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kvasek [131]
2 years ago
10

What is the area of the circle? Round to the nearest whole number, if necessary.

Mathematics
1 answer:
Alla [95]2 years ago
7 0
Well idk what the numbers are, but the formula to find the are is 3.14(pi) x r^2
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Solve the system using substitution<br> 8x+9y=15<br> 5x-2y=17
Otrada [13]

5x-2y=17\ \ \ \ |-5x\\-2y=-5x+17\ \ \ \ |:(-2)\\y=2.5x-8.5\\\\\text{substitute to the first equation}\\\\9x+9(2.5x-8.5)=17\ \ \ \ |\text{use distributive property}\\9x+22.5x-76.5=17\ \ \ \ |+76.5\\31.5x=93.5\ \ \ \ |:31,5\\x=3\\\\\text{substitute the value of x to the equation}\ y=2.5x-8.5\\\\y=2.5(3)-8.5=7.5-8.5=-1\\\\Answer:\ x=3,\ y=-1\to(3;\ -1)

8 0
3 years ago
(HELP PLS) A triangle has the coordinates
kari74 [83]
A(-4, -1)
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4 0
3 years ago
Jon recently drove to visit his parents who live 270 270 miles away. On his way there his average speed was 24 24 miles per hour
Ber [7]

Answer:

He drove there at 60 mph, and he drove back at 36 mph.

Step-by-step explanation:

one way distance = d = 270 miles

average speed on way back = s

average speed on the way there = s + 24

time driving there = t

time driving back = 12 - t

average speed = distance/time

distance = speed * time

going there:

270 = (s + 24)t

270 = st + 24t

going back

270 = s(12 - t)

270 = 12s - st

We have a system of equations:

270 = st + 24t

270 = 12s - st

Solve the first equation for t.

t(s + 24) = 270

t = 270/(s + 24)

Substitute in the second equation.

270 = 12s - s[270/(s + 24)]

270 = 12s - 270s/(s + 24)

Multiply both sides by s + 24.

270s + 6480 = 12s^2 + 288s - 270s

12s^2 - 252s - 6480 = 0

Divide both sides by 12.

s^2 - 21s - 540 = 0

(s - 36)(s + 15) = 0

s = 36 or s = -15

The average speed cannot be negative, so we discard the solution s = -15.

s = 36

s + 24 = 60

Answer: He drove there at 60 mph, and he drove back at 36 mph.

3 0
3 years ago
What is the answer and formula for 7f+5=68
gladu [14]
7f=68-5
7f=63
f=63/7
f=9
4 0
3 years ago
Please helpppppppp<br><br> If you don’t know it don’t answer please
vladimir2022 [97]

Answer:

x=36

y=72

Step-by-step explanation:

I didnt do this type of problem in a while but Im pretty sure its correct

6 0
2 years ago
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