Answer:
$7.52 rounded
Step-by-step explanation:
$7.20x 104.5% (or 1.045)= $7.524
rouded, $7.524 would be $7.52
Answer: 2
Step-by-step explanation: y=mx+b
m= slope b= y-intercept
Answer:
Step-by-step explanation: 50 x. 10
Answer:
your answer is -1
Step-by-step explanation:
D = <u><em>distributive property</em></u>
S = <u><em>switch</em></u>
C = <u><em>combine</em></u>
I = <u><em>inverse operations</em></u>
F = <u><em>finalize</em></u>

Let x = number of 5 cent coins.
Then there are (x+2) 10 cent coins.
Let y = 20 cent coins.
Total coins: x+(x+2)+y = 30
2x+y=28
y = 28-2x (1)
Total value: 0.05x + 0.1(x+2) + 0.2y = 3.80
0.15x + 0.2y + 0.2 = 3.80
0.15x + 0.2y = 3.60 (2)
Substitute (1) into (2).
0.15x + 0.2(28-2x) = 3.60
-0.25x + 5.60 = 3.60
2.00 = 0.25x
8 = x
From (1), obtain y = 28 - 2(8) = 12
Answer: (x+2) = 8+2 = 10
Louise has 10 10-cent coins