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never [62]
3 years ago
12

Algebra 2 b final answers

Mathematics
2 answers:
hichkok12 [17]3 years ago
7 0
Send a picture or something
nexus9112 [7]3 years ago
4 0
Can you please be more specific?
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Suppose your statistics professor reports test grades as​ z-scores, and you got a score of 2.492.49 on an exam. ​a) Write a sent
kolezko [41]

Answer:

a) Option C) The score was 2.49 standard deviations higher than the mean score in the class.

b) 2.3%

Step-by-step explanation:

a) We are given that the distribution of test grades is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

\displaystyle\frac{x-\mu}{\sigma} = 2.49\\\\x - \mu = 2.49\sigma\\x = \mu + 2.49\sigma

Option C) The score was 2.49 standard deviations higher than the mean score in the class.

b) The z-score for a particular score is -2.

We have to evaluate

P(z < -2)

Calculating the value from normal z-table.

P(z < -2) = 0.023

Thus, 2.3% of  of the class scored lower than my​ friend.

6 0
3 years ago
Maritza’s car has 16 gallons of gas in the tank. She uses 3/4 of the gas. How many gallons of gas does Maritza use?
stepladder [879]

Answer:

Step-by-step explanation:

if she uses 16, you divide that by 4 which is 4/1. therefore, when you remove 4 (3)= 12 out of the 16, you are left with 4 gallons of gas

8 0
3 years ago
Calvin bought 2 t-shirts for $50, and Bradley bought 4 t-shirts for 490. Did they pay the same rate? Explain your reasoning.
Snezhnost [94]

Answer:

490 devided by 4 is 122.5 which is the amount Bradley payed per shirt, Calvin only payed 50 dollars per shirt. No the pay is not the same and the difference is 72.5

Step-by-step explanation:

(p.s this is just what I got from this so im not 100 percent sure)

5 0
3 years ago
Read 2 more answers
Triangle ABC has vertices at (3,1) and (6,4).Rotate this triangle 180 degrees about the origin then reflect it over the Y-Axis.
Tems11 [23]

Answer:

3, -1

6,-4

IDK about the third vertices, you didn't give the original coordinates!

Step-by-step explanation:

180 degree rotation= (x,y) to (-x,-y)

3,1 goes to -3,-1

6,4 goes to -6, -4

IDK about the third vertice, you didn't mention it.

Reflection over y-axis= (x,y) to (-x,y)

-3, -1 goes to 3, -1

-6,-4 goes to 6,-4

hope this helps!

Brainliest?

have a good day!

5 0
3 years ago
match each binomial expression with the set of coefficient of the term obtain by expanding the expression
mars1129 [50]

(2x+y)^3 = 8x^3+12x^2y+6xy^2+y^3

The coefficients are  8 , 12, 6, 1

(2x+3y)^4= 16x^4+96x^3y+216x^2y^2+216xy^3+81y^4

The coefficients are  16, 96, 216, 216, 81

(3x+2y)^3=27x^3+54x^2y+36xy^2+8y^3

The coefficients are  27, 54,36 , 8

(x+y)^4 = x^4+4x^3y+6x^2y^2+4xy^3+y^4

The coefficients are 1, 4, 6, 4, 1

8 0
4 years ago
Read 2 more answers
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