PLEASE HELP!!!

You install two antivirus programs in your computer. One of the programs has a reliability of 65%, while the other one has a reliability of 51%. What is the probability that neither program will be effective when a virus attacks your computer?

Answer:

10 x^2 + 8 x + 1

Step-by-step explanation:

Simplify the following:

8 x^2 + 2 x^2 + 7 x + x - 3 + 4

Grouping like terms, 8 x^2 + 2 x^2 + 7 x + x - 3 + 4 = (2 x^2 + 8 x^2) + (x + 7 x) + (4 - 3):

(2 x^2 + 8 x^2) + (x + 7 x) + (4 - 3)

2 x^2 + 8 x^2 = 10 x^2:

10 x^2 + (x + 7 x) + (4 - 3)

x + 7 x = 8 x:

10 x^2 + 8 x + (4 - 3)

4 - 3 = 1:

Answer: 10 x^2 + 8 x + 1

Answer:

[tex]10 {x}^{2} + 8x + 1[/tex]

Step-by-step explanation:

[tex]2 {x}^{2} + x + 4 -3 + 7x + 8 {x}^{2} \\ = 2 {x}^{2} + 8 {x}^{2} + x + 7x + 4 - 3 \\ = 10 {x}^{2} + 8x + 1[/tex]

Answer:

Camila

Step-by-step explanation:

you take 1/5 and make it 2/10. Then you see that there are 10 slices and since Beth and Camila ate in 10th's, Beth at 2 slices and Camila ate 3. So since Alice ate 2 slices its less than Camila. Therefore, Camila ate the most slices.

Answer:

I think the answer is  y = 2 x minus 3 and y = negative 2 x minus 3 .

I'm sorry if it's incorrect

Step-by-step explanation:

Answer:

A.

Step-by-step explanation:

Answer:

4 cups of milk

Step-by-step explanation:

Answer:

In order to make enough rice pudding for 8 servings, you would need four cups of milk.

Step-by-step explanation:

First, identify what you know:

1) It takes 2 1/2 (2.5) cups of milk to make enough rice pudding for five people.

Simply, calculate how much is needed for one serving.

2.5/5 = 0.5

Now, we know that one serving of rice pudding requires 1/2 of a cup of milk. So, simply multiple by 8, to find how much is needed for 8 servings.

0.5 x 8 = 4 cups

Four cups of milk would be needed to make rice pudding for 8 servings.  

Answer:

B

Step-by-step explanation:

im pretty sure it's b and I AM SOOOO SORRY if its not

Answer: 120

Step-by-step explanation: If you multiply 480 by 0.75 (because 6/8 = 0.75) Then you will get 360. After doing so subtract 360 from 480 (480-350) and you will get 120

The cube of twice a number is [tex]2x^3[/tex].

This question is incomplete because the diagram of the sphere was not shown. Find attached to this answer the diagram for the sphere.

Answer:

a) The correct volume of the sphere = 113cm³

b) b) Hal's likely error was that

i) He used the wrong formula which is Surface area of the sphere(4πr²) in his calculation instead of the right formula which was the Volume of a Sphere(4/3πr³)

ii) In addition to using the wrong formula, Hal did not use π in his calculation.

Step-by-step explanation:

a) The Volume of a Sphere = 4/3πr³

From the attached diagram, the radius of the sphere was given as = 3cm

π = 3.14

The volume of the sphere = 4/3 × 3.14 × 3³

= 113.04 cm³

We were told to round up to the nearest hundredth. Therefore, correct the volume of the sphere = 113cm³.

b) Hal's likely error was that

i) He used the wrong formula which is Surface area of the sphere(4πr²) in his calculation instead of the right formula which was the Volume of a Sphere(4/3πr³)

ii) In addition to using the wrong formula, Hal did not use π in his calculation.

This means:

Surface Area of a Sphere = 4πr²

But Hal's used = 4r²

Where r = 3cm = 4 × (3cm)² = 36

Answer:

180 sq ft

Step-by-step explanation:

1/2 x 18 x 20 = 180

Answer:

a: 180 square feet

Step-by-step explanation:

Answer:

scatter plot. i believe.

Step-by-step explanation:

Final answer:

A graph that displays a collection of ordered pairs is known as a scatter plot, which shows the relationship between two variables using a Cartesian coordinate system.

Explanation:

A graph that displays a collection of ordered pairs is called a scatter plot. A scatter plot, also known as a scatter diagram, uses Cartesian coordinates to display values for two variables. It is a pictorial representation of the relationships of quantitative data, presenting individual points where the value of one variable determines the position on the horizontal axis (x-axis), and the value of the other variable determines the position on the vertical axis (y-axis). The pattern of these points on the graph helps to visualize any correlation between the variables being analyzed.

Answer:

The age of the spear head is of 1938 yers.

Step-by-step explanation:

The amount of carbon 14 after years is given by the following equation:

[tex]Q(t) = Q(0)e^{-rt}[/tex]

In which Q(0) is the initial amount and r is the decay rate.

The half life of carbon 14 is 5700 years.

This means that [tex]Q(5700) = 0.5Q(0)[/tex]

So

[tex]Q(t) = Q(0)e^{-rt}[/tex]

[tex]0.5Q(0) = Q(0)e^{-5700r}[/tex]

[tex]e^{-5700r} = 0.5[/tex]

[tex]\ln{e^{-5700r}} = \ln{0.5}[/tex]

[tex]-5700r = \ln{0.5}[/tex]

[tex]5700r = -\ln{0.5}[/tex]

[tex]r = -\frac{\ln{0.5}}{5700}[/tex]

[tex]r = 0.00012160476[/tex]

So

[tex]Q(t) = Q(0)e^{-0.00012160476t}[/tex]

We have to find:

t for which Q(t) = 0.79Q(0). So

[tex]Q(t) = Q(0)e^{-0.00012160476t}[/tex]

[tex]0.79Q(0) = Q(0)e^{-0.00012160476t}[/tex]

[tex]e^{-0.00012160476t} = 0.79[/tex]

[tex]\ln{e^{-0.00012160476t}} = \ln{0.79}[/tex]

[tex]-0.00012160476t = \ln{0.79}[/tex]

[tex]0.00012160476t = -\ln{0.79}[/tex]

[tex]t = \frac{-\ln{0.79}}{0.00012160476}[/tex]

[tex]t = 1938.43[/tex]

Rounding to the nearest year.

The age of the spear head is of 1938 yers.

Answer:

The actual answer is 2357

Answer:

x=3

Step-by-step explanation:

mark me brainliest

Answer:

the answer on edge 2021 is b) y=log3x

Step-by-step explanation:

Answer:

3.31 Should be irrational. If it can be made into a fraction than its rational if not then it would be known as irrational.

Answer:

56 divided by 8 would equal or just 56/8=

Step-by-step explanation:

If you want to find how many packs there are, it would be 56 divided by 8 would equal p.

The letters in the word D-I-N-O-S-A-U-R can be arranged in 40,320 ways.

To find the number of ways the letters in the word D-I-N-O-S-A-U-R can be arranged, we can use the concept of permutations.

The word D-I-N-O-S-A-U-R contains 8 different letters. To find the number of arrangements, we can use the formula for calculating permutations of n objects taken all at a time, which is n!. In this case, n is equal to 8, so the number of arrangements is 8!.

However, there are some repeated letters in the word D-I-N-O-S-A-U-R.

The letter 'A' is repeated twice. To account for the repetition, we divide the total number of arrangements by the factorial of the number of times each repeated letter occurs.

In this case, 'A' appears twice, so we divide by 2!. So the final answer is 8! / 2!.

Simplifying the expression, we have 8! / 2! = 40,320.

Answer:

8

Step-by-step explanation:

Answer: 8

Step-by-step explanation:

Answer:

A = (x + 15)(x + 10) − 5

Step-by-step explanation:

(x+15)(x+10)-5=A would be a solution

To make this easier, let's assign x a value. Let's say 3.

(3+15)(3+10)-5=A

(18)(13)-5=A

234-5=A

A=229

Now with this, we put x in the answer choice and the answer that gives an area of 229 is correct.

A. A=(3+20)(3+10)+12=(23)(13)+12=299+12=311 Answer A is wrong.

B. A=(3+20)(3+10)-12=(23)(13)-12=299-12=287 Answer B is wrong.

C. A=(3+26)(3+15)=(29)(18)=522 Answer C is wrong.

D. A=(3+14)(3+8)=(17)(11)=187 Answer D is wrong.

It's either I'm wrong or the answer choices are wrong.

New answer choices!

A. A=(3+20)(3+11)

=(23)(14)=322 Answer A is wrong.

B. A=(3+15)(3+10)+5

=(18)(13)+5=234+5=239  Answer B is wrong.

C. A=(3+15)(3+10)−5

=(18)(13)-5=234-5=229 Answer C is correct.

D. A=(3+9)(3+10)=(12)(13)=156 Answer D is wrong.

A = (x + 15)(x + 10) − 5

(x+15)(x+10)-5=A would be a solution

To make this easier, let's assign x a value. Let's say 3.

(3+15)(3+10)-5=A

(18)(13)-5=A

234-5=A

A=229

Now with this, we put x in the answer choice and the answer that gives an area of 229 is correct.

A. A=(3+20)(3+11)

=(23)(14)=322 Answer A is wrong.

B. A=(3+15)(3+10)+5

=(18)(13)+5=234+5=239  Answer B is wrong.

C. A=(3+15)(3+10)−5

=(18)(13)-5=234-5=229 Answer C is correct.

D. A=(3+9)(3+10)=(12)(13)=156 Answer D is wrong.

The question probable may be:

Marissa is painting her rectangular patio, with the exception of a bench that does not need to be painted:

Write an equation to determine the area, A, of the patio that will be painted.

A. A=(3+20)(3+11)

B. A=(3+15)(3+10)+5

C. A=(3+15)(3+10)−5

D. A=(3+9)(3+10)=(12)(13)=156

Answer:

1,280

The dimensions are 5 by 4

Step-by-step explanation:

You multiply 20 and 16 then, divide 0.25 then you get 1,280

Answer:

Y = -3 Times X - 1

Step-by-step explanation:

y = mx + c

Here, m is the slope & c is the y-intercept

y = -3x - 1

Slope = -3

y intercept = -1

Answer:

The answer is 42

Step-by-step explanation:

and what he most likely did was

He subtracted 48 from 180 instead of 90.

YOUR WELCOME

Answer:

Check attachment for the diagram

Step-by-step explanation:

Given two points A and B in the diagram attached, we see that exactly one line exists between these points.

Answer:

The diagram is attached with this answer

Step-by-step explanation:

In the diagram there are two points, point P and point Q. It is impossible to have more than one line between these points, so exactly one line exists between them.

Answer:

26+31=h

Step-by-step explanation:

Answer:

26+31h=d

Step-by-step explanation:

the 26 represents the 26 hot dogs he already sold during the pregame show. The 31h represents 31 hot dogs multiplied by the amount of hours he sells them for. And finally, d represents how many hot dogs he sold in total. Hope that helps!

Answer:

7.5

Step-by-step explanation:

7.2 + 8.5 + 7.0 + 8.1 + 6.7 = 37.5

37.5÷5 = 7.5

Answer:

7.5

Step-by-step explanation:

The mean is 7.5

Answer:

Step-by-step explanation:

~~~~~~~~~~~~~~~

QUESTION 1: B

Half of a circle is 180. One side is 27° and the one in the middle is a right angle which is 90°. So we must add the sides together than subtract them by 180°.

                                                90° + 27° = 117°

                                               180° - 117° = 63°

So now we know that angle A is 63°!

Angle C is adjacent to angle A making it 63° as well. We also know that angle B is adjacent so that means angle B is 117°.

Only B is is the correct answer.

~~~~~~~~~~

QUESTION 2: x = 20

150° is adjacent to 7x + 10 making them equal. But how do we solve this? We must make a linear equation out of this!

                                              150 = 7x + 10

Subtract 10 on each side,

                                              150 = 7x + 10

                                              - 10          - 10

We get,

                                               140 = 7x

Divide by 7 on each side,

                                          140 ÷ 7 = 7x ÷ 7

Evaluate,

                                                  20 = x

We get that our answer is x = 20!

~~~~~~~~~~~~~~~~~~

QUESTION 3: x = 21.8°

We know that x° + 68.2° = 90° or a right angle. Therefore for this problem we must subtract!

90° - 68.2° = 21.8°

For this question x is 21.8°

~~~~~~~~~~~~~~~~~~~~~

QUESTION 4:

For this question we know that 4x + 8x = 180° we must solve this linear equation out!

                                             4x + 8x = 180°

Add,

                                                   12x = 180°

Divide by 12,

                                           12x ÷ 12 = 180° ÷ 12

Evaluate,

                                                      x = 15

We now know that x = 15 which solves our 4th and final question of the day! Phew! That took a lot of brain power but we made it! Nice job everyone!

Answer:

1) d. All of the above are true

2) b. 21.8°

3) 7x + 10 = 150 ; x = 20°

4) b. The measure of angle B is 117°

Step-by-step explanation:

1) 4x + 8x = 180

12x = 180

x = 15°

4x = 60°

8x = 120°

2) x = 90 - 68.2

x = 21.8°

3) 7x + 10 = 150

(Vertically opposite angles)

7x = 140

x = 20°

4) Angle A = 180 - 90 - 27

Angle A = 63°

Angle B = 180 - 63

Angle B = 117°

Angle C = 180 - 117

Angle C = 63°

Answer:

the y intercept is 4

Step-by-step explanation:

the 4 is where the line starts so it would be (0,4)

First, notice that this equation is written in slope-intercept form which is more commonly known as y = mx + b form where the multiplier, m, or the coefficient of the ex term represents the slope of the line and the b or the constant term represents the y-intercept of the line.

