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3 years ago

10

What is the value of y= 3x + 5 when x = -4?

1 answer:

blsea [12.9K]3 years ago

8 0

Answer:

y=-7

Step-by-step explanation:

y=3(-4)+5

y=-12+5

y=-7

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FOR WHICH POLYGON ARE BOTH x= -1 and y= -2 lines of symmetry? ILL BRAINLIEST YOU IF YOU GET IT RIGHT HELP ME PLZ

snow_lady [41]

Answer:

C

Step-by-step explanation:

The line of symmetry is a line that splits the figure into 2 halves where each half is a mirror image of the other. In the third figure, if a line is drawn through x = -1, the halves mirror each other. If a line is drawn through y = -2, the top and bottom halves mirror each other.

3 0

3 years ago

Find cos0, where 0 is the angle shown. Give an exact value, not a decimal approximation. (listing BRAINLEST)

marshall27 [118]

Step-by-step explanation:

everything can be found in the picture

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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:

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

<em>Hₐ</em>: The population variance of all commute times is not equal to 4.0 minutes, i.e. <em>σ² </em>≠ 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 <em>H₀</em> 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

In the united states the speed limit signs are in Miles per hour. Unfortunately, your speedometer only reads in km/hour. How man

ohaa [14]

Hello,

1mph = 1.60934kph

70 x 1.60934 = 112.6538

Answer:

70mph = 112.6538kph

8 0

3 years ago

Write the prime factorization of 375 and of 1000. How do u write that

aleksklad [387]

Answer:

375 = 3 · 5³

1000 = 2³ · 5³

Step-by-step explanation:

6 0

3 years ago