Calculate the percentage increase,work out the difference (increase) between the two numbers you are comparing. Then divide the increase by the original number and multiply the answer by 100.
520-500 = 20
20÷500 =.04
.04 ×100= 4%
Use guess and check, but u can also use equations
(a) The relation is a function because each value of x maps onto only one value of y.
(b) Domain is ![(-\infty, 3]](https://tex.z-dn.net/?f=%28-%5Cinfty%2C%203%5D)
, range is 
.
2a
3c
4b
Cross multiply for 2
Put 4x-5=3x-10 and subtract 3 on both sides. After that add 10 to both sides for 3
Divide everything by 5 and multiply everything by -2 for 4
What is your states sales tax rate??
