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2 years ago

Can someone help me and explain how to do these probability questions?

Mathematics

2 answers:

Alex_Xolod [135]2 years ago

6 0

The answer to question A is 1/100 and 1%. For question B I think the answer is C but I’m not 100% sure on that unfortunately.

devlian [24]2 years ago

6 0

a. The probability is 1/100 since there are 10 possible digits (0-9) and you need the last two digits so $\frac{1}{10}*\frac{1}{10}=\frac{1}{100}$ .

This is 1%.

b. Let's start by calculating the probability of getting the right digits knowing that they are both even.

We have a total of 5 even digits (0, 2, 4, 6, 8). You need the last two so $\frac{1}{5}*\frac{1}{5} =\frac{1}{25}=\frac{4}{100}$ which is 4%.

Therefore the answer is a) It increases the probability that your choice is correct to 1/25, or 4%, because each digit could be 0, 2, 4, 6 or 8.

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Members of the student concil are conducting a fundraiser by selling school calendars. After selling 80 calendars, they had a lo

Oksana_A [137]

Answer:

a) $y=8x-1000$

b) $profit=\$8$

c) They'd have lost $1000 if they had sold no calendars.

Step-by-step explanation:

a) The equation of the line in Slope-Intercept form is:

$y=mx+b$

Where "m" is the slope and "b" is the y-intercept.

In this case we know that "y" represents the profit of loss and "x" the number of calendars sold.

Then, according to the exercise, the line passes through these two points:

$(80,-360)$ and $(200,600)$

Then, we can find the slope of the line with the formula $m=\frac{y_2-y_1}{x_2-x_1}$

$m=\frac{-360-600}{80-200}=8$

Now, we can substitute the slope and one of those points into $y=mx+b$ and solve for "b":

$600=8(200)+b\\\\b=-1000$

Then, subtituting values, we get that the equation that describes the relation between the profit of loss and the number of calendars sold, is:

$y=8x-1000$

b) The slope of the line is the profit they made from selling each calendar

$profit=8$

c) The y-intercept is the amount they would have lost if they had sold no calendars:

$b=-1000$

They'd have lost $1000 if they had sold no calendars.

6 0

2 years ago

Answer this please I’ll give brainalist + points, please help!

ArbitrLikvidat [17]

Answer:

The answer is C because the largest mode is the longest set with the biggest numbers

Step-by-step explanation:

4 0

2 years ago

How do you graph? <br> y=−4/3x+8y

trasher [3.6K]

How do we graph anything? Make a table of values for x and y and then plot each point. After plotting each point on the xy-plane, connect each point with a straight line or curve (depending on the function).

In this case, we must first isolate y.

y = (-4/3)x + 8y

y - 8y = (-4/3)x

-7y = (-4/3)x

y = (-4/3)x ÷ (-7)

y = (4/21)x

Now follow the steps above.

8 0

2 years ago

At breakfast, a restaurant charges $2 for the first cup of orange juice and then $1 for each refill. Which graph represents this

Black_prince [1.1K]

Graph 4 represents the situation

8 0

3 years ago

Read 2 more answers

A rectangle has a length that is 2 meters more than the width. The area of the rectangle is 288 square meters. Find the dimensio

Rufina [12.5K]

Answer:

L = 18 and w = 16

Step-by-step explanation:

The area of a rectangle is found by A = l*w. Since the length here is 2 more than the width or 2 + w and the width is w, substitute these values and A = 288 to solve for w.

$A = l*w\\288 = w(2+w)\\288 = w^2 + 2w$

To solve for w, move 288 to the other side by subtraction. Then factor and solve.

$w^2 + 2w - 288 = 0 \\(w +18)(w-16) = 0\\$

Set each factor equal to 0 and solve.

w - 16 = 0 so w = 16

w + 18 = 0 so w = -18

Since w is a side length and length/distance cannot be negative, then w = 16 is the width of the rectangle.

This means the length is 16 + 2 = 18.

7 0

2 years ago