What is the formula for a half circle?

Answers

Answer 1
Answer: A semi-circle is half of a circle and the area of a circle of radius r is r2. We know that the radius is 9ft. Pi is approximately 3.14 or 22/7. Now you just have to plug in the numbers and you will find the area! cx 

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The Windows on the first floor of a building are 3 1/2 yards wide. The Windows on the second floor of the building are 1 7/9 yards wide. How much wider are the Windows on the first floor than the second floor

Answers

the answer, is 2 1/9. subtract  1 7/7 from 3 1/2, and you'll get 2 1/2

(hope this helps)

What is the next term of the geometric sequence? 5,15,45,

Answers

135
5x3=15, 15x3=45, so 45x3=135

Simplify. y^-3




............

Answers

Answer:

1/y^3

Step-by-step explanation:

What is the factorization of the expression below?16x^2 - 49
A. (8x + 7)(2x-7)
O B. (4x + 7)(4x - 7)
O C. (8x-7)(2x-7)
O D. (4x-7)(4x-7)

Answers

Answer:

B

Step-by-step explanation:

16 x² - 49 ← is a difference of squares and factors in general as

a² - b² = (a + b)(a - b), thus

16x² - 49

= (4x)² - 7²

= (4x + 7)(4x - 7) → B

Answer:

B

Step-by-step explanation:

There is no number between 16x and 49. So only think about the number being squared for 49; which is 7.

Then 49 is negative, so you must have both positive and negative signs in both parenthesis. Otherwise, positive times positive is positive, and negative times negative is also positive.

4x4 is 16. That's why you put fours in front of Xs.

I am sorry for getting this wrong (if i did)

in a class of 28 sixth graders all but one of the students are 12 years old. witch two data measurements are the same for the students ages/ what are those measurements? please help

Answers

out of 28 kids there is one that isnt 12
so 27 kids are 12 years old
1 isnt
concluding that, that 6th grade might be 11
so 1 out of 28
1:28


A basketball team scored 60 points in the firstgame and 50 points in the second game. How
many points did the team score in the third
game if their mean score for the 3 games was
51 points?

Answers

The answer should be 43
51 x 3 = 153
153-60-50=43

Answer:

43

Step-by-step explanation: