Let x = amount of appliances Jack sold
Let y = amount of appliances Dion sold.
We need to construct a system of equations to solve this problem
33 = x + y
y = 2x - 3.
Let's solve this system of equations by substitution.
33 = x + (2x - 3). Combine like terms.
33 = 3x - 3. Add 3 to both sides.
36 = 3x. Divide both sides by 3
12 = x. Plug this value into one of our original equations.
33 = 12 + y. Subtract 12 from both sides
y = 21
Jack sold 12 appliances and Dion sold 21 appliances.
Answer:
<em>The speeds are 877 km/h and 947 km/h.</em>
Step-by-step explanation:
The slower plane travels at x km/h. The faster plane travels at (x + 70) km/h. The speed of separation is the sum of the speeds, (2x + 70) km/h.
They are 5472 km after 3 hours of travel.
speed = distance/time
2x + 70 = 5472/3
2x + 70 = 1824
2x = 1754
x = 877
The slower plane travels at 877 km/h.
x + 70 = 877 + 70 = 947
The faster plane travels at 947 km/h.
Answer:
C
Step-by-step explanation:
(a^2+b^2)^2=a^2+b^2
