Amath quiz consist of 30 questions. the first 20 questions are worth 4 points each. the last 10 questions are worth 7 points each. no points will be deducted for each wrong answer. justin scores 124 points on a math quiz. how many of the first 20 questions and how many of the last 10 questions does he answer correctly?

25

Step-by-step explanation:

Total points: (20x4) + (10x7) = 150

Justin scored 124/150

150-124 = ones he didn't get correct

150-124 = 26

26 = 4 + 7 + 4 +7 + 4

We are trying to figure out how many he answered correctly NOT how many he got wrong.

There are 30 questions. He got 5 wrong. That means he got 25 correct.

He got 17 from the first 20questions and 8 from the last 10 questions

Step-by-step explanation:please see attachment for explanation

there are many solutions.

step-by-step explanation:

step 1: simplify both sides of the equation.

4x+6=4x^2+10x−4

step 2: subtract 4x^2+10x-4 from both sides.

4x+6−(4x^2+10x−4)=4x^2+10x−4−(4x^2+10x−4)

−4x^2−6x+10=0

step 3: factor left side of equation.

−2(2x+5)(x−1)=0

step 4: set factors equal to 0.

x=-5/2 or x=1

answer:      

step-by-step explanation: