Answer:
x = 3
Step-by-step explanation:
5x - 3 + 2x = 5x + 3
<em>subtract 5x from both sides</em>
5x - 5x - 3 + 2x = 5x - 5x + 3
-3 + 2x = 3
<em>add 3 to both sides</em>
-3 + 3 + 2x = 3 + 3
2x = 6
<em>divide both sides by 2</em>
2x/2 = 6/2
x = 6/2
x = 3
70 mL=25% alcohol
?mL=90% alcohol
90×70÷25
=252 mL
I think do like this....I'm not sure
Hope this help you
Answer:
7 and 8, since the square root of 54 is approximately 7.35
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Answer: y= -4x-2
Step-by-step explanation:
glad i could help!
Answer: f(-2) = 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>
f (-2) or x = -2
<u>Given function</u>
f(x) = -x² - 10x - 13
<u>Substitute values into the function</u>
f(-2) = -(-2)² - 10 (-2) - 13
<u>Simplify exponents</u>
f(-2) = -(4) - 10 (-2) - 13
<u>Simplify by multiplication</u>
f(-2) = 4 + 20 - 13
<u>Simplify by addition/subtraction</u>
f(-2) = 24 - 13
f(-2) = 
Hope this helps!! :)
Please let me know if you have any questions