Answer:
admission price of each parent = $7.5
admission price of each child = $15
Step-by-step explanation:
x = admission price of each parent
y = admission price of each child
Robinson family:
2x + 4y = 75
Moore family:
2x + 3y = 60
2x + 4y = 75 (1)
2x + 3y = 60 (2)
Subtract (2) from (1)
4y - 3y = 75 - 60
y = 15
Substitute y = 15 into (1)
2x + 4y = 75
2x + 4(15) = 75
2x + 60 = 75
2x = 75 - 60
2x = 15
x = 15/2
x = 7.5
I think it’s D for the equation since it’s going to units back to answer the equation.
<h3>
Answer: Either T + 0.08T or 1.08T</h3>
Work Shown:
T = average Celsius temperature two Sundays ago
8% = 8/100 = 0.08
8% of T = 0.08T
L = average Celsius temperature last sunday
L = 8% higher than T
L = T + (8% of T)
L = T + 0.08T
L = 1.00T + 0.08T
L = (1.00 + 0.08)T
L = 1.08T
The 1.08 refers to the idea that L is 108% of T
Answer:
7 L of 30% acid
3 L of 50% acid
Step-by-step explanation:
If x is the volume of 30% acid, and y is the volume of 50% acid, then:
x + y = 10
0.30 x + 0.50 y = 0.36 (10)
Solve the system of equations using substitution.
0.30 (10 − y) + 0.50 y = 3.6
3 − 0.30 y + 0.50 y = 3.6
0.20 y = 0.6
y = 3
x = 7
The chemistry teacher needs 7L of 30% acid and 3L of 50% acid.
9514 1404 393
Answer:
30°
Step-by-step explanation:
The angle a line makes with the x-axis is arctan(slope). Here, that is ...
angle with x-axis = arctan(√3) = 60°
So, the angle made with the y-axis is the complement of this:
angle with y-axis = 90° -60° = 30°
