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jeka94
3 years ago
6

A student takes a multiple-choice test with 8 questions on it, each of which has 4 choices. The student randomly guesses an answ

er to each question.
What is the probability that the student gets at least 1 question correct?

Round to 3 decimal places.

Mathematics
1 answer:
zimovet [89]3 years ago
3 0

Answer:

0.900

Step-by-step explanation:

hope it helps u

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Whoever gets this right gets brainlyess answer and it's worth 10 points :)
babymother [125]
A=$20.20/10gal=$2.02 per gal

B=$26.04/12gal=$2.17 per gal

C=$28.14/14gal=$2.01 per gal

D=$30.45/15gal=$2.03 per gal

So C is the cheapest per gallon.
3 0
3 years ago
Sonji paid $25 for two scarves, which were different prices. When she got home she could not find the receipt. She remembered th
Oksanka [162]

Answer:

$14

Step-by-step explanation:

Make the variables:

x

x + 3

2x + 3 = 25

2x = 22

x = 11

11, 14

5 0
3 years ago
Read 2 more answers
A potted tree weighs 21 pounds. The pot weighs 3 pounds. If w represents the weight of the tree without the pot, write an equati
masha68 [24]
W = 21 - 3
weight of the tree = 21 pounds - 3 pounds
8 0
3 years ago
Question 1
Vikki [24]

Answer:

(B)15,36,39

Step-by-step explanation:

To determine which of the line segments could create a Right Triangle, we check if it satisfies the Pythagoras Theorem, taking the longest part to be the Hypotenuse in all cases.

By Pythagoras Theorem: Hypotenuse^2=Opposite^2+Adjacent^2

In  15,30,35

35^2\neq 15^2+30^2\\1225\neq 1125

In 15,36,39

39^2=36^2+15^2\\1521=1521

In 15, 20, 29

29^2\neq 15^2+20^2\\841\neq 625

In 5,15,30

30^2\neq 15^2+5^2\\900\neq 250

We can see that only 15,36,39 satisfies the required condition and thus it could be used to create a right triangle.

4 0
3 years ago
Jacob throws an acorn into the air. It lands in front of him. The acorn's path is
Burka [1]

Answer:

  • hits the ground at x = -0.732, and x = 2.732
  • only the positive solution is reasonable

Step-by-step explanation:

The acorn will hit the ground where the value of x is such that y=0. We can find these values of x by solving the quadratic using any of several means.

__

<h3>graphing</h3>

The attachment shows a graphing calculator solution to the equation

  -3x^2 + 6x + 6 = 0

The values of x are -0.732 and 2.732. The negative value is the point where the acorn would have originated from if its parabolic path were extrapolated backward in time. Only the positive horizontal distance is a reasonable solution.

__

<h3>completing the square</h3>

We can also solve the equation algebraically. One of the simplest methods is "completing the square."

  -3x^2 +6x +6 = 0

  x^2 -2x = 2 . . . . . . . . divide by -3 and add 2

  x^2 -2x +1 = 2 +1 . . . . add 1 to complete the square

  (x -1)^2 = 3 . . . . . . . . written as a square

  x -1 = ±√3  . . . . . . . take the square root

  x = 1 ±√3 . . . . . . . add 1; where the acorn hits the ground

The numerical values of these solutions are approximately ...

  x ≈ {-0.732, 2.732}

The solutions to the equation say the acorn hits the ground at a distance of -0.732 behind Jacob, and at a distance of 2.732 in front of Jacob. The "behind" distance represents and extrapolation of the acorn's path backward in time before Jacob threw it. Only the positive solution is reasonable.

3 0
1 year ago
Read 2 more answers
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