All categories

3 years ago

What is the exam score for an exam whose z-score is 1.25?

Mathematics

1 answer:

mojhsa [17]3 years ago

4 0

Answer:

Step-by-step explanation:

A z-score of 1.25 means that the actual exam score is 1.25 standard deviations above the mean, and therefore the exam score we are looking for is: mean + 1.25 * SD = 75 + 1.25 * 8 = 85

You might be interested in

The graphs of f(x) and g(x) are shown below:

rosijanka [135]

<h2>Answer:</h2>

Option: C is the correct answer.

C.) x = −3.8, 3

<h2>Step-by-step explanation:</h2>

The function f(x) is given by:

$f(x)=x^2-x-12$

and the function g(x) is given by:

$g(x)=-1.8x-0.6$

Now, we are asked to find the solution of the equation:

$f(x)=g(x)$

i.e. we have to find the value of x such that both the functions are equal i.e.

$x^2-x-12=-1.8x-0.6\\\\i.e.\\\\x^2-x+1.8x-12+0.6=0\\\\i.e.\\\\x^2+0.8x-11.4=0\\\\i.e.\\\\10x^2+8x-114=0\\\\i.e.\\\\5x^2+4x-57=0$

Now, on solving the equation using the quadratic formula i.e. the solution of the equation:

$ax^2+bx+c=0$

is given by:

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

Here we have:

$a=5,\ b=4\ and\ c=-57$

Hence, the solution is given by:

$x=\dfrac{-4\pm \sqrt{4^2-4\times 5\times (-57)}}{2\times 5}\\\\i.e.\\\\x=\dfrac{-4\pm \sqrt{16+1140}}{10}\\\\i.e.\\\\x=-3.8\ and\ x=3$

6 0

3 years ago

Convert 1.5 cubic meter to ______ cubic centimeters.

Vedmedyk [2.9K]

Answer:

1500000 cubic centimeters

6 0

2 years ago

Read 2 more answers

The ratio of boys and girls in the school musical is 5 to 8.Which of the following shows the possible numbers of boys and girls

Maurinko [17]

Answer:

I don't see the following ratios.

Step-by-step explanation:

I think you should add the following.

6 0

2 years ago

Read 2 more answers

The length of a rectangle is 18 centimeters less than five times it's width. It's area is 35 square centimeters. I need to find

Fiesta28 [93]

$\frac{(5x-18)(x)}{2} =35$
$(5x-18)(x)=70$
$5x^2-18x-70=0$
By the time you factorize this, you will get
x = 5.9521078984053 or <span>-2.3521078984053
</span>Please mark me as brainliest.

4 0

3 years ago

I need the answer to these two problems

dangina [55]

Answer:

the price of one shirt increases from 10 to 15

so c hope it helped

Step-by-step explanation:

6 0

3 years ago