1. C=2πr
We need to move r by itself on a side of the equation.
Divide both sides of the equation by 2π. This will cancel out the side with the r.
r=C/2π
2. A=1/2*b*h
Divide both sides by 1/2*h, isolating b
b=A/h
3.y=mx+b
Now we have to do reverse PEMDAS, we have to add/subtract before we can multiply or divide to simplify.
Subtract both sides by b
y-b=mx
Now divide both sides by m
x=
Remember we have to divide both terms y and -b by 2, so it goes on the bottom for both.
Answer:
y=x-5
Step-by-step explanation:
the slope is one
So to find the y intersect you need to plug in the numbers given, like this:
-2=3 + b
subtract the three
-5=b
the y intercept is -5
y=x-5
Answer:
21x4 + 8x3 - 40x2 + 15
Step-by-step explanation:
expand using distributive property.
Answer:
113.04 cm³
Step-by-step explanation:
diameter = 6cm
so radius = 3cm
Volume of sphere =
= 4 * 3.14 * 3 * 3 *3 / 3
= 4 * 28.26
= 113.04 cm³
Hello!
You can make two equations based on what you know
let x stand for andy's age
let y stand for Jeff's age
x = 2 + y
5 + x + 5 + y = 40
Put x into the second equation
5 + (2 + y) + 5 + y = 40
Combine like terms
12 + 2y = 40
Subtract 12 from both sides
2y = 28
Divide both sides by 2
y = 14
Put y into the first equation
x = 2 + (14)
x = 16
Andy is 16 and Jeff is 14
Hope this helps!