Step-by-step explanation:
-x+4y= -15
-2x-3y=-8
the intersection point isn't (3,-5)
it's approximately (-1.1818 ,3.45455 )
ANSWER:
$28
STEP BY STEP:
first, you can add together the discounts to be a total of 65% off. Then, we find out what 65% of 80 is, which is 52. Finally, you subtract the total (80) by the dollars off (52) which gives us the answer of 28.
Hope this helps
Zeros of this function
- x²-x-6=0
- x²-3x+2x-6=0
- x(x-3)+2(x-3)=0
- (x+2)(x-3)=0
- x={-2,3}
ZEros of reciprocal function
The equation
- x²-(-1/2+1/3)x-(1/2)(1/3)=0
- x²-1/6x-1/6=0
Answer:
a/b = a * 1/b
Step-by-step explanation:
a/b = a * 1/b
this looks easy....
But what about
a / (1/b) = a*b
if you see any division, you can always multiply BOTH the numerator AND the denominator by the same amount. That is allowed because that is the same as multiiplying by the number 1.
So multiply by b/b and see what happens.
a / (1/b) = b/b * a / (1/b)
group the numerator AND the denominator
a / (1/b) = (b * a ) / b*(1/b)
a / (1/b) = (b * a ) / b/b
a / (1/b) = (b * a ) / 1
a / (1/b) = (b * a )
a / (1/b) = a*b
It is allowed because you can always multiply any number by 1 and that is because that will not change the original number. The number multiplied by 1 remains the same number.
This notion is very powerful and it can be used to turn any division into a multiplycation, and vice versa.
a / (1/b) = a*b
Answer:
28 tiles in 85 minutes
1 tile in 3 minutes
Step-by-step explanation:
Figure out how long it takes Meg to lay one tile - 50 / 15 - 3.33 minutes per tile
This suggests that Jessica should take less than 3.33 mins to lay one tile for the statement to be correct.
If she lays 20 tiles in 85 minutes, it will take her 85 / 20 = 4.25 minutes per tile, so it can't be this one.
If she lays 24 tiles in 85 minutes, it will take her 85 / 24 = 3.5416 minutes per tile, so it can't be this one.
If she lays 28 tiles in 85 minutes, it will take her 85 / 28 = 3.0357 minutes per tile, so it can be this one.
If she lays 1 tile in 3 minutes, it will take her 3 / 1 = 3 minutes per tile, so it can be this one.
If she lays 1 tile in 4 minutes, it will take her 4 / 1 = 4 minutes per tile, so it can't be this one.
:)