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2 years ago

Simplify 3x + 5 + 7 x - 3 - x + 2

Mathematics

2 answers:

stira [4]2 years ago

8 0

Before we do this problem, let's go over a little algebra terminology.

The number in front of your variable is called your <em>coefficient </em>and notice that the <em>x</em> at the end of the problem does not have a coefficient.

When that happens, when there is no number in front of your variable, you can put a 1 there to fill that position. So -x can be thought of as -1x.

Next let's change all our minus signs to plus negatives.

So the problem reads 3x + 5 + 7x + -3 + -1x + 2.

Now let's simplify this by combining like terms.

We can combine our "x" terms first.

3x + 7x + -1x simplifies to +9x.

Now, 5 + -3 + 2 simplifies to 4.

So our answer is 9x + 4.

vitfil [10]2 years ago

5 0

Answer:

10x-x+7-3

Step-by-step explanation:

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Please help!!!! worth 50 points!

Verdich [7]

Answer:3

Step-by-step explanation:

Scale factor=9/3=3

4 0

3 years ago

Read 2 more answers

I need help with this, please!

siniylev [52]

Answer:

The answer to your question is None of the options, the answer is y ≥ 1

Step-by-step explanation:

Inequality

5 - 3 (y + 2) ≤ 6y - 10

1.- Expand

5 - 3y - 6 ≤ 6y - 10

2.- Simplify like terms

-3y - 1 ≤ 6y - 10

3.- Add -6y in both sides

- 3y - 6y - 1 ≤ 6y - 10 - 6y

4.- Simplify

-9y - 1 ≤ -10

5.- Add 1 in both sides

-9y - 1 + 1 ≤ -10 + 1

6.- Simplify

-9y ≤ -9

7.- Divide both sides by -9 and change ≤ by ≥

-9/-9 y ≥ -9/-9

8.- Simplify

y ≥ 1

3 0

2 years ago

What is the slope of the line that contains these points? x- 31, 36,41,46 y- 10,8,6,4

Ann [662]

$- \frac{2}{5}$

5 0

2 years ago

The average score of all golfers for a particular course has a mean of 61 and a standard deviation of 3.5 . Suppose 49 golfers p

Nadya [2.5K]

Answer:

The probability that the average score of the 49 golfers exceeded 62 is 0.3897

Step-by-step explanation:

The average score of all golfers for a particular course has a mean of 61 and a standard deviation of 3.5

$\mu = 61$

$\sigma = 3.5$

We are supposed to find he probability that the average score of the 49 golfers exceeded 62.

Formula : $Z=\frac{x-\mu}{\sigma}$

$Z=\frac{62-61}{3.5}$

$Z=0.285$

Refer the z table for p value

p value = 0.6103

P(x>62)=1-P(x<62)=1-0.6103=0.3897

Hence the probability that the average score of the 49 golfers exceeded 62 is 0.3897

7 0

3 years ago

A study conducted at a certain college shows that 65% of the school's graduates find a job in their chosen field within a year

alexdok [17]

Answer: 0.009

Step-by-step explanation:

Formula we use here : Binomial distribution formula

Probability of getting success sin x trial = $P(X)=^nC_xp^x(1-p)^{n-x}$ , where n is the sample size and p is the probability of success in each trial .

Given : A study conducted at a certain college shows that 65% of the school's graduates find a job in their chosen field within a year after graduation.

i.e. p= 0.65

Sample size : n= 11

Now, the probability that 11 randomly selected graduates all find jobs in their chosen field within a year of graduating:-

$P(X)=^{11}C_{11}(0.65)^{11}(1-0.65)^{11-11}\\\\=(1)(0.65)^{11}(1)\\\\=0.00875078317401\approx0.009$

Hence, the probability that 11 randomly selected graduates all find jobs in their chosen field within a year of graduating = 0.009

8 0

3 years ago

Simplify 3x + 5 + 7 x - 3 - x + 2​

Simplify 3x + 5 + 7 x - 3 - x + 2