Multiply 2x+3y=-1 by 5 and 3x-5y=10 by 3
3y*5=15y and -5y*3=-15y
Add -15y and 15y you have no y values left.
Your main focus is going to be on the y values. What can you multiply each y value by to get the same number so that when you add the positive and negative you get 0.
4+3x = (k+2)x + 8
4+2+3x = (k+2)x + 8 - 2
6+3x = (k+2)x + 6
then 3x = k+2
so k = 3X-2
Answer:
I believe the acceleration is 3.66666666667 m/s
Step-by-step explanation:
Acceleration formula: a = vf - vi / t
Initial velocity: 0 (I believe it was 0, as it wasn't moving in the beginning)
Final velocity: 55 m/s
Time: 15 s
Substituting values: 3.66666666667 = 55 - 0 / 15
Answer: Meghan spent $687.5 per year.
Step-by-step explanation:
Let x represent the amount of money that Scott spends per year for auto insurance.
Meghan spends 25% more each year for auto insurance than Scott. The value of 25% of the amount that Scott spends per year is
25/100 × x = 0.25 × x = 0.25x
Therefore, the amount that Meghan spends would be
x + 0.25x = 1.25x
If the amount that they spent together is $1237.50 per year, it means that
x + 1.25x = 1237.5
2.25x = 1237.5
x = 1237.5/2.25
x = 550
The amount that Meghan spent per year would be
1.25 × 550 = 687.5
Answer: $14.4
Step-by-step explanation:
To calculate the tip, you need to multiply the bill times .2. So 72x .2 = 14.4
