Answer:
0.25.
Step-by-step explanation:
.
Answer:
a) 15
Step-by-step explanation:
x+8
substitute x value in
7+8
=15
Answer:
<h3> 26²/₃ liters of 15% acid and 13¹/₃ liters of 33% acid</h3>
Step-by-step explanation:
Concentration Amount of Amount
of Solution Solution (L) of Acid
15% x 0.15x
33% y 0.33y
21% 40 0.21•40
x + y = 40 ⇒ x = 40 - y
0.15x + 0.33y = 0.21•40
0.15(40 - y) + 0.33y = 0.21•40
6 - 0.15y + 0.33y = 8.4
0.18y = 2.4
y = 13¹/₃
x = 40 - 13¹/₃ = 26²/₃
Step-by-step explanation:
The total bill will be the sum of the rent and the cost for the total time spent.
$15 + $6 * 2.5
$15 + $15
$30
