Answer:
8125, im pretty sure this is right
Step-by-step explanation:
Answer:
4. The y would be 9
5. The x-int would be 1.5
Step-by-step explanation:
First term t(1)=(x-y)
common ratio =(x+y) (don't omit the parentheses)
then the nth term:
t(n)=(x-y)(x+y)^(n-1)
check:
t(1)=(x-y)(x+y)^(1-1)=(x-y)(x+y)^0=(x-y)(1)=(x-y)
t(3)=(x-y)(x+y)^(3-1)=(x-y)(x+y)^2
When n is small, t(n) can also be found by repeated multiplication of the common ratio (x+y)
The student made error in step 2 because negative multiplied by positive is negative. Also negative multiplied by negative is positive
X + y = 1.....multiply by -1
4x + y = -23
---------------
-x - y = -1 (result of multiplying by -1)
4x + y = -23
---------------add
3x = - 24
x = -24/3
x = -8 <====
x + y = 1
-8 + y = 1
y = 1 + 8
y = 9 <====
