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3 years ago

A concave octagon B convex quadrilateral C concave quadrilateral D convex octagon

Mathematics

1 answer:

balu736 [363]3 years ago

4 0

Answer: concave

Step-by-step explanation:

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1. Rich wants to buy a coat priced at x dollars. It is on sale for 20% off. He must

alexandr1967 [171]

Answer: $x-0.20x+0.0725x$

Step-by-step explanation:

Let x be the price. 20% (0.20) 7.25% (0.0725)

$x-0.20x+0.0725x$

6 0

3 years ago

what is an equation to represent for (Andre withdrew spending money from his checking account that initially had $982. What was

Paul [167]

Answer:

The Answer is w - 982 = 922 because it whatever money he took from the 982 lead to 922

Step-by-step explanation:

6 0

2 years ago

Mark has a bushel of apples which weighs 48 pounds. He wants to make some apple pies. If each apple pie requires 2.5 pounds of a

mixas84 [53]

This is easy, all you need to do is divide 48/2.5 and you have your answer.

3 0

3 years ago

The probability of rain on the last day of July is 95 % . If the probability remains constant for the first seven days of August

8090 [49]

The probability that it rains at most 2 days is 0.00005995233 and the variance is 0.516

<h3>The probability that it rains at most 2 days</h3>

The given parameters are:

Number of days, n = 7
Probability that it rains, p = 95%
Number of days it rains, x = 2 (at most)

The probability that it rains at most 2 days is represented as:

P(x ≤ 2) = P(0) + P(1) + P(2)

Each probability is calculated as:

$P(x) = ^nC_x * p^x * (1 - p)^{n - x}$

So, we have:

$P(0) = ^7C_0 * (92\%)^0 * (1 - 92\%)^{7 - 0} = 0.00000002097$

$P(1) = ^7C_1 * (92\%)^1 * (1 - 92\%)^{7 - 1} = 0.00000168821$

$P(2) = ^7C_2 * (92\%)^2 * (1 - 92\%)^{7 - 2} = 0.00005824315$

So, we have:

P(x ≤ 2) =0.00000002097 + 0.00000168821 + 0.00005824315

P(x ≤ 2) = 0.00005995233

Hence, the probability that it rains at most 2 days is 0.00005995233

This is calculated as:

Mean = np

So, we have:

Mean = 7 * 92%

Evaluate

Mean = 6.44

Hence, the mean is 6.44

<h3>The standard deviation</h3>

This is calculated as:

σ = √np(1 - p)

So, we have:

σ = √7 * 92%(1 - 92%)

Evaluate

σ = 0.718

Hence, the standard deviation is 0.718

<h3>The variance</h3>

We have:

σ = 0.718

Square both sides

σ² = 0.718²

Evaluate

σ² = 0.516

This represents the variance

Hence, the variance is 0.516

Read more about normal distribution at:

brainly.com/question/4079902

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7 0

2 years ago

Write an expression in terms of x that represents the distance between (2,10) and (x,10) for x>2.

ehidna [41]

Answer:

Step-by-step explanation:

$d=\sqrt{(x-2)^2+(10-10)^2} =\sqrt{(x-2)^2}=x-2$

7 0

3 years ago