Answer: 9y + 7 = y
Explanation:
The phrase, "nine times a number y" is "9y" in the form of an equation. When any term is by a number, they are meant to be multiplied together. So, "9y" means "9 times y".
The phrase, "plus seven" simply means to add seven.
The phrase, "equal to number y" is "= y" because "number y" refers to that term.
And so, all together, you get 9y + 7 = y.
(Brainliest would be appreciated)
I hope this helped!
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Ans: (3, infinity)
Hope this can help.
As it is reduced by 10%, £810 is 90% of the original cost.
So you do (810 / 90) x 100 = £900
50 / 100 = .5
.5 is 1% of 50
.5 * 20 = 10
Does that help?
Answer: 1, -1
Step-by-step explanation: This is a difference of squares when factored,
(x+1)(x-1)
Let's check using FOIL(First, outside, inside, last)
x * x =x^2
1 *x =x
x * (-1) =-x
1* -1 =-1
so x^2 +x -x -1
=x^2 -1