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kirill115 [55]
2 years ago
13

1 x2 + 7x + 12 = ________________________

Mathematics
1 answer:
Phantasy [73]2 years ago
7 0

Answer:

1. 9x +12

2.  -x = -10

3. x+25/2

4. 2 (x - 50)

5. 8x - 9

6. 32x - 21

7. 8x - 24

8. 2 (x - y)

9. x - 81/2

10. 72x - 200y

Step-by-step explanation:

hope this helps!! :)

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I don’t know but can you please help me out
5 0
2 years ago
In which quadrant does the ordered pair (5, -6) lie?
guajiro [1.7K]
The coordinate (5,-6) lies in the fourth coordinate, because the first is x positive y positive, the second is x negative and y positive, the third is x negative and y negative, and the fourth is x positive y negative. This is x positive y negative, so it is in the fourth quadrant.
5 0
3 years ago
Read 2 more answers
What is the value of 4p − 2, when p = 8
ddd [48]
If P=8, Then you would plug in 8 for P. 

4(8)-2 = 30 

Hope this helps :)
4 0
3 years ago
Read 2 more answers
If x > 0, which of the following is closest to the value of x that makes the equation below true? ( SHOW WORK )
Semenov [28]

Answer:am working on this to study guide

Step-by-step explanation:

5 0
3 years ago
In a random sample of 8 ​people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.2 minutes. A 95
Elina [12.6K]

Answer: Margin of error = 6.58

Confidence interval =  (26.91, 40.08)

Step-by-step explanation:

Since we have given that

Sample size n = 8

Sample mean = 33.5 minutes

Population standard deviation = 9.5 minutes

At 95% confidence interval,

α = 0.05

t = 1.96

So, Margin of error is given by

t\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{9.5}{\sqrt{8}}\\\\=6.58

Confidence interval would be

Lower limit:

\bar{x}-6.58\\\\=33.5-6.58\\\\=26.91

Upper limit:

\bar{x}+6.58\\\\=33.5+6.58\\\\=40.08

Hence, the interval would be (26.91, 40.08)

But at standard deviation 7.2 minutes, the confidence interval was (27.5, 39.5)

Confidence interval using the standard normal distribution is wider than the confidence interval using t distribution.

3 0
3 years ago
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