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DiKsa [7]
3 years ago
15

PLZ HELP IVE BEEN STUCK ON THIS QUESTION​

Mathematics
1 answer:
o-na [289]3 years ago
7 0

Answer:

A= 16

B=?

Step-by-step explanation: srry about the second one im also confused but i tried my best.

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A plane is a set of ____ on a flat surface that extends forever
enot [183]

Answer:

D.

Step-by-step explanation:

None of the above because I believe that it is <em>points</em>

6 0
3 years ago
Sierra buys lunch in the cafeteria everyday. Lunch costs $2.00 each day, how much did she spend after 5 days.
Tcecarenko [31]

Answer:

$2.00 each day so $2.00 x 5 = $10

4 0
1 year ago
What is the solution and the inequality ?
Nikolay [14]
Inequality : 19.50n+24≤$110

Solution: Alyssa can buy 4 DVDs

Work: 110-24=86
           86/19.50 = 4.4

You can't have a fraction of a DVD, so you have to round down to 4. 
4 0
2 years ago
A sample of 38 observations is selected from one population with a population standard deviation of 3.4. The sample mean is 100.
kaheart [24]

Answer:

a. two-tailed test

b. reject H0 if Z>1.96 or Z<-1.96

c. Z = 1.73

d. we have failed to reject the null hypothesis

e. P-value = 0.0418

Step-by-step explanation:

We will use a Z test to resolve this, an it will be a two-tailed test because the hypothesis statements are not indicating a specific direction for the significant difference (H0 : μ1 = μ2 ; H1 : μ1 ≠ μ2), this also means that the significanclevel will be divided between the both tails (2.5% en each tail for the rejection regions). See attached drawing for reference.

We need to find our critical value:

Zα/2 = Z(0.05/2) = 0.025

If we look for 0.025 in a Z table we will find that the critical value is 1.96 to the right, and by symmetry -1.96 to the left. So our decision rule will be to reject H0 if Z>1.96 or Z<-1.96

The Z test will be done using the next equation:

Z = (x⁻1 - x⁻2) - (μ1 - μ2) / √( σ²1/n1 + σ²2/n2

Because we are testing the null hypothesis we know that μ1 - μ2 must be zero if they are supposed to be equal (H0 : μ1 = μ2), so we calculate as follows:

Z = (100.5 - 98.8) - (0) / √( (3.4)²/38 + (5.8)²/51 = 1.7/0.9817 = 1.73

Z<1.96, therefore we have failed to reject the null hypothesis

The P-value for this test would be represented by the probability of Z being greater than 1.73, so we can look for it in any Z table, finding that its value is 0.0418, and because P-value>0.025 we again confirm that we don't have evidence statistically significant to reject the null hypothesis

4 0
3 years ago
Help Me Please I will give brainliest if correct!
il63 [147K]

Answer:

9c^{7}

Step-by-step explanation:

c^{-4} is equal to \frac{1}{c^{4} }. \frac{9c^{3} }{\frac{1}{c^{4} } } is equal to 9c^{7}.

3 0
2 years ago
Read 2 more answers
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