While shopping for clothes, tracy spent $50 less than 3 times what daniel spent. tracy spent $40. let x represent how much daniel spent?

The Science class had a higher average test score after completing test 4.

Step-by-step explanation:

Average test score in your math class  is denoted by function: f(x)=0.2x+79

x is the number of the test taken.

The linear function g(x) represents the average test score in your science class, where x is the number of the test taken.

X    g(x)

1     86

2     84

3     82

Now to find function we will use two point slope form

Part A: Substitute x = 2 in f(x)

f(2) = 0.2(2) + 79 = 79.4

The test average for your math class after completing test 2 = 79.4

Part B

y=-2x+88

y=-2(2)+88=84

The test average for your science class after completing test 2 = 84

Part C:

Substitute x=4 in f(x) to get the test average for Math class  

f(4) = 0.2(4) +79 = 79.8

y=-2x+88

To get the test average for science class

y=-2(4)+88

y = 80

After completing test 4, the test average for Math class is 79.8, and the test average for Science class is 80.

80>79.8

Hence the answer is  The Science class had a higher average test score after completing test 4.