Answer: $36.60
Step-by-step explanation:
Convert 15% to decimals. You can do this by dividing by 100.
Now calculate 15% of 31.81 (0.15*31.81)
$4.77
if you add it to the bill you get 31.81+4.77=36.58
it says round to the nearest ten dollars=36.60
Evaluate 0.53n+5 when n=3 and when n=-3
2 answers:
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Answer:
( , 0 )
Step-by-step explanation:
To find the x- intercepts let y = 0, that is
2x² + 3x - 2 = 0
Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.
product = 2 × - 2 = - 4 and sum = + 3
The factors are + 4 and - 1
Use these factors to split the x- term
2x² + 4x - x - 2 = 0 ( factor the first/second and third/fourth terms )
2x(x + 2) - 1 (x + 2) ← factor out (x + 2) from each term
(x + 2)(2x - 1) = 0
Equate each factor to zero and solve for x
x + 2 = 0 ⇒ x = - 2
2x - 1 = 0 ⇒ 2x = 1 ⇒ x =
The x- intercepts are (- 2, 0 ), ( , 0 )