Answer:
what is the question asking?
3 divided by 5/8 equals 4 4/5.
1. 5^-12<span> because a^m * a^n = a^m+n</span>
2. 10<span> because a^m / a^n = a^m-n</span>
3. -3 because ( a^n)^m = a^n*m
<span>4. (5^-6 * 5^2) / 5^-4 = 5^-4 / 5^-8 = 5^-4+8 = </span>5^4
<span>5. 5^8 / ( 5^-4)^-3 = 5^8 / 5^12 = 5^8-12 = </span>5^-4
4x + 8y = 20
- 4x + 2y = -30
find y first
in order to find y eliminate x
add the two equations together
4x+-4x+8y+2y= 20+-30
4x-4x+8y+2y= 20-30
10y= -10
divide both sides by 10 to get y by itself
10y/10= -10/10
y= -1
find x by using the substitution method
- 4x + 2y = -30
-4x+2(-1)=-30
-4x-2= -30
move -2 to the other side
sign changes from -2 to +2
-4x-2+2= -30+2
-4x= -28
divide both sides by -4
-4x/-4= -28/-4
x= 7
answer:
(7,-1)
Answer:
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