Answer: 11
Concept:
Here, we need to understand the idea of evaluation.
When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.
Solve:
<u>Given information</u>
x = -3
<u>Given expression</u>
2x² + 2x - 1
<u>Substitute values into the expression</u>
=2(-3)² + 2(-3) - 1
<u>Simplify exponents</u>
=2(9) + 2(-3) - 1
<u>Simplify by multiplication</u>
=18 - 6 - 1
<u>Simplify by subtraction</u>
=12 - 1
=
Hope this helps!! :)
Please let me know if you have any questions
Consider the fraction .
1. You can see that the denominator 4k+28 can be simplified to expression 4(k+7), because 4k=4·k and 28=4·7, so using the distributive property you can write that 4k+28=4(k+7).
2. Then the initial fraction becomes .
3. The nominator and the denominator have the common divisor k+7, then you can divide top and bottom by k+7:.
Answer:
Answer:
4.1 in
Step-by-step explanation:
now we multiply pi and 10.71- i left it in the hundreths
place when i get my final answer ill round it to the tenths)
, we need the
alone so we now dive with 33. 62 on both sides, elimenating the 33.62. Now 751/ 33.62= 16.98.
now we square root it
= 4.12 which rounded is 4.1
Given :
Heather spend 2/7 of her money buying presents.
She then had €48.65 left.
To Find :
The initial amount of money she had.
Solution :
Let, initial amount she had is €x.
So,
x = €68.11
Therefore, initially he had €68.11 .