Answer:

Step-by-step explanation:
we know that
The probability that it will hit a point in the outer (yellow) ring is equal to divide the area of the yellow ring by the total area of the target
step 1
Find the area of the yellow ring
![A=\pi [7^{2} -5^{2}]](https://tex.z-dn.net/?f=A%3D%5Cpi%20%5B7%5E%7B2%7D%20-5%5E%7B2%7D%5D)

step 2
Find the total area of the target
![A=\pi [7^{2}]](https://tex.z-dn.net/?f=A%3D%5Cpi%20%5B7%5E%7B2%7D%5D)

step 3
Find the probability

Convert to percentage

(x-5)(x+2)=0
roots: x=5 and x= -2
see attached photo for steps
Answer:
x = -4
Step-by-step explanation:
Step 1: Write equation
-x + 3 = 7
Step 2: Solve for <em>x</em>
- Subtract 3 on both sides: -x = 4
- Divide both sides by -1: x = -4
Step 3: Check
<em>Plug in x to verify it's a solution.</em>
-(-4) + 3 = 7
4 + 3 = 7
7 = 7
Answer:
0- 11 times
1,2,3,4,5,6,7,8,9- 12 times
<u><em>Answer: m=2 and 2=m *The answer should be have positive sign.*</em></u>
Step-by-step explanation:
4m-7+10=15-2m ← Group like terms
add/subtract numbers
-7+10=3
4m+3=15-2m
subtract by 3 both sides of an equation.
4m+3-3=15-2m-3
simplify.
4m=-2m+12
add 2m both sides of an equation.
4m+2m=-2m+12+2m
simplify.
6m=12
divide by 6 both sides of an equation.
6m/6=12/6
simplify by equation.
12/6=2
6*2=12
2*6=12
12/2=6
m=2
Hope this helps!
Thanks!
Have a great day!