I NEED HELP ASAP I MAY GIVE BRAINLIEST

Answer: 3

Step-by-step explanation: 15% of the people surveyed had both a cat and a dog, so you would find 15% of 20. Find 15% of 20 by doing 20 x .15

Answer:

ABD = 140
DBC = 40

Step-by-step explanation:

What is shown is a supplementary angle. These types of angles equal 180 degrees.

So that means whatever angle measures is in the supplementary angle added together would equal 180.

The equation to solve this would be (15x - 4) + (5x - 8) = 180

First, I would combine like terms. The 15x and 5x can be combined together to make 20x and the -4 and -8 would be equal to -12.

The simplified equation is now 20x - 12 = 180.

Next, we need to get rid of the 12. So we add 12 to both sides.

(20x - 12) + 12 leaves 20x by itself

180 + 12 = 192

Our equation is now 20x = 192

Next, we have to make sure that the x is by itself. To do this, we have to divide each side by 20.

20x/20 leaves us with just x.

192/20 is 9.6

x is equal to 9.6

Finally, we plug in the variable's value back into the angle measures to find their value.

15(9.6) - 4 = 140

5(9.6) - 8 = 40

Therefore, ABD is 140 degrees and angle DBC is 40 degrees.

Checking our work:

To check if our work is right, we can add up the angle measures to see if it's equal to 180.

140 + 40 is 180, so we are correct.

I apologize if that was a lot to read, but I hope you understand!

Answer:

$75

Step-by-step explanation:

Answer:

$28.83

Step-by-step explanation:

We will use:  \(\frac{part}{whole}=\frac{percent}{100}\) and then use cross multiplication.

Let's solve the first sale

We have:

percent = 25%

whole = $200

we want to solve for "part". Lets set the equation up before we plug anything in

\(part*100=percent*whole\)

\(part = (\frac{percent*whole}{100} )\)

now plug everything in:

\(part = (\frac{25*200}{100} )\)

part = $50

what does this mean?

Well it actually means $50 is the amount of money we take away from our original price of $200.

So we subtract that from our total.

$200 - $50 = $150

Next we will do the second sale.

percent = 50%

whole = $150

Use the same equation as above:

\(part = (\frac{50*150}{100} )\)

part = $75

Answer:

$75.00

Step-by-step explanation:

Step-by-step explanation:

Let's solve this problem using a system of equations.

Let's assume that Jorge invested x dollars at 4% interest and (5000 - x) dollars at 7% interest.

The interest earned from the 4% investment can be calculated as (4/100) * x.

The interest earned from the 7% investment can be calculated as (7/100) * (5000 - x).

According to the problem, the total return at the end of the year was $320. Therefore, we can set up the following equation:

(4/100) * x + (7/100) * (5000 - x) = 320

Simplifying and solving for x:

(4/100) * x + (7/100) * 5000 - (7/100) * x = 320

0.04x + 0.07(5000 - x) = 320

0.04x + 350 - 0.07x = 320

-0.03x = -30

x = -30 / -0.03

x = 1000

Jorge invested $1000 at 4% interest and the remaining amount, $5000 - $1000 = $4000, at 7% interest.

Therefore, Jorge invested $1000 at 4% and $4000 at 7%.

To find f(f^(-1)(9)), we need to first find f^(-1)(9), the inverse of f(9).

Given that f(4) = 9, we know that f^(-1)(9) is equal to 4.

Therefore, f(f^(-1)(9)) is equivalent to f(4).

Given that f(4) = 9 according to the problem statement, we can conclude that f(f^(-1)(9)) = 9.

Answer:

1. 4

2. y = sqrt(-x-2), domain: (-infinity, infinity)

3. (-infinity, infinity), (-infinity, infinity)

4. [0, infinity), [0, infinity)

5. 1/y^2

Answer:

Please mark me the brainliest

Step-by-step explanation:

The three equivalent equations are:

1. Negative 5 + x = negative 2

2. 2 + x = 5

3. x + 1 = 4

Explanation:

1. Negative 5 + x = negative 2 can be solved by adding 5 to both sides, which gives x = 3.

2. 2 + x = 5 can be solved by subtracting 2 from both sides, which gives x = 3.

