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3 years ago

17/10 - 2/5 = * Helpppp

Mathematics

1 answer:

uysha [10]3 years ago

8 0

17/10-(2/5x2/2)
17/10-4/10
=13/10

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A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at th

nasty-shy [4]

Answer:

(9.6, 25.7) is a 80% confidence interval for the average net change in a student's score after completing the course.

Step-by-step explanation:

We have n = 6, $\bar{x} = 17.6667$ and s = 13.3367. The confidence interval is given by

$\bar{x}\pm t_{\alpha/2}(\frac{s}{\sqrt{n}})$ where $t_{\alpha/2}$ is the $\alpha/2$ th quantile of the t distribution with n-1=5 degrees of freedom. As we want the 80% confidence interval, we have that $\alpha = 0.2$ and the confidence interval is $17.6667\pm t_{0.1}(\frac{13.3367}{\sqrt{6}})$ where $t_{0.1}$ is the 10th quantile of the t distribution with 5 df, i.e., $t_{0.1} = -1.4759$ . Then, we have $17.6667\pm (1.4759)(\frac{13.3367}{\sqrt{6}})$ and the 80% confidence interval is given by (9.6, 25.7)

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3 years ago

Which function has two x-intercepts, one at (0, 0) and one at (4, 0)? f(x) = x(x − 4) f(x) = x(x + 4) f(x) = (x − 4)(x − 4) f(x)

Fofino [41]

If you want a polynomial to have the x-intercepts of your choice, you simply have to build a polynomial by multiplying pieces like $(x-x_k)$ where $x_k$ is the x-intercept you want.

So, if you want x-intercepts 0 and 4, you have to build the polynomial

$(x-0)(x-4) = x(x-4)$

5 0

3 years ago

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Select the correct answer from each drop-down menu.

Pepsi [2]

Answer:

x = 63°

y = 45°

z = 72°

Step-by-step explanation:

<u>Points to remember</u>

1). Opposite angles of a parallelogram are equal

2). Adjacent angles of a parallelogram are supplementary

3). Sum of angles of a triangle is 180°

<u>To find the measures of given angles</u>

ABCD is parallelogram.

m<C = m<C = x = 63°

Consider triangle ABD

m<A + m< B + m<D = 180

x + 72 + y = 180

y = 180 - ( 72 + x) = 180 - 135

y = 45°

Also y + z + m<C = 180

45 + z + 63 = 180

z = 180 - 108

z = 72°

6 0

4 years ago

The hour hand of a clock moves from 3 to 8 o'clock through how many degrees does it move

liberstina [14]

There is a picture.
There 12 parts. Each one is 360/12=30°.
8-3=5 we have.
So, the angle will be 5*30=150°.

3 0

3 years ago

Arnold needs to simplify the expression below.

Lunna [17]

Answer:

0.5x7

Step-by-step explanation:

Assuming that the original expression is $4.3*3+ 11(8.2-0.5*7)-6$ , according to PEMDAS multiplication takes priority over addition and subtraction,, and therefore, from the choices given, 0.5 * 7 must be performed first.

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3 years ago

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