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bearhunter [10]
3 years ago
7

Simplify the expression below. 9x + 10 - 2x + 1

Mathematics
2 answers:
yaroslaw [1]3 years ago
7 0

Answer:

Step-by-step explanation: 9x + 10 - 2x +1=

9x + (-2x) +10+1 =

7x + 11

Leokris [45]3 years ago
6 0

Answer:

7x+11

Step-by-step explanation:

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Subtract. 5x^2-5x+1-(2x^2+9x-6)
Talja [164]
<h2>Hello!</h2>

The answer is:

3x^{2} -14x+7

<h2>Why?</h2>

To solve the problem we need to add/subtract like terms. We need to remember that like terms are the terms that share the same variable and the same exponent.

For example, we have:

x^{2} +2x+3x=x^{2} +(2x+3x)=x^{2}+5x

We have that we were able to add just the terms that were sharing the same variable and exponenr (x for this case).

So, we are given the expression:

5x^2-5x+1-(2x^2+9x-6)=5x^{2}-2x^{2}-5x-9x+1-(-6)\\\\(5x^{2}-2x^{2})+(-5x-9x)+(1-(-6))=3x^{2}-14x+7

Hence, the answer is:

3x^{2} -14x+7

Have a nice day!

4 0
3 years ago
A rectangular book measures 18 x 9. What is the length of its diagonal? Round your answer to the nearest tenth
avanturin [10]

Answer:

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Step-by-step explanation:

First draw the box with the diagonal, as you can see it is split into 2 equal right triangles. Now use the pythagorean theorem (a^2+b^2=c^2) to find the length of the diagonal

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3 years ago
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Harry buys a wand for $12.50 plus 8% tax. Ron buys his sister a diary for $13 plus 8% tax. Write the sum, in dollars, that Harry
Tanya [424]

9514 1404 393

Answer:

  $27.54

Step-by-step explanation:

The straightforward way to do this is to compute the tax and total on each amount, then add those together. There is an easier way.

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Together, Ron and Harry paid a total of $27.54.

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Answer:

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Step-by-step explanation:

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