Five times the difference of twice a number and three, decreased by the sum of the number and eight, equals 13

The number is 4.

Step-by-step explanation:

Let the number be = x

Five times the difference of twice a number and three can be written as

Decreased by the sum of the number and eight,

Hence complete expression becomes:

Now solving for x;

=>

=>

=>

So we get x = 4

The number is 4.

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: