Answer:
100(1/a + 1/b)
Step-by-step explanation:
Machine A takes a hours to make 100 bolts
- Then machine A makes 100/a bolts in one hour
Machine B takes b hours to make 100 bolts
- Then machine B makes 100/b bolts in one hour
<u>Two machines will make:</u>
- 100/a + 100/b = 100(1/a + 1/b)
bolts in one hour
-7x+2y=-13
x-2y=11
add them euations
-7x+2y=-13
<u>1x-2y=11 +</u>
-6x+0y=-2
-6x=-2
divide both sides by -6
x=1/3
sub back
x-2y=11
1/3-2y=11
minus 1/3 both sides
-2y=10 and 2/3
divide both sides by -2 (or times both sides by -1/2)
y=-5 and 1/3
x=1/3
y=-5 and 1/3
(1/3,-16/3)
Answer is y = x + 52
you can substitute x with x and substitute y with y
for example:
x = 2 y = 54
54 = 2 + 52
54 = 54
it’s true
Answer:
yes
Step-by-step explanation:
