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Anna [14]
3 years ago
12

Given a diameter of 24ft what is the exact area of the circle?

Mathematics
1 answer:
anyanavicka [17]3 years ago
8 0

Answer:

452.16

Step-by-step explanation:

r =  \frac{1}{2}  \times 24 = 12 \\ \\ \pi \:  {r}^{2}  \\  =  3.14  \times 12 \times 12 \\  = 452.16

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M – 2.3 – 0.7m = 1.6
posledela

Answer: m = 13 ;)

Step-by-step explanation:

5 0
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Which of the following statements is true?
boyakko [2]

Answer:

B) Aluminum and steel are good conductors of electricity.

Step-by-step explanation:

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At the city museum, child admission is $5.20 and adult admission is $9.90. On Wednesday, three times as many Adult tickets to ch
Karo-lina-s [1.5K]
Child=x
Adult=y
y=3x
5.2x+9.9y=767.8
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5.2x+29.7x=767.8
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6 0
3 years ago
The area of a square is tripled by adding 10 cm to one dimension and 12 cm to the other. Determine the side length of the square
Rina8888 [55]
Area = length *width
A = x²
3x² = (x+10)(x+12)
3x² = x²+10x+12x+120
3x² = x²+22x+120
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0 = -2x²+22x+120
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(x+4)(x-15)
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4 0
3 years ago
A mistake was made in mixing the lemonade—<br> PLEASE HELP!!
beks73 [17]

Answer:

Part A:

4 + x = y

0.5*4 + 1*x = 0.7*y

x = 8/3\ quarts\ of\ 100\%\ solution

y = 20/3\ quarts\ of\ 70\%\ solution

Part B:

x + y = 10

2x + 3y = 23

x = 7 and y = 3

Step-by-step explanation:

Part A:

The inicial concentration of the lemonade is 50%, and the volume is 4 quarts, and we will add x quarts of a lemonade with a concentration of 100%, so the total volume will be y, and the concentration will be 0.7, so we have that:

4 + x = y

0.5*4 + 1*x = 0.7*y

Using the value of y from the first equation in the second one, we have:

2 + x = 0.7*(4 + x)

2 + x = 2.8 + 0.7x

0.3x = 0.8

x = 8/3\ quarts

y = 4 + 8/3 = 20/3\ quarts

Part B:

If he shoots a total of ten targets, we can write the equation:

x + y = 10

Each stationary target is 2 points, and each moving target is 3 points, so if the total points is 23, we have:

2x + 3y = 23

If we subtract the second equation by two times the first one, we have:

2x + 3y - 2*(x + y) = 23 - 2*10

2x + 3y - 2x - 2y = 23 - 20

y = 3

x + 3 = 10 ⇒ x = 7

4 0
3 years ago
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