Sophia’s math test is worth 130 points and has 40 problems. Each problem is worth either 4 points or 3 points. How many of each question type were on the test?

There are 30 questions worth 3 points and 10 questions worth 4 points.

Step-by-step explanation:

If you try to plug in some numbers, you can try 20 questions for 4 and 20 questions for 3. That would add up to 140 questions. That means that the questions worth 4 points will have to be reduced that the ones worth 3 will have to increase. If you try 30 times 3, it will equal 90. You then try 10 times 4 and that equals 40. If you add 90 and 40, then you get 130. Therefore, there are 30 questions worth 3 points and 10 questions worth 4 points. :D

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true