9514 1404 393
Answer:
D. (-3, -2)
Step-by-step explanation:
The equations have different coefficients for x and y, so will have one solution. The solutions offered are easily tested in either equation.
Using (x, y) = (-2, -3):
x = y -1 ⇒ -2 = -3 -1 . . . . False
Using (x, y) = (-3, -2):
x = y -1 ⇒ -3 = -2 -1 . . . .True
2x = 3y ⇒ 2(-3) = 3(-2) . . . . True
The solution is (-3, -2).
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If you'd like to solve the set of equations, substitution for x works nicely.
2(y -1) = 3y
2y -2 = 3y . . eliminate parentheses
-2 = y . . . . . . subtract 2y
x = -2 -1 = -3
The solution is (x, y) = (-3, -2).
Answer:
0.24
Step-by-step explanation:
0.32 ÷ 4 = 0.08
So, a quarter pound of potatoes costs 0.08.
0.08 x 3 = 0.24
So, three quarter pounds of potatoes (0.75) costs 0.24.
Face diagonal f = 7.0710678118655 ft
solid diagonal d = 8.6602540378444 ft
Answer:
25.9 miles
Step-by-step explanation:
To find out how far he can go on one gallon of gas, we divide miles by gallons.
311 miles/ 12 gallons
25.91666666 miles per gallon
So on one gallon of gas, he can go 25.9166666666 miles
Rounding to the nearest tenth.
25.9 miles
