27. B
28. 800 more people
29. He should receive $11.20 back. I came up with this by taking 81 (the total cost of the items) and subtracting 15%. After that, I got 68.85-the price after using the coupon. Then, I added the total amount of money he had and came up with 80 (he had 4 twenty dollar bills). Finally, I took away 68.85 from 80 and ended with the answer 11.20.
30. Store b is offering a better deal for the shoes. After using the percent discount for store a, I came up with 59.50. However, when I did the same with store b, I ended with 51.30, the better deal of the two stores.
Answer:

Step-by-step explanation:
<u>Given:</u>
Mass = m = 1.76 g
Volume = v = 0.5 cm²
<u>Required:</u>
Density = ρ = ?
<u>Formula:</u>
ρ = m / v
<u>Solution:</u>
ρ = 1.76 / 0.5
ρ = 3.52 g/cm³
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AH1807</h3>
Answer:70.02 ft
Step-by-step explanation:
adjacent=100ft
Opposite=x
Φ=35
From SOHCAHTOA we get
TanΦ=opposite ➗ adjacent
Tan35=x ➗ 100 Tan35=0.7002
0.7002=x ➗ 100
Cross multiply
0.7002 x 100=x
70.02=x
x=70.02
y=3x-13 is equation of the line that is parallel to the line 3x - y = 2
and passes through (6,5).
Answer:
y = -2
Step-by-step explanation:
<u>SOLUTION :-</u>
Solve the equation.
- Add 8 to both sides in order to isolate the equation.


∴ y = -2
<u>VERIFICATION :-</u>
To verify the solution of y , just put the solution (y = -2) in place of y in equation and check whether L.H.S = R.H.S.
L.H.S :-
-2 - 8 = <u>-10</u>
R.H.S. :-
<u>-10</u> (already given)
⇒L.H.S. = R.H.S. (verified)