I am not sure but answer can be 1,5 or 96 and ir Can be wrong but ı am trying to help you
Answer:
We can write:
x + y = -2
xy = -80
We can rewrite the first equation as x = -y - 2 and then plug that into the second equation to get (-y-2) * y = -80 → -y² - 2y = -80 → y² + 2y - 80 = 0 → (y - 8)(y + 10) = 0 → y = 8, -10. Substituting these values into the first equation we get x = -10, 8 so the answer is (x₁, y₁) = (-10, 8) or (x₂, y₂) = (8, -10).
2x=y
×+y=36
x=Ed's age
y=His brothers age
Then you plug in Y into the secound equation.
×+2×=36.
You then add the two x together.
3x=36
The to get x by itself you take 36 and dive by 3 to get 12.
x=12
Then plug 12 into the equation
12+y=36
Then get y by itself.
y=24.
So, Ed's age is 12 and Ed's brother's age is 24.
Answer: 5(3-x)<-2x+6 =
Step-by-step explanation:
Inequality form: X=3
Interval notation: (3,∞)
The actual distance is 280 miles
The distance for round trip is 560 miles
It costs $ 72.8 for gas on a round trip
<em><u>Solution:</u></em>
Given that,
Sean is looking at an atlas and the key at the bottom shows for every 1 and 1/2 inch on the map is approximately 80 miles of actual distance
Therefore,
Sean measured it to be about 5 and 1/4 inches on the map
Let "x" be the actual distance
Thus, we can say,
This forms a proportion and we can solve the sum by cross multiplying
Thus the actual distance is 280 miles
<em><u>How far will Sean drive round trip (there and back, no sightseeing)? </u></em>
Round trip = 280 + 280 = 560 miles
If Sean’s car gets 20 miles per gallon and gas averages about $2.60 a gallon, approximately how much will Sean spend on gas for a round trip?
cost = 28 x 2.60 = 72.8
Thus it costs $ 72.8 for gas on a round trip