Ask question

Ask question

All categories

3 years ago

7

if a student scored 78 points on a test where the mean score was 84.5 and the standard deviation was 3.1. the student's z score

is

1 answer:

son4ous [18]3 years ago

5 0

Answer:

(number - mean)/standard deviation.

Plug in the 78 for the number, the 84.5 for the mean, the 3.1 for the standard deviation.

Step-by-step explanation:

You might be interested in

Given f(x) = 3x + 4 and g(x) = 8x + 1<br> then what is ( f + g )(0))?<br><br> *****HELP*^^^^^^

pochemuha

• f(x) = 3x + 4

• g(x) = 8x + 1

Sum both functions above:

(f + g)(x) = f(x) + g(x)

(f + g)(x) = (3x + 4) + (8x + 1)

(f + g)(x) = 3x + 8x + 4 + 1

(f + g)(x) = 11x + 5

Therefore,

(f + g)(0) = 11 · 0 + 5

(f + g)(0) = 0 + 5

(f + g)(0) = 5 <——— this is the answer.

I hope this helps! =)

3 0

3 years ago

Which value satisfies the inequality 5x + 7 ≤ 8x - 3 + 2x?

QveST [7]

Answer:

D) 2

Step-by-step explanation:

5x + 7 $\leq$ 8x -3 +2x

5x + 7 $\leq$ 10x - 3

7 + 3 $\leq$ 10x - 5x

10 $\leq$ 5x

2 $\leq$ x

x $\geq$ 2

8 0

3 years ago

Select the equivalent expression.<br><br><br><br><br> Umm so yeah... happy pride month royals!

den301095 [7]

Answer:

Step-by-step explanation:

The first answer is correct because you are really not changing anything about the question

6 0

3 years ago

nancy spent 7/8 hour working out at the gym she spent 5/7 of that time lifting weights what fraction of an hour did sje spentld

Juli2301 [7.4K]

$\frac{9}{56}\\$ Fraction of hour was spent by NAncy in lifting weights

Step-by-step explanation:

Time spent at the gym by Nancy = $\frac{7}{8}\,hour$

Time spent at lifting weights = $\frac{5}{7}\,hour$

What fraction of hour she spent in lifting weights?

Solving:

Fraction of hour she spent in lifting weights= Time spend at the gym-Time spent at lifting weights

Fraction of hour she spent in lifting weights= $\frac{7}{8}\,hour-\frac{5}{7}\,hour$

$=\frac{49}{56}-\frac{40}{56}\\=\frac{49-40}{56}\\=\frac{9}{56}\\$

So, $\frac{9}{56}\\$ Fraction of hour was spent by Nancy in lifting weights

Keywords: Word Problems involving Fractions

Learn more about Word Problems involving Fractions at:

#learnwithBrainly

7 0

3 years ago

A three-letter word used to show division in a word problem.

Helga [31]

Quotient, dividend, equal to.
hope that this helps you!! =)

6 0

3 years ago

Read 2 more answers