(-5x+7y=11) - (-5x+3y=19) =
4y = -8. (divide both sides by 4)
y = -2
Substitute
-5x + 7(-2) =11
-5x - 14 =11
-5x = 25
x = -5
y = -2 and x = -5
Answer:
Step-by-step explanation:
11 bakers makes 89 pretzels in 2.5 hours
11 bakers makes 35.6 pretzels in 1 hour
1 baker makes 3.23636 pretzels in 1 hour
so, 5.75 bakers in 1.5 hours at 3/23636 pretzels per hour will make....
5.75* 1.5 * 3.23636 = 27.9136 pretzels
2)
4x-10y=12
Subtract 4x from each side.
-10y=-4x+12
Divide both sides by -10
y=2/5x-6/5
3)
13=1/6y+2x
Subtract 2x from each side.
-2x+13=1/6y
Multiply both sides by 6.
-12x+78=y
Flip it around.
y=-12x+78
Hope this helps!
20/2.5 = 8
So 8 movies can be shown in 20 hours.
