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3 years ago

PLS HELP ME GIVING 43 POINTS I GIVE BRANLIEST PLS HELP ME FOR THIS TEST ITS MATH SUPER EZ

Mathematics

2 answers:

Tems11 [23]3 years ago

8 0

Answer:

Part A: 2n - 8

Part B: 4

Step-by-step explanation:

Part A:

Finding the difference means subtracting

(4n - 3) - (2n + 5)

Combine like terms

2n - 8

It is - 8 because there is a - outside of the parentheses and a + for the 5. Negative + Positive = Negative

Part B:

Plug in 6 for n

2(6) - 8

Use PEMDAS

12 - 8

Naya [18.7K]3 years ago

4 0

Answer:lydra=21,horatio=17

Step-by-step explanation:

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The answer to this question is A

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1 year ago

Find x and y. <br><br> pls pls help

Anna [14]

Answer:

x = 65 , y = 64

Step-by-step explanation:

y - 16 and 2y + 4 are same- side interior angles and sum to 180° , that is

y - 16 + 2y + 4 = 180

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y = 64

then

2y + 4 = 2(64) + 4 = 128 + 4 = 132

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1 year ago

What is the slope of the line whose equation is y - = 0? slope = slope = - slope = 0

sasho [114]

Answer:

the slope is 0

Step-by-step explanation:

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3 years ago

The distribution of number of hours worked by volunteers last year at a large hospital is approximately normal with mean 80 and

wariber [46]

Answer:

E 0.923

Step-by-step explanation:

The Z score is a measurement used in statistics to determine the relationship between a value and a mean of a group of values measured as standard deviation from the mean. The z score (z) is given as:

$z=\frac{x-\mu}{\sigma}$ , Where μ is the mean, σ is the standard deviation and x is the value.

Given that:

σ = 7, μ = 80 and x = 90

$z=\frac{x-\mu}{\sigma}=\frac{90-80}{7} =1.43$

From the normal distribution table, P(X < 90) = P(z < 1.43) = 0.923

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3 years ago

In kilometers, the approximate distance to the earth's horizon from a point h meters above the surface can be determined by eval

Maslowich

In kilometers, the approximate distance to the earth's horizon from a point h meters above the surface can be determined by evaluating the expression

$d= \sqrt{12h}$

We are given the height h of a person from surface of sea level to be 350 m and we are to find the the distance to horizon d. Using the value in above expression we get:

$d= \sqrt{12*350}=64.81$

Therefore, the approximate distance to the horizon for the person will be 64.81 km

8 0

3 years ago