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3 years ago

13

A quiz consists of 4 true-false questions. What is the probability of getting 100% on the quiz by randomly guessing the answer t

o all 4 questions?
1/2
2/5
1/16

2 answers:

Rudik [331]3 years ago

6 0

1/2 is the answer bc it is the best choice between them so

timofeeve [1]3 years ago

4 0

2/5... there's actually not a chance of getting a 100 so Ima go with 1/16 as my final answer

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Nutka1998 [239]

Answer:

C.)-18 $\sqrt{7}$ Is your answer!

Step-by-step explanation:

Please mark brainliest if this helped! :D

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2 years ago

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Giving a test to a group of students, the grades and gender are summarized below. if one student was chosen at random, find the

Anastasy [175]

Answer: 40% of the total population is female.

To find the probability that a student is female, first add up both the number of males and females.

39 + 26 = 65

Now, divide the total number of females by 65 and multiply by 100.

26 / 60 = 0.4 x 100 = 40%

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3 years ago

Can someone help me with this?

Readme [11.4K]

I have question that too but quadratic equations

5 0

3 years ago

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A given line has the equation 10x + 2y = −2.

worty [1.4K]

The equation is $\boxed{ \ y = - 5x + 12 \ or \ y = 12 - 5x} \ }$

<h3>Further explanation </h3>

This case asking the end result in the form of a slope-intercept.

<u>Step-1: find out the gradient. </u>

10x + 2y = -2

We isolate the y variable on the left side. Subtract both sides by 10x, we get:

2y = - 10x - 2

Divide both sides by two

y = -5x -1

The slope-intercept form is $\boxed{ \ y = mx + c \ }$ , with the coefficient m as a gradient. Therefore, the gradient is m = -5.

If you want a shortcut to find a gradient from the standard form, implement this:

$\boxed{ \ ax + by = k \rightarrow m = - \frac{a}{b} \ }$

10x + 2y = −2 ⇒ a = 10, b = 2

$\boxed{m = - \frac{10}{2} \rightarrow m = -5}$

<u>Step-2:</u> the conditions of the two parallel lines

The gradient of parallel lines is the same $\boxed{ \ m_1 = m_2 \ }$ . So $\boxed{m_1 = m_2 = -5}.$

<u>Final step:</u> figure out the equation, in slope-intercept form, of the parallel line to the given line and passes through the point (0, 12)

We use the point-slope form.

$\boxed{ \ \boxed{ \ y - y_1 = m(x - x_1)} \ }$

Given that

m = -5
(x₁, y₁) = (0, 12)

y - 12 = - 5(x - 0)

y - 12 = - 5x

After adding both sides by 12, the results is $\boxed{ \ y = - 5x + 12 \ or \ y = 12 - 5x} \ }$

<u>Alternative steps </u>

Substitutes m = -5 and (0, 12) to slope-intercept form $\boxed{ \ y = mx + c \ }$

12 = -5(0) + c

Constant c is 12 then arrange the slope-intercept form.

Similar results as above, i.e. $\boxed{ \ y = - 5x + 12 \ or \ y = 12 - 5x} \ }$

<u>Note: </u>

$\boxed{Standard \ form: ax + by = c, with \ a > 0}$

$\boxed{Point-slope \ form: y - y_1 = m(x - x_1)}$

$\boxed{Slope-intercept \ form: y = mx + k}$

<h3>Learn more </h3>

A similar problem brainly.com/question/10704388
Investigate the relationship between two lines brainly.com/question/3238013
Write the line equation from the graph brainly.com/question/2564656

Keywords: given line, the equation, slope-intercept form, standard form, point-slope, gradien, parallel, perpendicular, passes, through the point, constant

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3 years ago

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Suppose A and B represent two different schools populations where A>B abd A and B must be greater than 0. Which of the follow

igor_vitrenko [27]

Hmm, one way we can do this is by assigning numbers to each

A=4 and B=3
A>B because 4>3

so

A. 2(A+B)=2(4+3)=2(7)=14
B. A+B^2=4+3^2=4+9=13
C. A^2+B^2=4^2+3^2=16+9=25
D. A^2-B^2=4^2-3^2=16-9=7

the largest is 25 so C

8 0

3 years ago