3. x + 1 = 4 can be solved by subtracting 1 from both sides, which gives x = 3.

Therefore, the three equivalent equations are those where x = 3. The other equation, 9 + x = 6, can be solved by subtracting 9 from both sides, which gives x = -3, and is not equivalent to the other three equations. Similarly, x + (negative 4) = 7 can be solved by adding 4 to both sides, which gives x = 11, and is also not equivalent to the other three equations.

To estimate the volume using the Midpoint Rule with \(\displaystyle n=5\), we need to divide the interval \(\displaystyle 0\leq x\leq 1\) into \(\displaystyle n\) subintervals of equal width. Since \(\displaystyle n=5\), each subinterval will have a width of \(\displaystyle \Delta x=\frac{1-0}{5}=\frac{1}{5}\).

Now, let's calculate the volume using the Midpoint Rule. The formula for the volume obtained by rotating about the y-axis is:

\(\displaystyle V\approx 2\pi \sum _{i=1}^{n}y_{i}\Delta x\)

where \(\displaystyle y_{i}\) represents the value of the function \(\displaystyle y=\sqrt{1+x^{3}}\) evaluated at the midpoint of each subinterval.

First, let's find the midpoints of the subintervals. Since the width of each subinterval is \(\displaystyle \Delta x=\frac{1}{5}\), the midpoint of the \(\displaystyle i\)-th subinterval is given by:

\(\displaystyle x_{i}=\frac{\Delta x}{2}+\left( i-\frac{1}{2}\right) \Delta x=\frac{1}{10}+\left( i-\frac{1}{2}\right) \frac{1}{5}\)

Substituting \(\displaystyle x_{i}\) into the function \(\displaystyle y=\sqrt{1+x^{3}}\), we obtain:

\(\displaystyle y_{i}=\sqrt{1+\left( \frac{1}{10}+\left( i-\frac{1}{2}\right) \frac{1}{5}\right) ^{3}}\)

Now, we can calculate the approximate volume using the Midpoint Rule:

\(\displaystyle V\approx 2\pi \sum _{i=1}^{5}y_{i}\Delta x\)

Substituting the values of \(\displaystyle y_{i}\) and \(\displaystyle \Delta x\) into the formula, we can evaluate the sum and compute the estimated volume.

\(\huge{\mathfrak{\colorbox{black}{\textcolor{lime}{I\:hope\:this\:helps\:!\:\:}}}}\)

♥️ \(\large{\underline{\textcolor{red}{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}\)

Answer:

1. 32x=20    

2. 8x+5

Step-by-step explanation:

Answer:

10 3/4

Step-by-step explanation:

\(x + \frac{7}{4} = - \frac{5}{2} \times - \frac{5}{1} \\ x = \frac{25}{2} - \frac{7}{4} \\ x = \frac{43}{4} \\ x = 10 + \frac{3}{4} \)

Answer:

Step-by-step explanation:

Point A

Answer:

A

Step-by-step explanation:

right on edg 2021

Answer: y=x-20

Step-by-step explanation:

(90,70) will be x1,y2. (30,10) will be x1,y1. Put these values into the slope formula, which is y2-y1/x2-x1. 70-10/90-30. 60/60=1. The slope is 1. Now to find the slope-intercept equation, use point slope form which is y-y1=m(x-x1). y-10=1(x-30). Distribute the 1 to the terms in the parenthesis. y-10=x-30. Add 10 to both sides to eliminate 10. y-10+10=x-30+10. y=x-20.

