Answer:
Step-by-step explanation: add the equations
2x² = 30
x² = 15
y² = 12 - 15
= -3
x4 -y4 = 15² - (-3)²
= 216
volume = L x W X H
2 1/4 x 7/8 x 1 1/2 = 2 61/64 cubic meters
1 cubic meter = 1000 liters
2 61/64 = 2.953125
2.953125 * 1000 = 2,953.125 liters ( Round answer as needed )
please mark brainliest
Step-by-step explanation:
-5+4=-1
-3+4=1
0+4=4
4+4=8
Let x = number of adult tickets, and y = number of children tickets. One equation must deal with the number of tickets, and the other equation must deal with the revenue from the tickets.
Then x + y = 300 is the number of tickets
12x + 8y = 3280 is the revenue from the tickets.
Using the substitution method:
x + y = 300 ⇒ y = 300 - x ⇒ Equation (3)
12x + 8y = 3280 ⇒ 12x + 8(300-x) = 3280 ⇒ x = 220
y = 300 - x ⇒ y = 300-220 ⇒ 80
Therefore 220 adult tickets and 80 children's tickets were sold.
Answer:
Step-by-step explanation:
I'm guessing A and J. Makes the most sense.