Answer:
5x² - 10x - 15 = 0
Step-by-step explanation:
Given that the roots are x = 3 and x = - 1, then the factors are
(x - 3) and (x + 1) and the quadratic is the product of the factors, that is
f(x) = a(x - 3)(x + 1) ← a is a multiplier
Here a = 5, thus
f(x) = 5(x - 3)(x + 1) ← expand factors using FOIL
= 5(x² - 2x - 3) ← distribute parenthesis by 5
= 5x² - 10x - 15
Thus equation is
5x² - 10x - 15 = 0
Answer:
$856
Step-by-step explanation:
Find 7% of $800 and then add it to $800
Answer:
A 25% tip on a bill of $68.28 rounded to $70 would be <u>$17.50</u>
STEPS
<em>Step 1: </em>Round $68.28 to $70.00
<em>Step 2:</em> convert 25% to a decimal-------- .25
<em>Step 3:</em> multipy .25 x 70= 17.5
Let me know if you need any other help!!
Havent done this in years but i think it would just be 12
