Please help me on this question I would highly appreciate it please

<img src="https://tex.z-dn.net/?f=%20%5Csin%2890%29%20%2B%20%20%5Ccos%2845%20%29%20%3D%20" id="TexFormula1" title=" \sin(90) +

Olenka [21]

Answer:

you know that sin 90 is 1 and cos 45 is 1/√2

so,

$sin90 + cos45 \\ = 1 + \frac{1}{ \sqrt{2} } \\ = \frac{ \sqrt{2} + 1 }{2}$

7 0

3 years ago

Joy needed 4/5 pint of milk for a recipe. Her friend asha said she should use 2/5 cup of milk. Joy said she should use 1 3/5 cip

Mumz [18]

Answer:

Joy is correct

Step-by-step explanation:

we know that

1 cup=1/2 pint

step 1

Convert pint to cups

Divide 4/5 pint by 1/2 to convert to cups

so

$\frac{4}{5}:\frac{1}{2}=\frac{8}{5}\ cups$

step 2

Convert to mixed number

$\frac{8}{5}\ cups=\frac{5}{5}+\frac{3}{5}=1\frac{3}{5}\ cups$

therefore

Joy is correct

5 0

4 years ago

Explain your answer, please

garri49 [273]

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3 0

3 years ago

Read 2 more answers

Bob's exam score was 2.17 standard deviations above the mean. the exam was taken by 200 students. assuming a normal distribution

Lemur [1.5K]

The correct answer is:

1.5% of the scores, or 3 people.

Explanation:

A z-score tells the number of standard deviations a data point is from the mean. Since Bob's score is 2.17 standard deviations above the mean, that means his z-score is 2.17.

Using a z-table, we find the probability that a score would be to the left of, or less than, this value. In the table, this is 0.9850. However, we are interested in the number of people that scored higher than Bob. This means we subtract this from 1:

1-0.9850 = 0.015.

This is the percentage of people that scored higher than Bob. To convert to a percent, multiply by 100:

0.015*100 = 1.5.

To find the number of people that scored higher than Bob, take 1.5% of 200:

0.015(200) = 3.

3 0

3 years ago

Read 2 more answers

Dorothy spent 45 dollars on shoes. This was 5 less than twice the amount she spent on jeans, j. Create an equation that allows h

Dovator [93]

Answer:

i will try to help

Step-by-step explanation:

8 0

4 years ago