A) x + y = -80
B) 3x = y
x + 3x = -80
4x = -80
x = -20
y = -60
Answer:
b=49
Step-by-step explanation:
27+b=76
76-27= 49
b=49
Answer:
it is 20.5
Step-by-step explanation:
you need to add all of the numbers together
First, the equation needs to be put into slope-intercept form, which is y = -4/5x + 7/5. Then, you need to know what parallel and perpendicular lines are. REMEBER, parallel lines have the same slope, and perpendicular lines have slopes whose product equal -1. You just need to substitute. For the parallel line, -2 = -4/5(4) + b, and b = 6/5, so y = -4/5x + 6/5. For the perpendicular line, the slope is 5/4. Now substitute. -2 = 5/4(4) + b, and b = -7, so y = 5/4x -7.
