Hello!
4x - 9y = 20
2x - 6y = 16
You first need one of the variables have the same coefficient
We can do this by multiplying the second equation by 2
4x - 12y = 32
Subtract the equations to get rid of x
4x - 9y = 20
4x - 12y = 32
3y = -12
Divide both sides by 3
y = -4
Put y into one of the original equations
2x - 6(-4) = 16
Multiply
2x - -24 = 16
We you subtract a negative it is the same as addding
2x + 24 = 16
Subtract 24 from both sides
2x = -8
Divide both sides by 2
x = -4
The answers are x = -4 and y = -4
Hope this helps!
Answer:
Tina's favorite shade of teal is made with 7777 ounces of blue paint for every 5555 ounces of green paint. Tyler's favorite shade of teal is made with 5555 ounces of blue paint for every 7777 ounces of green paint.
Step-by-step explanation:
Answer:
r=8.74038744 m
and surface area=1303.76211 m2
Step-by-step explanation:
Answer:
∠ DBC = 60°
Step-by-step explanation:
BD is an angle bisector , so
∠ DBC = ∠ ABD = 60°
