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SashulF [63]
3 years ago
6

20×+12>14×+30 A. ×<3 B.×<7 C.×>7 D.×>3

Mathematics
1 answer:
faust18 [17]3 years ago
3 0
20x+12>14x+30
20x-14x>30-12
6x>18
x>3
D.x>3
brainliest pls!
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Drag the dots to plot (7 1/2, -2) (-3,7) and (2,0)
kirill115 [55]

Step-by-step explanation:

7 1/2 = 7 + 1/2 = 14/2 + 1/2 = 15/2 = 7.5

check the attached picture.

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4 0
3 years ago
In a simple regression analysis for a given data set, if the null hypothesis β = 0 is rejected, then the null hypothesis ρ = 0 i
kati45 [8]

Answer:

Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0

The statistic to check the hypothesis is given by:

t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}

And is distributed with n-2 degrees of freedom

And the statistic to check the significance of a coeffcient in a regression is given by:

t_1 = \frac{\hat{\beta_1} -0}{S.E (\hat{\beta_1})}

For this case is importantto remember that t1 and p value for test of slope coefficient is the same test statistic and p value for the correlation test so then the answer would be:

Always

Step-by-step explanation:

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0

The statistic to check the hypothesis is given by:

t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}

And is distributed with n-2 degrees of freedom

And the statistic to check the significance of a coeffcient in a regression is given by:

t_1 = \frac{\hat{\beta_1} -0}{S.E (\hat{\beta_1})}

For this case is importantto remember that t1 and p value for test of slope coefficient is the same test statistic and p value for the correlation test so then the answer would be:

Always

4 0
2 years ago
a dolphin is swimming 18 feet below the surface of the ocean. there is a coast guard helicopter 75.5 feet above the surface of t
Sever21 [200]

Answer:

93.5

Step-by-step explanation:

I think because u would take -18 -18 + 75.5.

can I have brainlist please.

6 0
2 years ago
Can some one please help me , I need to get This correct :))
IRISSAK [1]

Answer:

C

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Wouk out (-5) + (-2)​
PolarNik [594]

Answer:

-7

Step-by-step explanation:

-5   +    -2   =     is the same as -5  -   (+2), so the answer is -7

7 0
3 years ago
Read 2 more answers
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