(n+1)x 2=10
2n+2=10
2n=8
n=4
Answer: -4.8, -4.08, -3.9, 0, 3, 3.1
Step-by-step explanation:
Think of these numbers on a number line. Starting at zero number to the right all positive numbers ex: 0,1,2,3,4
Then, starting at zero moving left number negative numbers ex: -4,-3,-2,-1,0
mary + mom = 36
mom = 5x mary
mary + 5mary = 36
6 mary = 36
mary = 36/6 =6
mary is 6 years old
her mother is 5 x 6 = 30 years old
Answer:
59
Step-by-step explanation:
The equation is
944 - 5x = 1180 - 9x
Notice what is being said. You start with 944 gallons and take off 5 per week
You also start with 1180 gallons and take on 9 per week.
You want to know when the two are equal. The second tank is larger, but it leaks more. That's what's going to bring about equality.
Add 9x to both sides
944 - 5x + 9x = 1180
944 + 4x = 1180
Subtract 944 from both sides.
4x = 1180 - 944
4x = 236
Divide by 4
x = 236/4
x = 59 weeks
Answer:
3 cm
Step-by-step explanation:
So the area of the total circle is:
If you remove the outer band you have the area of the inner circle
This means that the inner circle had an area of
area = pi * r^2
9 pi = pi * r^2
r =
So the radius of the inner circle is 3.
