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Harlamova29_29 [7]

3 years ago

5

For the equation, y = -4X - 5, tell whether it's graph passes through the first quadrant. Explain how you know

2 answers:

maks197457 [2]3 years ago

4 0

it does not pass through quadrant I.

Both the slope and Y value are negative.

Meaning this equation goes up to the left and down right.

(you can use a graphing calculator (if you have one.) and plug this equation into the GRAPH.) It will show you the line.

Alina [70]3 years ago

3 0

It doesn't passes because:

1) It has a negative gradient
2) It has a y-intercept of -5

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A study is done to find the 95% confidence interval for the difference in means between the ACT scores between two schools in a

Kitty [74]

Solution :

95% confidence interval for the difference between the means of ACT scores between two schools, is given by :

$[(\overline X_1 - \overline X_2)-ME, (\overline X_1 - \overline X_2)+ME]$

$\overline X_1 = 25.90 , \ \ \ \overline X_2 = 27.70$

$S_1=3.49, \ \ \ S_2 = 2.47$

$n_1=39, \ \ n_2=37$

M.E. , Margin of error,

$=t_{n_1+n_2-2,0.025} \times \left( s \sqrt{\frac{1}{n_1}+\frac{1}{n_2}}$

$s^2 = \frac{(n_1-1)S_1^2+(n_2-1)S^2_2}{n_1+n_2-2}$

$=\frac{38(3.49)^2+36(2.47)^2}{39+37-2}$

= 9.222

s = 3.03

$t_{74,0.05} = 1.99$

$M.E. = 1.99 \times 3.03 \times \sqrt{\frac{1}{39}+\frac{1}{37}}$

= 1.4

Therefore, 95% CI = [(25.90-27.70) - 1.4 , (25.90-27.70) + 1.4]

= [-3.2, -0.4]

Therefore, the lower bound is -3.2

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2 years ago

F f(x) = 2x2 + 1 and g(x) = x2 – 7, find (f + g)(x).

shutvik [7]

2x2 + 1 + <span> x2 – 7
= 3x2 - 6

answer is </span><span>C. 3x2 – 6</span>

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The scientific notation of .2 is
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