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4 years ago

(100% + 100% + x) =x 300%

2 answers:

7 0

100% is your answer
Because if you do the left hand of the Equals it is 200% and then you look at the difference of the two numbers or do 300-200=100

Elena L [17]4 years ago

3 0

if x equals 100 then the answer will be 100 because if you multiply 100 by 3 you will get 300

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Gelneren [198K]

I believe this is the answer

7 0

3 years ago

Brainliest + 20 pts to whoever helps pls!!

Blizzard [7]

Answer:

Correct option is (a). 60.391 and 101.879; because the test statistic is in a critical region, the test rejects the null hypothesis.

Step-by-step explanation:

A Chi-square test for population variance is used to perform this test.

The standard deviation is, 2.0 minutes.

Then the variance is, 4.0 minutes.

The hypothesis for this test is:

H₀: The population variance of all commute times is equal to 4.0 minutes, i.e. σ² = 4.

Hₐ: The population variance of all commute times is not equal to 4.0 minutes, i.e. σ² ≠ 4.

The test statistic is:

$\chi^{2}_{calc.}=\frac{(n-1)s^{2}}{\sigma^{2}}$

The critical region of this test is defined as:

Reject H₀ if $\chi^{2}_{calc.}$ or $\chi^{2}_{calc.}>\chi^{2}_{(1-\alpha /2), (n-1)}$ .

The degrees of freedom is:

$n-1=81-1=80$

Compute the critical from a Chi-square table.

$\chi^{2}_{\alpha /2, (n-1)}=\chi^{2}_{0.05, 80}=101.879\\\chi^{2}_{(1-\alpha /2), (n-1)}=\chi^{2}_{0.95, 80}=60.391\\$

The test statistic value is, $\chi^{2}_{calc.}=105.8$ .

$\chi^{2}_{calc.}=105.8 > \chi^{2}_{0.05, 80}=101.879$

The null hypothesis is rejected because the test statistic is in the critical region.

Thus, the correct option is (a).

6 0

3 years ago

Samuel has a hamster cage that is a rectangular prism. It is 20 1/2 inches long, 12 inches

AleksandrR [38]

Answer:

Step-by-step explanation:

Volume= length × width × height.... Volume= 20 1/2 × 12 × 10 1/4..... Volume= 2521 1/2 cubic inches or 2521.5 cubic inches

6 0

3 years ago

What are the common factors of 207 and 184

S_A_V [24]

184: 2 2 2 23
207: 3 3 23
GCF: 23

8 0

3 years ago

The ancient Greeks required a straightedge and protractor to construct a perpendicular bisector for a given line segment

Elena L [17]

Answer:

False

Step-by-step explanation:

The ancient Greeks had lots of scientists and mathematicians which formulated theory still in use today. They include Archimedes principle, Pythagoras theorem etc.

The ancient Greeks required the use of a straightedge and compass instead of a straightedge and protractor in the construction of a perpendicular bisector for a given line segment.

5 0

3 years ago