Select the best real-world problem for the equation x − 130 = 20. Then solve the equation. A Alf spent $130 on a physics text and found that he had only $20 left after his purchase. How much money did he have before buying the book? B Dan spent $130 on a physics text and found that he had only $20 left after his purchase. How much did the book cost? C Chuck spent $130 on a physics text and found that he had only $20 left after his purchase. How much money did he have after buying the book? D Bob spent $20 on a physics text and found that he had only $130 left after his purchase. How much did the book cost if it was taxed at a rate of 7.5%? The value of x is .

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:

i do not know the answer

step-by-step explanation:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is