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2 years ago

I need help please :)

Mathematics

1 answer:

givi [52]2 years ago

5 0

11x9=99
11x7=77
7x5/2=35/2
99+99+77+35/2+35/2= 310

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Subtract 428,731- 175 ,842

bearhunter [10]

Your answer is 252,889

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3 years ago

Please help me to know what 15 x 3/4 is

VikaD [51]

Answer:

11.25 // 11 $\frac{1}{4}$

Step-by-step explanation:

15×0.75

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2 years ago

Read 2 more answers

A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a s

Umnica [9.8K]

Answer:

88.51 is the minimum score needed to receive a grade of A.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73

Standard Deviation, σ = 11

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

Formula:

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

We have to find the value of x such that the probability is 0.0793.

$P( X \geq x) = P( z \geq \displaystyle\frac{x - 73}{11})=0.0793$

$= 1 -P( z \leq \displaystyle\frac{x - 73}{11})=0.0793$

$=P( z \leq \displaystyle\frac{x - 73}{11})=0.9207$

Calculation the value from standard normal z table, we have,

$P(z \leq 1.410) = 0.9207$

$\displaystyle\frac{x - 73}{11} = 1.410\\x =88.51$

Hence, 88.51 is the minimum score needed to receive a grade of A.

3 0

2 years ago

WILL MARK YOU BRAINLIEST!!!!!!

dem82 [27]

Answer:

First and second

Step-by-step explanation:

8 0

2 years ago

Using the slope formula, find the slope of the line through the given points.

UNO [17]

Answer:

Step-by-step explanation:

Slope = (y2-y1)/(x2-x1)

= (-5--5)/ (9--8)

= (-5+5)/(9+8)

= 0/17

The slope it 0

This is a horizontal line because the y value doesn't change. If the y value doesn't change, the slope it zero.

4 0

2 years ago