3 years ago

AB is tangent to C. I need to find the value of r.

1 answer:

5 0

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

You might be interested in

Let f(x) = .............

galben [10]

Answer:

Step-by-step explanation:

g(3) = -2(3)^2 -4 = 2(9) -4 = 18-4 = 14

|f(2)| = | 2^2 -3| = | 4-3| = 1

(g(3) +2) = (14+2) = 16

4* |f(2)| = 4*1 = 4

16/4 = 4

5 0

3 years ago

Solve 28 + 7y =91<br><br>Y=.....

Anna35 [415]

Answer:

$y = 9$

Step-by-step explanation:

$28 + 7y = 91 \\ 7y = 91 - 28 \\ 7y = 63 \\ \frac{7y}{7} = \frac{63}{7} \\ y = 9$

8 0

3 years ago

Read 2 more answers

What is the y-intercept of the equation 2g(x)+2x=4

uysha [10]

2g(x) +2x=4

2( g(x) +x) = 2(2)

g(x) + x= 2

g(x) = 2- x

To get y intercept,

put x=0

g(x) = 2- 0

g(x) = 2

So,y intercept = 2

7 0

3 years ago

If 1 16 oz can cost. $1 how much is 8 40oz cans

Studentka2010 [4]

Answer:

8 I think

Step-by-step explanation:

I did 40÷16=2.5 then 2.5×8=20

3 0

3 years ago

for his long-distance phone service, Kareem pays a $2 monthly fee plus $0.12 per minute. Last month, Kareem's long-distance bill

beks73 [17]

$13.52-$2=$11.52

$11.52 \div 0.12 = 96$

Kareem was billed for 96 minutes.

Hope this helps. - M

8 0

3 years ago