2x - 3y = 7 and -3x + y = 7..multiply Equation 2 by THREE and add to Equation 1
-9x + 3y = 21...........................watch the y's disappear
-7x........ = 28
x = -4
substitute -4 instead of x in either of the ORIGINAL equations
2x - 3y = 7
2(-4) - 3y = 7
-8 -3y = 7..........add 8 to both sides
-3y = 15
y = -5
im not sure
Answer:
400%
Step-by-step explanation:
Original wieght = 12
New weight = 60
Change = 60- 12= 48
Change percent = change / original x 100 = 48 / 12 x 100 = 400 %
I hope its right!!!! :)
Answer: $835.88
Step-by-step explanation:
SP after 7% sales tax = 543.32
SP = MP (100 - d) / 100
543.32 = MP (100 - 35) / 100
543.32 = 0.65MP
MP = 835.88
If My math is right I think that the correct answer is C.
Answer:
6/8 simplified form 3/4
Step-by-step explanation:
Given: 3/8 + 1/8 + 2/8
Here we have to find the sum of the fractions.
All the fractions are like fractions.
So we can add the numerators and keep the denominator as it is. (We should not add the denominator)
Therefore,
3/8 + 1/8 + 2/8 = (3 + 1 + 2)/8
= 6/8
We can simplify this fraction by dividing both the numerator and the denominator by 2.
= 6/8
= 3/4
Hope this is will help you to understand the concept.
Thank you.
