Take the second equation and flip it around so the y on the left ends up on the right and the 4x on the right ends up on the left. This makes all negatives positive and all positives negative. -4x + 12 = y
Then add the first equation to the second equation
4x +12 = -7y
<u>-4x + 12 </u>=<u> y </u> this eliminates the x's
<u>24</u> = -<u> 6y</u> then divide by - 6
- 6 - 6
- 4 = y<u>
</u>So if you know that y = negative 4, you can substitute into either equation. I pick the second one because I am a lazy person.
-y + 12 = 4 x
-(-4) + 12 = 4 x combine your numbers<u>
</u> <u> 16 </u> = <u>4 x </u> then divide by 4<u>
</u> 4 = x
So your solution is: x = 4 and y = -4 or this is also written (4, -4)
Does that work for you?
Answer:1.32 s
Step-by-step explanation:
Given
The initial height of ball H=2 m
Initial velocity u=5 m/s
Height of ball at any instant is given by

The ball will hit the ground when h=0

Answer:
B) 20
Step-by-step explanation:
2808 lb. / 140 lb. ≈ 20
Answer:
h=11
Step-by-step explanation:
divide:
132/12h
11h
Down payment
973,000×0.25=243,250
principle
973,000−243,250=729,750
interest
6,103.92×12×20−729,750=735,190.8
intangible tax
729,750×0.007=5,108.25
Total cost
243,250+729,750+735,190.8
+5,108.25=1,713,299.05