Ok so in order to do this, you have to set up an equation. Let's make a=the score of the first test and b=the score of the second test. (You can choose different variables, it doesn't matter.) It says the sum of the two equals 170. So, a+b=170. It also says that the score of the first was 6 less than the second. This can be shown as a=b-6. Now you can plug this in for a in your original equation. It will look like:
(b-6)+b=170
You can solve for b.
2b-6=170
2b=176
b=88
Since you want a, plug into either equation for b. I'll use the second one.
a=88-6
So, a=82
Answer: Mary needs to pay $99.36 after using the discount coupon.
Step-by-step explanation:
Find 8% of the total items price and subtracted it from the original price to find the amount she needs to pay after the discount.
8% of 108 = 8.64
108 - 8.64 = 99.36
So $99.36 will be left to pay after using the coupon.
Answer:
B
Step-by-step explanation:
Note (f - g)(x) = f(x) - g(x)
f(x) - g(x)
= - 4x² - 6x - 1 - (- x² - 5x + 3) ← distribute parenthesis by - 1
= - 4x² - 6x - 1 + x² + 5x - 3 ← collect like terms
= - 3x² - x - 4 → B
