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2 years ago

7

A multiple-choice test has five possible answers for each question. If a student guesses at the answer, what is the probability

that he or she selects the correct answer for one particular question?

1 answer:

N76 [4]2 years ago

5 0

Answer:

20% chance of getting the right answer

Step-by-step explanation:

he has a 1/5 chance, translated into 20 percent

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If your front lawn is 17.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1050 new snowflakes every minu

Alexus [3.1K]

Answer: 42.84 kg

Step-by-step explanation: Lawn is 17 ft x 20 ft.

Its area is S = 17 x 20 = 340 ft²

Each ft² of lawn accumulates 1050 snowflakes/min, 1ft² = 1050 s.f./min.

As 1 hour has 60 min, the lawn accumulates 63000/hour →

1050 x 60 = 63000

1ft² = 63000s.f./hour

This way, 340 ft² of lawn will accumulate 21,420,000 s.f/hour →

340 x 63000 = 21420000

As 1 snowflake has 2mg, 21,420,000 will have 42,840,000 mg.

As 1kg = 1,000,000 mg

42,840,000/1,000,000 = 42.84 kg

3 0

3 years ago

The graph of which equation has a slope of 4?

Butoxors [25]

Answer:

(1)

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

We are looking for an equation of the form

y = 4x ± c ( since slope m = 4)

The only equation which fits the description is

y = 4x - 3 → (1)

3 0

3 years ago

Please help me out I will mark brainliest!

emmainna [20.7K]

Answer:

AOX = 30

YOD = 12

DOB = 48

Step-by-step explanation:

All of these angles are supplementary which means they all add up to 180:

x + 18 + 90 + x + 4x = 180

6x + 108 = 180

6x = 180 - 108

6x = 72

x = 12

m<AOX:

x + 18

12 + 18

30

m<YOD:

x

12

m<DOB:

4x

4(12)

48

4 0

3 years ago

A large national bank charges local companies for using their services. A bank official reported the results of a regression ana

yan [13]

Answer:

B

Step-by-step explanation:

8 0

3 years ago

Form a polynomial whose real zeros and degree are given.

Hitman42 [59]

Answer:

Step-by-step explanation:

Given that zeroes of a polynomial are

-3, -1, 1, 4

Degree of the polynomial is 4

Also leading coefficient is 1.

So we find easily the polynomial

Since polynomial is 0 at the given four points the polynomial is a product of

$(x+3)(x+1)(x-1)(x-4)\\=(x^2-1)(x^2-x-12)\\= (x^4-x^3-13x^2+x+12)$

Since leading coefficient is given to be 1 we need not multiply an arbitrary constant a

so the required polynomial is

$(x^4-x^3-13x^2+x+12)$

4 0

3 years ago