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amid [387]
2 years ago
12

9. Select one of the factors of 3x + 4x -4.

Mathematics
1 answer:
labwork [276]2 years ago
7 0

Answer:

hi

Step-by-step explanation:

mad

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What would x equal in this equation
KATRIN_1 [288]

Answer:

x = 15

Step-by-step explanation:

6/4 = 1.5

1.5*10 = 15

Check your work:

15/10 = 6/4 = 1.5

x = 15 is right

8 0
3 years ago
Your math grade is a 68%.You turn in some late work, and now your grade is an 82%.What is the percent change?
Alex

Answer:

your grade increased by 14%

7 0
2 years ago
line k has a slope of -5. line j is perpendicular to line k and passes though the point (5,9) create the equation for line j
Anna71 [15]

Answer:

y = 1/5x + 8

Step-by-step explanation:

The first thing you should know is that the slope of a perpendicular line is the opposite reciprocal. So, the slope of line j is 1/5. This is your current equation: y=1/5x + b. Plug in your coordinate to the equation, it should look like this: 9=1/5(5)+ b. 1/5 times 5 equals 1, so this is what it should look like: 9=1 + b. Subtract 1 from both sides to get 8 = b. Go back to your original equation and plug in 8 to b. This is your final equation: y = 1/5x + 8. Hope this helped!

3 0
3 years ago
Solve for r in terms of C
LUCKY_DIMON [66]

Answer:

C / ( 2 pi) = r

Step-by-step explanation:

C = 2 pi r

Divide each side by 2 pi

C /2 pi= 2 pi r / 2 pi

C / ( 2 pi) = r

4 0
3 years ago
Read 2 more answers
The U.S. Department of Education reported that in 2007, 67% of students enrolled in college or a trade school within 12 months o
MrRissso [65]

Answer:

a) The 90% confidence interval is 0.575\leq \pi\leq 0.701

b) The margin of error is 0.063.

Step-by-step explanation:

We have to construct a 90% confidence interval for the proportion of students enrolled in college or a trade school within 12 months of graduating from high school in 2013.

We have a sample of 160 students, and a proportion of:

p=X/N=102/160=0.6375

The standard deviation is:

\sigma=\sqrt{\frac{p(1-p)}{N}}=\sqrt{\frac{0.6375*0.3625}{160}}=0.038

As the sample size is big enough, we use the z-value as statistic. For a 90% CI, the z-value is z=1.645.

Then, the margin of error is:

E=z\cdot\sigma=1.645\cdot 0.038=0.063

Then, the 90% confidence interval is:

p-z\cdot \sigma\leq \pi\leq p+z\cdot\sigma\\\\0.638-0.063\leq \pi\leq 0.638+0.063\\\\0.575\leq \pi\leq 0.701

4 0
3 years ago
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