150x0.8=120 (correct answers)
150-120=30 (incorrect answers)
she answered 30 questions incorrectly
No 3: he had to subtract the discount since its a discount and add on the sales tax afterwards
Answer:
39°
Step-by-step explanation:
i just took the test
Answer:
30
Step-by-step explanation:
Substitute the given values for y and z into the expression
zy + 4y = (2 × 5) + (4 × 5) = 10 + 20 = 30
U would solving using elimination or substitution method