Example # 12: The probability that Mary can work a problem is 70%.

Find the probability that Mary cannot work the problem.

HELP PLEASE!!!

Answers

Answer 1

Answer:

the answer is 30% hope this helps you

Answer 2

Answer:

30%

Step-by-step explanation:

The two outcomes (can work the problem and can't work the problem) are complementary.

In probability theory, the complement of any event A is the event [not A], i.e. the event that A does not occur. The event A and its complement [not A] are mutually exclusive and exhaustive.

Complementary events are two outcomes of an event that are the only two possible outcomes.

Complementary outcomes add to 1 or 100%.

100 - 70 = 30.


Related Questions

Evaluate.

(w2x−3)÷10⋅z when w=−4, x = 0.8, and z=−4/5

Enter your answer as a simplified mixed number in the box.

Answers

Answer:

⅘ ≈ 0,8

Step-by-step explanation:

(w2x - 3) ÷ 10 × z

= (-4 × 2 × 0,8) ÷ 10 × -⅘

= (-8 × 0,8) ÷ -8

= -6,4 ÷ -8

= ⅘ ≈ 0,8

Conclusion:

Evalute (w2x - 3) ÷ 10 × z is ⅘ ≈ 0,8.

[tex] [/tex]

After using the linear equations method we will get 1.76.


What is linear equations?
An equation is said to be linear if the highest power of a variable is consistently 1. Another name for it is a one-degree equation. A linear equation with one variable has the standard form Ax + B = 0. In this case, the variables x and A are variables, while B is a constant. A linear equation with two variables has the standard form Ax + By = C. Here, the variables x and y, the coefficients A and B, and the constant C are all present. A linear equation is one that has a degree of 1 as its highest value. No variable in a linear equation, then, has an exponent greater than 1. A linear equation's graph will always be a straight line.

How to calculate question by adding their values in the given equation?

firstly, the given equation is: [w2x-3]/10z
the things or values which are given to us:
w=-4x=0.8z=-4.5
Now putting all the values in the given equation:
[-4*2*0.8-3]/10*-4.5-9.72/-5.5
[by solving the brackets]1.76 [by solving the equation]

Hence the answer is, 1.76

To learn more about linear equations
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Find the equation of the line through the point (1, 16) that is parallel
to the given line. Write your final answer in slope-intercept form.
2y – 14x = 12

Answers

I think slope intercept form is y = mx + b. So first write the original line like this:

2y = 14x + 12 (add 14x to both sides)
y = 7x + 6 (divide all by 2 so we just have y and not 2y)

Parallel means it has the same slope but different intercept. So we need to know which intercept allows us to have a slope of 7 but go through the point (1, 16).

y = 7x + b
16 = 7(1) + b (substitute x & y)
16 = 7 + b (simplify)
9 = b (subtract 7 on both sides)

So the intercept is 9. So the equation of the parallel line would be y = 7x + 9.

And that answer is parallel to the original line y = 7x + 6; the whole line is shifted upwards by 3 units.

Somebody please help me w/ this <3

Answers

Answer:

2 times

Step-by-step explanation:

The longest worm is 2 times the length of the shortest worm

4. As Jody dives below the water, its temperature decreases by 0.3 degrees Fahrenheit per foot that he dives. If
Jody is diving at a rate of 2.5 feet per second and the water at the surface is at a temperature of 68 degrees
Fahrenheit then what is the temperature of the water Jody is in after diving for 20 seconds?

Answers

Using proportions and a linear function, it is found that the temperature of the water Jody is in after diving for 20 seconds is of 53 degrees Fahrenheit.

Jody is diving at a rate of 2.5 feet per second, thus, after 20 seconds, his depth is of:

[tex]20 \times 2.5 = 50[/tex]

The temperature at the surface is of 68 degrees. For each foot, it decreases by 0.3 degrees. Thus, the function is:

[tex]T(f) = 68 - 0.3f[/tex]

Jody is at a depth of 50 feet, thus the temperature is T(50).

[tex]T(50) = 68 - 0.3(50) = 53[/tex]

The temperature of the water Jody is in after diving for 20 seconds is of 53 degrees Fahrenheit.

A similar problem is given at https://brainly.com/question/24316569

Kendra is also buying souvenirs for the family reunion. She wants to spend under $2.25 for each item.

Which souvenirs cost less than $2.25 per item?

Check all that apply.

tote bags: 25 for $49.00
picture frames: 15 for $32.25
water bottles: 12 for $27.60
mugs: 8 for $15.92
T-shirts: 10 for $25.00

Answers

Answer:

1st,2nd,4th,

Step-by-step explanation:

You have to divide the price by the numbers of items!

Answer:

It's A,B,D

Hence, 1 tote bag, 1 picture frame and 1 mug cost under $2.25.

Step-by-step explanation:

are the two triangles congruent 6cm 13cm

Answers

Congruent triangles are triangles that have equal corresponding angles and sides.

