Answer: B: n^2+6n+1
Step-by-step explanation:
A=n
B=2n+6
C=n^2-1
AB-C
n(2n+6)-n^2-1
2n^2+6n-n^2+1
n^2+6n+1
We can write the first part of this problem as: What is 6.5% of $29,990.
"Percent" or "%" means "per 100" or "out of 100". Therefore
6.5 hope this helps (:
%
can be written as
6.5
100
.
When dealing with percentages the word "of" means the product of or to multiply.
Let's call the sales tax amount we are looking for
s
.
We can now write the problem as:
s
=
6.5
100
×
$
29990
s
=
$
194935
100
s
=
$
1949.35
The sales tax on the car is: $1,949.35.
The total price of the car is then:
$
29
,
990.00
+
$
1
,
949.35
=
Answer:
i can't understand it as well
The bottom one is correct.
Answer:
(E) 450
Step-by-step explanation:
Let x represent the number of gallons of solution X that must be added to the mix. Then the amount of sugar in the mix is ...
0.20x +0.40·150 = 0.25(150 +x)
0.20x +60 = 37.5 +0.25x . . . eliminate parentheses
22.5 + 0.20x = 0.25x . . . . . . subtract 37.5
22.5 = 0.05x . . . . . . . . . . . . . subtract 0.20x
450 = x . . . . . . . . . . . . . . . . . . multiply by 20
450 gallons of solution X must be added to make a 25% sugar solution.