I have attached slope-intercept form below.

Notice that below, the b is in place of the 4 in the equation.

So the y-intercept or the b is 4.

Answer:

D. 1,019 square feet

Step-by-step explanation:

10x13x8 - 3x7

John will need to paint 347 square feet of wall in his rectangular basement after subtracting the area of the door that will not be painted.

John will paint the four walls of his rectangular basement. To calculate how many square feet of wall he will need to paint, we must first determine the total area of the walls and then subtract the area of the door.

The total wall area is calculated as follows:

Two walls are 10 feet long and 8 feet high, giving 2 x (10 x 8) = 160 square feet.

The other two walls are 13 feet wide and 8 feet high, giving 2 x (13 x 8) = 208 square feet.

So, the total wall area is 160 + 208 = 368 square feet.

The door measures 3 feet by 7 feet, which equals 21 square feet.

To find the area John will paint, we subtract the area of the door from the total wall area:

368 square feet - 21 square feet = 347 square feet

Therefore, John will need to paint 347 square feet of wall.

Answer:

8.6 grams of the substance remains after 30 years.

The amount of the substance will drop to below 20 grams in 14 years.

Step-by-step explanation:

The amount of the substance after t years is given by the following equation:

[tex]A(t) = A(0)(1-r)^{t}[/tex]

In which A(0) is the initial amount and r is the yearly decay rate.

A radioactive element decays at a rate of 5% annually. There are 40 grams of the substance present.

This means, respectively, that [tex]r = 0.05, A(0) = 40[/tex]

So

[tex]A(t) = A(0)(1-r)^{t}[/tex]

[tex]A(t) = 40(0.95)^{t}[/tex]

How much of the substance remains after 30 years (to the nearest tenth)?

This is A(30).

[tex]A(30) = 40(0.95)^{30} = 8.6[/tex]

8.6 grams of the substance remains after 30 years

When will the amount of the substance drop to below 20 grams (to the nearest year)?

This is t when A(t) = 20. So

[tex]A(t) = 40(0.95)^{t}[/tex]

[tex]20 = 40(0.95)^{t}[/tex]

[tex](0.95)^{t} = \frac{20}{40}[/tex]

[tex](0.95)^{t} = 0.5[/tex]

[tex]\log{(0.95)^{t}} = \log{0.5}[/tex]

[tex]t\log{0.95} = \log{0.5}[/tex]

[tex]t = \frac{\log{0.5}}{\log{0.95}}[/tex]

[tex]t = 13.51[/tex]

Rounding to the nearest year

The amount of the substance will drop to below 20 grams in 14 years.

1) The amount of substance that will remain after 30 years is; A(30) = 8.6 g

2) The time when the amount of the substance drop to below 20 grams is; t < 14 years

A(t) = A_o(e^(-rt))

Where;

A_o is initial amount

r is rate of decay

t is time in years

A(t) is amount left after t years

We are given;

A_o = 40 g

r = 5% = 0.05

1) To find the amount of substance left after 30 years is;

A(30) = 40 × e^(-0.05 × 30)

A(30) = 8.925 g

Approximating to the nearest tenth gives;

A(30) = 8.9 g

2) To find the time when the amount of the substance drop to below 20 grams.

20 > 40 × e^(-0.05 × t)

20/40 > e^(-0.05 × t)

-0.05t < In 0.5

t < (In 0.5)/-0.05

t < 13.86 years

Approximating to the nearest year gives;

t < 14 years

Read more at; https://brainly.com/question/1513353

Answer:

Y→X→Z

Step-by-step explanation:

i did the  test

The order of greatest to least solubility is Z > X > Y

An equation is an expression used to show the relationship between two or more numbers and variables.

x have 10 g of solute when dissolved in 500 ml of water, y have 12 g of solute when dissolved in 500 ml of water, and z have 8 g of solute when dissolved in 500 ml of water.

The order of greatest to least solubility is Z > X > y

Find out more on equation at: https://brainly.com/question/2972832

Answer: 100 boxes

Step-by-step explanation:

Hi, since 1 ton = 2,000 lbs

We have to divide 10lbs by 2000 to convert the lbs in tons.

1t/2000lb = xt / 10lb

10 /2000=0.005

0.005 ton = 10 lbs (1 bag)

Each box has 4 bags

0.005 ton x 4 = 0.02 ton

So each box weights 0.02 ton

Since we need 2 tons.

Using proportions:

0.02t/1 box= 2 t / x boxes

x = 2 / (0.02/1)

x = 100 boxes  

Feel free to ask for more if needed or if you did not understand something.