5x + 2y = 22
10x + 9y = 59
so now we need to either eliminate the y or the x and we need to multiply both numbers by something so that they will be the same and we can add or minus them.
so here I will eliminate x because it's easier
we multiply the top equation by 2 and the bottom equation by 1 and we get
10x + 4y = 44
10x + 9y = 59
so now we can see that the number of x's are the same and we can just find the DIFFERENCE between the two equations if it was -10x and 10x we would ADD
= 5y = 15
notice that the x'a have cancelled each other out
now we divide both sides by 5 so
y=3
now we have y, we need to substitute it into one of the original equations, doesn't matter which one. I'm going to do the first one.
5x + 2y = 22
5x + 2(3)=22
5x + 6 = 22
now minus 6 from both sides
5x = 16
divide both sides by 5
x = 3.2
we have our answers but to be sure we need to just substitute the values for x and y into BOTH original equations.
5x + 2y = 22
= 16 + 6 = 22
10x + 9y = 59
= 32 + 27 =59
Tadaa!! and there you have it
y = 3
x = 3.2
hope this helped :)
#1 is b and #2 is also b ,, i think..so sorry if i’m wrong!
Answer:
7
Step-by-step explanation:
First, subtract 7 from 25. Then divide the answer by 2.5. You get 7 as your answer :)
Answer: 6.
We found the factors and prime factorization of 18 and 24. The biggest common factor number is the GCF number.
Answer:
interest is $105
total is $455
Step-by-step explanation:
350 * .03 = 10.5
10.5*10 = 105
interest is 105
350 +105 = 455
