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just olya [345]
2 years ago
13

I NEED HELP ASAP IN ON TIMER!!!!

Mathematics
1 answer:
Rina8888 [55]2 years ago
8 0

Answer:

A: square the binomial (x + 3), distribute the negative to the binomial (x2 + 9), simplify the dividend, and then divide

Step-by-step explanation:

I just took the test

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Determine the numerical length of JK.​
Zarrin [17]

Answer:

30

So the two sectors add to the full length:

JK + IJ = IK

x+6 + 9 = 2x

Rearrange:

x=15

So the numerical length:

2x

2*15

30

5 0
3 years ago
Read 2 more answers
A random sample of 102 full-grown lobsters had a mean weight of 16 ounces and a standard deviation of 3.4 ounces. Construct a 98
pshichka [43]

Answer:

The best point estimate for a confidence interval estimating the population μ is 16 ounces.

The 98 percent confidence interval for the population mean μ is between 15.21 ounces and 16.79 ounces.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The best point estimate for a confidence interval estimating the population μ is

The sample mean, so 16 ounces.

T interval

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 102 - 1 = 101

98% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 101 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.98}{2} = 0.99. So we have T = 2.36

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.36\frac{3.4}{\sqrt{102}} = 0.79

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 16 - 0.79 = 15.21 ounces

The upper end of the interval is the sample mean added to M. So it is 16 + 0.79 = 16.79 ounces

The 98 percent confidence interval for the population mean μ is between 15.21 ounces and 16.79 ounces.

4 0
2 years ago
Find the new cost including Sales Tax:<br> $99 headphones; 5% tax
rjkz [21]

Answer:

103.95

Step-by-step explanation:

99×5/100=4.95

99+4.95=103.95

6 0
2 years ago
Find the value of the combination. 7 C 2<br><br><br> a.21<br><br> b.42<br><br> c.49
astraxan [27]
My guess would probably be A = 21
8 0
3 years ago
Graph x&gt;2<br> Please helppp
Sholpan [36]
Answer: Bottom right. The one with the dashed line and it’s shaded to the right.
Hope this helps
7 0
2 years ago
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