There is no enough information to determine if the triangles are congruent.

From the images of the triangles (see attachment), we can see that the two triangles have 6cm and 13cm as the lengths of their sides.

However, the side lengths of both triangles are not corresponding, and the angle measures are not given.

Hence, there is no enough information to determine if the triangles are congruent.

Read more about congruent triangles at:

https://brainly.com/question/1675117

Blake can paint a room in 9 hours, Ned can paint the same room in 6 hours, how long to paint the room together

Answers

Work done by Blake = 1/9; Work done by Ned = 1/6; Total work done by both of them together is given by 1/6 +1/6 = 3+2/18 = 5/18; So, the time taken by both of them if they work together is given by: 18/5 =3 3/5 hours.

What is 104 1/6 simplified pls help me

Answers

Answer:

104

Step-by-step explanation:

If is wrong i'm sorry

A painter made the table below to show the amount of paint it takes to cover a certain amount of square feet. The amount of paint varies directly with the area of each wall.

Amount of Paint and Size of Wall
Area of wall feet squared, x
64
144
400
Amount of paint (pints), y
4
9
25

How much paint should the painter expect to use to paint a wall with an area of 256 square feet?

Answers

Answer:

16 pints

Step-by-step explanation:

it seems like there's a pattern. when you divide x by 16, you get the result of y.

64/16 = 4

144/16 = 9

400/16 = 25

so to find the answer would be x/16 = y.

sqrt ft is x, pints is y.

we're looking for how many pints of pain we should use for 256 sqrt ft. we use that same equation, but replace x with 256, and solve for y.

256/16 = 16

therefore, your answer is 16 pints.

Answer:

Its for the person above me to get brainiest! really great answer!

Step-by-step explanation:

Yw! :D

What is the decimal number 34.576 written in expanded form?

Answers

Answer:

30+4+0.5+0.07+0.006

Step-by-step explanation:

A jar has 20 marbles: 3 green, 12 blue, 5 red.

What is the probability of randomly choosing a red and then a green marble (keep the red marble when you choose it)?

Answers

Probability is defined as the likelihood or the certainty that an event is going to occur or happen.

The probability of randomly choosing a red and then a green marble is [tex]3/76[/tex].

The total number of marbles = 20

The number of green marbles= 3

The number of blue marbles = 12

The number of red marbles = 5

The probability of choosing a red marble = Number of red marbles / Total number of marbles

= 5/20

In simplest fraction form = [tex]\frac{1}{4}[/tex]

We are told in the question that you keep the red marble you choose, So this means the total number of marbles left reduces to 19

The probability of choosing a green marble is =  Number of green marbles / New total number of marbles

= 3/19

Therefore, the probability of randomly choosing a red and then a green marble is

P (Red) x P(Green)

= 1/4  x 3/19

= [tex]3/76[/tex]

To learn more, visit the link below:

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The slope of Consider the line whose equation is 3x + y - 3 = 0. The slope of any line that is parallel to this line is any line that is perpendicular to this line is​

Answers

Answer:

parallel : y = -3x + 3

perpendicular : y = 1/3x + 3

Step-by-step explanation:

rewrite 3x + y - 3 = 0

y = -3x + 3

parallel has the same slope

so

parallel : y = -3x + 3

perpendicular is negative reciprocal of the slope

so

-3x becomes 1/3x

so

perpendicular : y = 1/3x + 3

fast 100 points right check

Answers

Answer:

It won't let me put my answer sorry

Illinois' population is now 12.5 million and decreasing by 0.1 million each year. On the other hand, Arizona's population is 6.9 million and increasing by 0.6 million each year. In how many years will the two states have the same population?

Answers

Answer:

8 years

Step by step guide:

100,000 x 8 = 800,000

600,000 x 8 = 4,800,000

6,900,000 + 4,800,000 = 11,700,000

12,500,000 - 800,000 = 11,700,000

Round the following numbers to 1 significant figure: a) 276 040 b) £238.02 c) 17521 km​

Answers

Answer:

a) 300000 b)£200 c) 20000km

Step-by-step explanation:

Which of the following describes a geometric sequence?
A. a sequence in which the terms are not related in any way
B. a sequence in which terms are given by multiplying the previous term by a common ratio
C. a sequence in which terms are given by adding the previous term to a common ratio
D. a sequence in which terms are given by subtracting the previous term from a common ratio

Answers

Answer:

B. A sequence in which terms are given by multiplying the previous term by a common ratio

Hope this helped. A brainliest would be very much appreciated. (I need 5 brainliest so I can level up) :)

Answer:

c

Step-by-step explanation:

Si una semana después la caja fue agrandada 0.43m2 porque llegó una nueva serpiente ¿ahora cuánto mide el piso de la caja

Answers

The length of the floor of the box with an area of [tex]0.43m^2[/tex] is 0.66m

Let the area of the enlarged portion be a square and the formula is expressed as:

[tex]A = L^2[/tex]

L is the side length or the floor of the box.

