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Ratling [72]
3 years ago
11

Evaluate this expression: 3x + 9x -5

Mathematics
1 answer:
Margarita [4]3 years ago
5 0

Answer:

12x - 5

Step-by-step explanation:

3x + 9x - 5 can be easily simplified by combining like terms.

3x and 9x are like terms because they both contain the same variable and the same exponent (understood to be 1).

Therefore, because an addition sign separates the two terms, it is expected of you to add the two together. To do this, just add the terms together as you would any other terms.

3x + 9x = 12x

Because the 5 is the only constant in the equation, it cannot be combined with anything else.

The simplified expression is 12x - 5.

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What is the coefficient for 5x + 3 = 18
erik [133]

Answer: 5

Step-by-step explanation: Let's go over a little algebra terminology.

The number in front of your variable is called your coefficient and a variable is just a letter that represents any number.

So here, your coefficient is 5 since it appears in front of the variable, x.

8 0
4 years ago
Read 2 more answers
Write the mixed number as a fraction 4 1/3, 1 2/5, 3 2/3
nasty-shy [4]
To get they total number of the fraction, you first times the bottom,  by the number one the side of the mixed number, and then add the top number to the answer. so for the first one, 3*4 = 12 + 1 = 13 so the answer is 13/3, for the next one, 5*1 = 5 + 2 = 7, so the answer is 7/5, and for the last one, 3*3 = 9 + 2 = 11, so the answer is 11/3                                                                                      so if your to lazy to read this the answers are                                                        1. 13/3                                                                                                                2. 7/5                                                                                                                  3. 11/3
5 0
3 years ago
What is the value of the expression below when y = 3?<br> 10y - 8
ycow [4]

Answer:

<h2>22</h2>

Step-by-step explanation:

<h3>Given, y = 3 </h3>

substitute this value in given expression

<em>=> 10y - 8</em>

<em>=</em><em>></em><em> </em><em>1</em><em>0</em><em>(</em><em>3</em><em>)</em><em> </em><em>-</em><em> </em><em>8</em><em> </em>

<em>=</em><em>></em><em> </em><em>3</em><em>0</em><em> </em><em>-</em><em> </em><em>8</em><em> </em>

<em>=</em><em>></em><em> </em><em>2</em><em>2</em><em>.</em><em>.</em><em>.</em><em>ans</em>

<h2>HOPE IT HELPS U!!!!</h2>
3 0
3 years ago
Rewrite the fraction in the sentence below as a percentage 21/25
Paul [167]
21/25


Change to decimal:-

Divide numerator by denominator.


21/25

21 ÷ 25 = 0.84

21/25 = 0.84

Change to a percentage:-

0.84 × 100 = 84

21/25 = 0.84 = 84%
6 0
3 years ago
Suppose y = 2x + 1 , where x and y are functions of t. (a) if dx/dt = 6, find dy/dt when x = 4. dy dt = (b) if dy/dt = 2, find d
evablogger [386]

y=2x+1\\\\\dfrac{dy}{dt}=2\dfrac{dx}{dt}

(a) For dx/dt=6, dy/dt = 2·6 = 12

(b) For dy/dt=2, 2 = 2·dx/dt ⇒ dx/dt = 1

_____

The value of x is irrelevant for this question.

=====

If your function is 2^x +1 or 2^(x +1), it needs to be written as such. The answer above applies to the function given.

7 0
3 years ago
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