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2 years ago

The mean score on biology quiz was 62 with a standard deviation of 8, Jose’s score was a 74% what was his z score?

Mathematics

1 answer:

melisa1 [442]2 years ago

7 0

(74-62)/8=3/2=1.5
Thank you hope this helps

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Solve the inequality:-3x-4/7 >5

Aliun [14]

x < - $\frac{13}{7}$

add $\frac{4}{7}$ to both sides

- 3x > $\frac{4}{7}$ + $\frac{35}{7}$

- 3x > $\frac{39}{7}$ ( divide both sides by - 3 )

note that when we divide/ multiply by a negative quantity we must reverse the inequality symbol

x < - $\frac{13}{7}$

6 0

3 years ago

20 is what percent of 32 <br> Write as an equation

AlladinOne [14]

20% of 32= 6.4

20% x 32

20 /100 x 32
Reduce the fraction
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=6.4

8 0

3 years ago

Factor the polynomial.<br><br> X2-13x+30

Svetllana [295]

Answer:

<h2> $\ \boxed{(x - 3)(x - 10)}$ </h2>

Step-by-step explanation:

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Write -13x as a difference

${x}^{2} - 3x - 10x + 30$

Factor out x from the expression

$x(x - 3) - 10x + 30$

Factor out -10 from the expression

$x(x - 3) - 10(x - 3)$

Factor out x-3 from the expression

$(x - 3)(x - 10)$

Hope I helped!

Best regards!!

4 0

2 years ago

0.25x-8=16 what value of x makes the equation true?

prohojiy [21]

0.25x-8=16 add 8 to both sides. you get 0.25x=8. divide by .25 on each side x=32

8 0

3 years ago

Solve for x. (Similar Triangles)

Softa [21]

Answer:

x = 1

Step-by-step explanation:

its a special right trianlge. So both sides are the same.

3 0

2 years ago