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melamori03 [73]
3 years ago
10

8c, please and thank you!

Mathematics
1 answer:
Ivan3 years ago
8 0

Step-by-step explanation:

Please repost the question thanks

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AB is tangent to C. I need to find the value of r.
serious [3.7K]
Tangent always meets radius at 90° angle.

Angle ABC = 90° so Pythagoras' theorem applies.

r² + 4² = (r+2)²
r² + 16 = r² + 4r + 4
12 = 4r
r = 3


5 0
3 years ago
Someone help please :(
Hunter-Best [27]

Answer:

Answers in step-by-step.

Step-by-step explanation:

We are going to make Sarah the variable "s."

Using the given information, the following equation is derived to calculate Sarah's distance.

  • S=2n-5

And the following equation will be used to calculate what Sarah collected using "p" for pledged money.

  • P=18S

If Sarah collected $450 in pledges, we can use the preceding formula to calculate her distance.

  • P=18S
  • 450=18S
  • 450/18=S
  • 25 miles = S

Using Sarah's distance, we can calculate Semir's either the first equation.

  • S=2n-5
  • 25=2n-5
  • 30=2n
  • 15=n
  • Semir walked 15 miles.

We already found Sarah's distance to be 25 miles.

Now SungSo is making the same amount as Sarah. He collects $450 total, but he got $72 from his grandmother initially, so subtract 72 from 450 to get the amount he collected from walking.

  • 450-72=$378

His formula is the same as Sarah's, but we'll use SS for his variable.

  • P=18SS
  • 378 = 18SS
  • 378/18=SS
  • 21= SS
  • SungSo walked 21 miles.

4 0
3 years ago
[PLEASE HELP! 49 POINTS PER ANSWER!]
blagie [28]

A negative exponent for powers of 10 represent numbers between 0 and 1.

5 0
3 years ago
A salt March Harvest house mouse ran a 360 centimeter straight course race in 9 seconds.How fast did it run
baherus [9]

Answer:

r=d/t

r=360 cm / 9 sec= 40 cm per second

5 0
2 years ago
What is 795,431 rounded to the nearest ten thousand?
nadya68 [22]
I’m pretty sure the answer would be A because the 5 makes the 9 round up to ten and then the 7 becomes an 8.
8 0
3 years ago
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