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2 years ago

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Scores on a Algebra test have average of 80 with standard deviation of 5. What is the z-score for a student who earned a 82 on t

he test? Round your answer to the nearest thousandth.

1 answer:

Dafna11 [192]2 years ago

3 0

Answer:

16

Step-by-step explanation:

You might be interested in

Solve the system of equations algebraically.

andrew11 [14]

Answer: d. (17, 20)

Step-by-step explanation:

We have the following system of equations:

$x-3y=8$ (1)

$5x-4y=5$ (2)

Isolating $x$ from (1):

$x=\frac{8+3y}{4}$ (3)

Substituting (3) in (2):

$5(\frac{8+3y}{4})-4y=5$ (4)

Isolating $y$ :

$\frac{40}{4}+\frac{15 y}{4}-4y=5$ (5)

$10-5=4y-\frac{15 y}{4}$ (6)

$y=20$ (7)

Substituting (7) in (1):

$x-3(20)=8$ (8)

Isolating $x$ :

$x=17$ (9)

Hence, the correct option is d. (17, 20)

8 0

2 years ago

Who is the president of India?

Oduvanchick [21]

<span><span>The </span>President of India<span> is the formal </span>Head of State, head of the executive and legislature of India and is the commander-in-chief of the Indian Armed Forces. Pranab Kumar Mukherjee<span> born on December 11, 1935 is the 13th and current </span>President of India, in office since July 2012.</span>

8 0

2 years ago

Read 2 more answers

A fireplace arch is to be constructed in the form of a semiellipse. The opening is to have a height of 3 feet at the center and

USPshnik [31]

Answer:

Step-by-step explanation:

Given

Fireplace is in the form of semi-ellipse with height of 3 ft from center

Length of base=8 ft

if the arch is in the form of ellipse then it can be considered as horizontal ellipse with 2 a and 2 b be length of major and minor axis

2 a =8

a=4 ft

If contractor cover the whole base

then total length of string=2a =8 ft

(b)String should be nailed at focus

focus of ellipse is a e

where e=eccentricity

$e=\sqrt{1-(\frac{b}{a})^2}$

$e=\sqrt{1-(\frac{3}{4})^2}=\frac{\sqrt{7}}{4}$

Focus $=ae =\sqrt{7}$

Thus string should be nailed at 2.64 m from center

8 0

2 years ago

Can someone please answer A and B please?

marta [7]

2 bags

7 apples

A) Instead of a lets say:

a = 1, 2 , 3

If a =1 then, (you already know there are 2 bags) you have 1 apple in each bag, making total of 2 apples

If a =2 then you are having 2 apples in each bag making total of 4 apples

If a =3, 3 apples in each bag, making total of 6 apples

Conclusion:

2 * 1 = 2

2 * 2 = 4

2 * 3 = 6

See the difference & pattern here

Now lets do with a

2 * a = 2a

B) If a = 6

then, 2*6 = 12

lets continue from a =3

2*4=8

2*5=10

2*6=12

See the pattern again

Tip: Drawing making problem understand better.

6 0

2 years ago

A farmer wants to fence a rectangular habitat for goats. The length (y) of the habitat has to be at least 80 feet. The farmer cu

Leni [432]

Answer:

d. The farmer can make a habitat that is 40 feet wide and 100 feet long.

Step-by-step explanation:

The attached graph shows the inequalities and the various answer choices. The existence of the doubly-shaded area shows that answer choice C is false.

The appropriate choice is ...

d. The farmer can make a habitat that is 40 feet wide and 100 feet long.

4 0

2 years ago