In a 50- question test, the highest score in the class is three times the lowest score minus four. The difference between the highest score and the lowest score is 30. What is the highest score? A) 37 B) 27 C) 47 D)28

Highest score is 21.5

Step-by-step explanation:

Let the highest score be h

Let the lowest score be l

Therefore

h = 3l - 4 (1)

and

h - l = 30 (2)

I. E.

h = 30 - l (3)

Substituting (3) in (1)

30 - l = 3l - 4

Collecting like terms

30 + 4 = 3l + l

34 = 4l

l = 34/4

l = 8.5

Then substitute l = 8.5 in (1)

h = 3l - 4

h = 3(8.5) - 4

h = 25.5 - 4

h = 21.5

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: