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bearhunter [10]
3 years ago
9

How many terms are in the expression below? 5x +3 - 3x – 1 + 2x + 5

Mathematics
1 answer:
marin [14]3 years ago
5 0

Answer:

2

Step-by-step explanation:

5x + 3 - 3x - 1 + 2x + 5

you can combine the like terms

5x - 3x + 2x = 4x

3 - 1 + 5 = 7

4x + 7

there are 2 terms in the expression

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The number of blocks will be the hypotenuse of this right angle:

I NORTH
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8²+6²= 100 & North-East =√100  = 10 blocks
3 0
3 years ago
A survey of 85 families showed that 36 owned at least one DVD player. Find the 99% confidence interval estimate of the true prop
attashe74 [19]

Answer:

0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286

0.424 + 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.562

The 99% confidence interval would be given by (0.286;0.562)

Step-by-step explanation:

Information given:

X= 36 represent the families owned at least one DVD player

n= 85 represent the total number of families

\hat p=\frac{36}{85}= 0.424 represent the estimated proportion of families owned at least one DVD player

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.05. And the critical value would be given by:

z_{\alpha/2}=-2.58, z_{1-\alpha/2}=2.58

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

If we replace the values obtained we got:

0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286

0.424 + 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.562

The 99% confidence interval would be given by (0.286;0.562)

8 0
3 years ago
Which is the ratio 12 to 27 expressed as a fraction in lowest terms
raketka [301]

Answer:

4/9

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
The volleyball team raised $350 from its fundraiser. It wants to buy jerseys and volleyballs. The jerseys cost $12 each, and the
uysha [10]
You have to set up an equation so 12 x 22 + 15v=
5 0
3 years ago
Read 2 more answers
Guided Practice
Alla [95]

Answer:

Answer:

C. 5

Step-by-step explanation:

3x – 7 > – 1

Add 7 to each side

3x – 7+7 > – 1+7

3x> 6

Divide each side by 3

3x/3 >6/3

x >2

X must be greater than 2

Step-by-step explanation:

igoroleshko156

Genius

2K answers

3.1M people helped

Answer:

Step-by-step explanation:

Step 1:  Subtract 7 from both sides

Step 2:  Divide both sides by -3

Since you divided by a negative, you must flip the sign.

Answer:  x<2

4 0
2 years ago
Read 2 more answers
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