Answer:

y = 70x + 35

Step-by-step explanation:

$75 - $5 = $70 (this is the amount charged minus the amount needed to get the job done per car wash)

the +35 is the tips extra/ constant that will be added after the jobs are done.

x is the amount of car washes done

y would be the profit received.

thus y = 70x + 35 (profit = value of car wash * number of cars washed + tips)

Answer:

Step-by-step explanation:

Profit = Income less outgo

         = (car wash income + tips) - (supplies)

$250 = ($75n + $35) - ($5n), or

$215  = $70n     (where n represents the number of cars washed)

This comes out to n = $215/$70, or approximately 3 car washes.

Answer:

slope= -1

y-intercept = 24

Step-by-step explanation:

2x +2y=24

2x-24=-2y

divide by then u get:

-1x + 12= y

-1 is ur slope

y-intercept

let x=0

y= -1(0)+12

y =0+12

y = 12

Answer:

Step-by-step explanation:

The probability of rolling a number less than or equal to 5 on a fair number cube (also known as a fair six-sided die) is 5/6.

Justification: A fair number cube has six sides, numbered 1 through 6. Out of these six numbers, there are five numbers (1, 2, 3, 4, and 5) that are less than or equal to 5. Therefore, the favorable outcomes are 5, and the total possible outcomes are 6. Thus, the probability is 5/6.

Answer:

Step-by-step explanation:

you are completely right please follow your heart <3

Answer:

9

Step-by-step explanation:

1.5(185 - 15x) = 237 - 18x

solve for x

x = 9

Answer:

nuts: no nuts

1 : 4

Step-by-step explanation:

1 out of every 5 have nuts

5-1 = 4

That means 4 do not have nuts

nuts: no nuts

1 : 4

Answer:

1 : 4

Hope this helps!

Answer:

The two expressions are:

4x -2 = 3 and 4x + -2 = 3

Step-by-step explanation:

-2 + 4x = 3 ---- 4x -2 = 3   ------------ 4x + -2 = 3

                           +2  +2                        - 2  +2

                    ------------------              ----------------        

                         4x = 5                         4x = 5

                         ----   ----                      -----  -----

                          4      4                         4      4

                 x = 1.25 or 1  1/4               x = 1.25 or 1  1/4

Answer:

See below:

Step-by-step explanation:

Hello! I hope you are having a nice day.

We can solve this equation in a single step, we just need a bit of theory and a graph.

We can first see that its in \(y=mx+b\) form. Which is also known as Slope-Intercept form.

This means that we know the following.

Since we know that, we can see that from our equation that the slope of the line is 3 and the y intercept is (0,-7).

Now that we've gotten that, we can start graphing.

The y intercept is -7 so we can plot (0,-7) as one of our points.

The slope of 3 means that we got up 3 units then right a single unit.

Therefore, another point could be (1,-4).

With our two points, we can create our graph by creating a straight line through those two points and therefore plotting our line.

Cheers!

Answer:

Step-by-step explanation:

y = 3x - 7 is a linear equation with y-intercept -7 (or    (0, -7)   ) and slope 3.  These two quantities are instantly readable from the equation.

There are several ways in which we may graph this equation.  One is to plot the y-intercept (0, -7)  Then choose an x-value, such as 3, and evaluate the function at that x value.  We see that y = 9 - 7, or y = 2, when x = 3. Then another point on the graph besides (0, -7) is (3, 2).  Plot (3, 2) and then draw a line through the two plotted points.

Here's another way:

The slope here is 3, or 3/1, which represents rise / run.  Plot (0, -7) as before.

Move your pencil from (0, -7) 1 space to the right and 7 spaces up.  Then plot a new point at that location.  Draw a line through (0, -7) and (1, 0).

Answer:

192 hours per day / 8 hours per person per day = 24 people

Step-by-step explanation:

Assuming each person works for 8 hours a day, the total number of hours needed to complete the project is:

720 person-days x 8 hours = 5,760 hours

To complete the project in 30 days, the total number of hours needed per day is:

5,760 hours / 30 days = 192 hours per day

Answer:

A. 31.5

Step-by-step explanation:

14.5^2+28^2=c^2

994.25 find the square root

31.53...

Answer:

answer 31.5

Step-by-step explanation: