Help please!! I have no idea what I’m doing
1 answer:
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Answer:
13 is the number.
Step-by-step explanation:
Given:
Twice the difference of a number and 9 equals 8.
Let the unknown number be 'x'.
Therefore, as per question:
The difference of 'x' and 9 =
Twice the difference means 2 times the difference. So, we multiply 2 to the difference. Therefore,
Now, the above expression is equal to 8. So, we equate the above expression to 8. This gives,
Solving for 'x', we get:
Using distributive property of addition and distributing 2 inside the bracket. This gives,
Therefore, the unknown number is 13.
Now, we can verify our answer.
Therefore, the answer is correct.
Answer:
1) Solving the term using F.O.I.L we get
2) solving the term using F.O.I.L we get
3) Solving using square of binomial we get
4) Solving using square of binomial we get
Step-by-step explanation:
1) (3x + 5)(2x - 3). Solve using the F.O.I.L.
F.O.I.L stands for First, Outer Inner Last
We have
First: 3x(2x)
Outer: 3x(-3)
Inner: 5(2x)
Last: 5(-3)
Solving we get:
So, solving the term using F.O.I.L we get
2) (x + 2)(x – 13). Solve using the F.O.I.L.
F.O.I.L stands for First, Outer Inner Last
We have
First: x(x)
Outer: x(-13)
Inner: 2(x)
Last: 2(-13)
Solving we get:
So, solving the term using F.O.I.L we get
3) (x + 5)^2. Solve using the square of Binomial.
The square of binomial is:
Solving:
So, solving using square of binomial we get
4) (x -3)^2. Solve using the square of Binomial.
The square of binomial used is:
Solving:
So, solving using square of binomial we get