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zhuklara [117]
2 years ago
9

Simplify by subtracting 2 2 (x +3x-4)-(2x -5x+6)

Mathematics
1 answer:
exis [7]2 years ago
7 0

Answer:

=-x^2+8x-10

Step-by-step explanation:

\mathrm{Remove\:parentheses}:\quad \left(a\right)=a

=x^2+3x-4-\left(2x^2-5x+6\right)

Simplify.

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PROBLEM: Juan hires an electrician. Juan pays a one-time fee of $30. Juan also pays $45 for each hour the electrician works. A.
PolarNik [594]

Answer:

A: C=45h+30

B: C=$322.50

Step-by-step explanation:

A: We'll start with the equation for the total charge. Juan is saying he will pay a one time fee of $30, meaning there is 30 dollars added to what ever the hourly wage is. This can be represented by the +30. Now if "h" represents the variable for which the hourly wage will be calculated, and he pays $45 dollars per hour this will be represented as 45h. <em>As an example if I pay you 2 dollars per hour using the same variable "h", this would be represented as 2h. So if you worked for two hours you would get 4 dollars, this is proven by the fact the 2(2) (remeber im replacing the "h" with the hours you worked) obviously 2 times 2 is 4 proving my point. </em>This information will give you the equation you see above.

B: Onto solving for how much Juan will pay. Now you say youre supposed to have 9 answer but this can't be true. All you need to do is plug the hours given into "h" and solve the equation. It should look something like:

<u>C=45h+30</u>

<u>C=45(6.5)+30</u>

Im using a decimal because it should be clear 1/2=0.5

<u>C= 292.5+30</u>

45x6.5 always go with PEMDAS, we are multiplying first. Then add 292.5 plus 30

This results in the answer of:

<u>C=$322.50</u>

3 0
3 years ago
Find the social security tax deducted for each weekly pay check of $237
worty [1.4K]
14.69 in dollars and 6.2 percent 
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Which equation is y = 9x2 + 9x – 1 rewritten in vertex form?
Llana [10]

Answer:

1. y = 9(x+1/2)^2 -13/4

Step-by-step explanation:

y = 9x^2 + 9x – 1

first isolate the x terms

y = 9(x^2 +x) -1

then add 1/4 inside the brackets to make it a perfect square trinomial (half of the coefficient of the x term squared is how we get 1/4)

since we just added 1/4 we need to subtract what we just added to balance the equation. so 1/4 times 9 is 9/4 ( the number we just added to the equation). then you subtract 9/4 outside of the brackets.

y = 9(x^2 +x +1/4) -1 -9/4

then simplify

y = 9(x+1/2)^2 -13/4

6 0
3 years ago
hi how is your day hopes its good and stay safe remember to stay at home and if your going out stay 6 feet apart love you
oksian1 [2.3K]

Thank you love same with you! God bless

3 0
2 years ago
Read 2 more answers
Olivia is 48 inches tall, and 2/3 as tall as her brother Cameron. In inches, how tall is Cameron?
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Cameron is 72 inches tall.

48 x 3/2= 72 inches or 6 ft.

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