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3 years ago

PLEASE HELP THANKS SO MUCH!! WOOT WOOT

Mathematics

1 answer:

marusya05 [52]3 years ago

3 0

Wanna learn a trick? Since there’s 4 wholes in 1 circle. Each whole=25 percent if it’s filled out the complete circle then the answer will be 100 percent but since there’s only one whole filled out, the answer will be officially 25 percent. Therefore 25 percent is represented by the shaded area

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The score on a trivia game is obtained by subtracting the number of incorrect answers from twice the number of correct answers.

labwork [276]

Answer:

Step-by-step explanation:

A player answers x correct questions and y incorrect questions for a total of 40 questions.

x + y = 40

The score is obtained by subtracting y incorrect answers from two times the x of correct answers. The player's score is 50.

2x - y = 50

Use substitution to solve. Rearrange the first equation so that it is equal to y. Then, substitute the y-value into the second equation.

x + y = 40

y = 40 - x

2x - y = 50

2x - (40 - x) = 50

2x - 40 + x = 50

3x - 40 = 50

3x = 90

x = 30

Since x was made to represent correct answers, the player had 30 correct answers.

8 0

3 years ago

The owner of a rental company rents bicycles and tricycles and keeps inventory by counting seats and wheels. One day, he counts

My name is Ann [436]

Answer:

2b + 3t = 60

Step-by-step explanation:

2b is the number of wheels on a bicycle

3t is the number of wheels on a tricycle

and 60 is the total number of wheels

5 0

3 years ago

A survey of 2306 adult Americans aged 18 and older conducted by Harris Interactive found that 417 have donated blood in the past

disa [49]

Answer:

a) p = 0.1808

b) Since 341.54 ≥ 10. Therefore the requirements for constructing a confidence interval for p is satisfied.

c) The interval is (0.1676, 0.194)

d) We are 90% confident that the population proportion of adult Americans who have donated blood in the past two years is between 0.1676 and 0.194

Step-by-step explanation:

Given that:

n = 2306 and x =417

a) Obtain a point estimate for the population proportion (p) is the ratio of sample successes to sample size.

Therefore: p = x / n = 417 / 2306 = 0.1808

p = 0.1808

b) requirements for constructing a confidence interval for p is given by:

np(1-p) ≥ 10

Therefore: np(1-p) = 2306(0.1808)(1 - 0.1808) = 341.54 ≥ 10

Since 341.54 ≥ 10. Therefore the requirements for constructing a confidence interval for p is satisfied.

c) c = 90% = 0.9

α = 1 - 0.9 = 0.1

α / 2 = 0.1 /2 = 0.05

From the probability table, $z_{\frac{\alpha}{2} } = 1.645$

Margin of error (e) = $z_{\frac{\alpha}{2} } \sqrt{\frac{p(1-p)}{n} } =1.645* \sqrt{\frac{0.1808(1-0.1808)}{2306} }=0.0132$

The boundaries are (p - e, p + e) = (0.1808 - 0.0132, 0.1808 + 0.0132) = (0.1676, 0.194)

The interval is (0.1676, 0.194)

d) We are 90% confident that the population proportion of adult Americans who have donated blood in the past two years is between 0.1676 and 0.194

6 0

3 years ago

Read 2 more answers

Amanda purchases a storage cube that has a volume of 4 Cubic feet She wants to put it on a bookshelf that is 12 inches tall. Wil

goldenfox [79]

Yes... yes it would fit...

3 0

4 years ago

White shapes and black shapes are used in a game some of these shapes are circles and all the rest of the shapes are squares the

daser333 [38]

Answer:

(D) THE AREA CAN BE FOUND BY COURITING THE GRID SQUARES INSIDE THE SHAPE.

Step-by-step explanation:

7 0

2 years ago