Given the following parameters:

[tex]A = 0.43m^2[/tex]

Substitute the given parameters into the formula as shown:

[tex]0.43 = L^2\\L =\sqrt{0.43}\\L= 0.6557[/tex]

Hence the length of the floor of the box with an area of [tex]0.43m^2[/tex] is 0.66m

Learn more here: https://brainly.com/question/17182640

find the value of x
[tex]x[/tex]

Answers

70°

Step-by-step explanation:

because AB//CD value of x is :

x = 30° + 40°

x = 70°

Can someone help me out please

Answers

Answer:

The function is even.

Step-by-step explanation:

The graph resembles y = 1/x^2.

divide the following mixed fraction
2 7/10 ÷ 3 1/4

Answers

Answer:

54/155

Step-by-step explanation:

do the reciprocal of 31/4then multiply it with27/10

Answer:

54/155

Step-by-step explanation:

hope it works out for you

A map of Asia has a scale of 1.5 inches= 300 miles. The distance between Thailand and China is about 5.25 inches. How far is it from Thailand to China in miles? Round to the nearest mile.

Answers

Answer:

1050

5.25/1.5 = 3.5

3.5x300 = 1050

Ken has 45 books to put on shelves.
He wants to put the same number of books on each shelf.
Which of the following lists shows all of the choices for how many books to put on each shelf?

Answers

Answer:

3, 5, 9, 15

Step-by-step explanation:

Just find all the factors

#
Members of Stonebridge Community
Pool pay $120 each year plus $2 per
visit to the pool. Non-members do not
poy an annual fee but pay $5 per visit
to the pool. How many visits to the pool
in a year would it take for a member
and a non-member to pay the same
total amount?

Answers

Answer:

It would take 40 times to match the amount of money

In 2019, the minimum wage in Arizona is $11 per hour. The total cost of renting a one-bedroom apartment in one city is $1410 per month. Without considering any other living expenses or deductions, could a person working 40 hours a week at the minimum wage cover the $1410 per month?

1.Yes, they have $495.20 more than they need.
2.No, the total earned is $495.20.
3.Yes, they have $1905.20 more than they need.
4.No, $1905.20 is not enough.

Answers

Answer:

1

Step-by-step explanation:

40 x 11 = 440

440 x 4 = 1760

Solve the inequality and graph the solution on the line provided. -20+5x >5

Answers

Answer:

x>5

Step-by-step explanation:

-20+5x>5

5x>25

X>5

X=

--l----l----l----l----l----l----l----l----l

 6   7    8   9   10  11   12 ....   ∞

3.HELP plz No LINKS AND NO HACKERS i will give brainlyiest NO COPIE D ANSWERSFROM OTHER USERS OR WEBSITE I WILL REPORT!!!! A scuba diver was exploring a reef 32.12 m below sea level. The diver ascended to the surface at a rate of 8.8 m/min.
(a) Write an equation to model the situation. Use the formula d = rt.
(b) Explain why it is reasonable to write the distance, d, as a positive number.
(c) How long did it take the diver to reach the surface?

Answers

Answer:

A scuba diver was exploring a reef 32.12 m below sea level. The diver ascended to the surface at a rate of 8.8 m/min.

a. using the formula d = rt, so 32.12 m = 8.8m/min (t)

b. it is reasonable to write the distance as positive because the diver is accending/ going up the surface

c. t = 32.12/ 8.8 = 3.65 min

Step-by-step explanation:

hope this helps

What is the distance between the points (15,17) and (15,-4) in the coordinate plane?
A.
21 units
B.
10.5 units
C.
13 units
D.
2 units

Answers

Answer:

21

Step-by-step explanation:

15-15=0

17-(-4)=21

sqrt(0^2+21^2)=21

The product of two positive consecutive integers is 72. Find the integers.

Answers

Answer:

8 and 9

Step-by-step explanation:

8 times 9 is equal to 72

5. Ari is playing a board game. After 3 moves he is on
space 17. Ari's first move was forward 2 spaces, and
his third move was forward 7 spaces. What was Ari's
second move? Explain how you found the answer.

Answers

Answer:

8

Step-by-step explanation:

17-(9+2)=8

Samantha spent 40 minutes on homework sixty percent of that time was spent on language arts how many minutes were spent in language art

Answers

Answer:

i think its b.24 minutes

Step-by-step explanation:

sorry if im wrong

Answer:

Samantha spent 24 minutes on language arts.

Step-by-step explanation:

So, 60% = 3/5.

Since Samantha spent 40 minutes in total for homework, the 40 minutes would be the denominator. Let's have the variable "x" equal how many minutes she spent on language arts. If we line up the fractions, it will be like this:

3/5 = x/40

Since we know 5 x 8 = 40, we would also multiply the numerator by 8.

3 x 8 =24.

So, Samantha spent 24/40 minutes on ELA, which is 60% of the total time.

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