe  :)

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The ratio of angles angles A:B:C is 5:4:3 . find measure of angle A and B And C
mr Goodwill [35]

Answer:

A=75

B=60

C=45

Step-by-step explanation:

5+4+3=12

every triangle is equal to 180 so we divide

180/12=15

then we multiply each angle by 15

5*15

4*15

and 3*15

don't forget to check your work by adding the answers together to get 180

8 0
3 years ago
125,600 surface area converted to volume?
Illusion [34]

Answer:

1256000

Step-by-step explanation:

My example:

Find the radius of the sphere by substituting 4.5? ft^3 for V in the formula in Step 1 to get: V=4.5? cubic feet.= (4/3)?(r^3)

Multiply each side of the equation by 3 and the equation becomes: 13.5 ? cubic feet =4?(r^3)

Divide both sides of the equation by 4? in Step 4 to solve for the radius of the sphere. To get: (13.5? cubic feet)/(4?) =(4? )(r^3)/ (4?), which then becomes: 3.38 cubic feet= (r^3)

Use the calculator to find the cubic root of 3.38 and subsequently the value of the radius “r” in feet. Find the function key designated for cubic roots, press this key and then enter the value 3.38. You find that the radius is 1.50 ft. You can also use an online calculator for this calculation (see the Resources).

Substitute 1.50 ft. in the formula for SA= 4?(r^2) found in Step 1. To find: SA = 4?(1.50^2) = 4?(1.50X1.50) is equal to 9? square ft.

Substituting the value for pi= ?= 3.14 in the answer 9? square ft., you find that the surface area is 28.26 square ft. To solve these types of problems, you need to know the formulas for both surface area and volume.

8 0
3 years ago
Find the values of the variables
Nikolay [14]

Answer:

corresponding value of equal matrix is equal

a=10

b= -6

c=3

Step-by-step explanation:

4 0
3 years ago
Find the value of X, please!
worty [1.4K]

Answer:

x=42°

Step-by-step explanation:

We know that 2 of the legs are congruent, so the angles opposite them will be congruent.

The angles of a triangle add up to 180°

This can be represented by 96+2x=180

2x=84

x=42

<u>Hope this helps :-)</u>

7 0
3 years ago
Read 2 more answers
What project did mary jackson work on at naca soon after she was hired?.
saw5 [17]
The project Mary Jackson worked on at nasa soon after she was hired was landing astronauts on the moon and how to return them safely back to earth.
3 0
2 years ago
Read 2 more answers
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