admin

2 months ago

Guest #3975

2 months ago

N+2n+2 < 50

Combine like terms 3n+2< 50

Subtract 2 from both sides 3n<48

Divided both sides by 3

n<16

Combine like terms 3n+2< 50

Subtract 2 from both sides 3n<48

Divided both sides by 3

n<16

Question

A beach club made profits of $39,100 in May and $59,200 in August. What is the rate of change in the average monthly profit for this time period?

Solution 1

6,700 per month subtract 59200 from 39,100=20100

Divide by 3 because thatâ€™s the differences in month

20100 divide by 3 is 6700

Divide by 3 because thatâ€™s the differences in month

20100 divide by 3 is 6700

Question

a rectangular porch has dimentions of (x+12) and (x+5) feet. If thr aria of the porch floor is 120 square feet, what is its length and width?

Solution 1

We have (x+12)Â·(x+5) = 120; where x > 0;

Then, x^2 + 17x + 60 = 120;

x^2 + 17x - 60 = 0;

The solutions are x1 = +3 and x2 = -20;

Then, x = 3 is the correct solution.

Finally, x + 12 = 15 feet (length) and x + 5 = 8 feet (width).

Then, x^2 + 17x + 60 = 120;

x^2 + 17x - 60 = 0;

The solutions are x1 = +3 and x2 = -20;

Then, x = 3 is the correct solution.

Finally, x + 12 = 15 feet (length) and x + 5 = 8 feet (width).

Question

Y=2x-1
3y=6x-5
Please help

Solution 1

I gotchu this time buddy so substitute 2x-1 for the second equation: 3(2x-1)=6x-5

Distribute 3x :6x-3=6x-5

Subtract 6x from both sides

-3=-5 which is not true so the answer is no solution

Distribute 3x :6x-3=6x-5

Subtract 6x from both sides

-3=-5 which is not true so the answer is no solution

Question

The graph of linear equation A passes thru the points (-7,4) and (3,-10), while the graph of linear equation B passes thru the points (-7,4) and (5,11). which of these is a solution to the system of equations consisting of linear equation A and B a. (-7,4)
b. (3,-10)
c. (5,11)
d. (7,4)
show work and i need really bad

Solution 1

We want to find the solution for the** system of linear equations** such that we know some points of the** lines. **We will see that the correct option is A:** (-7, 4).**

When we have a **system of equations** the solutions are the points where the graphs of the equations **intercept**.

Here we know that we have two lines:

- Line A passes through (-7, 4) and (3, - 10)
- Line B passes through (-7, 4) and (5, 11).

So we already can see that both **lines **pass through the point (7, -4), meaning that the lines do **intercept **at that point, so the solution of the **system** is that point (we know that we don't have more solutions because lines __intercept only once__).

So the correct option is A: **(-7, 4)**

If you want to learn more about **systems of equations**, you can read:

Solution 2

Is it A since it passes thru both equations

Question

Student Stars Mazie 7 Chris 4 Jenni -3 Scott 0 Michael 2 Zoe 4 Liza -5 Thomas -1 Benjamin 6 Josie 1 Chase 8 David -4 Students in Mr. Miller's class gain and lose stars for behavior during the day. At the end of the week, any students with a negative star value must stay for detention. According to the chart who must serve detention?

Solution 1

The students with negative star values are Jenni, Liza, Thomas, and David. Therefore, these four students must serve detention.

Question

A cup has 4 pencils, 3 black pens, 1 blue pen, and 5 red pens. What is the probability of selecting a black or blue pen?

Solution 1

The probability of selecting a black or blue pen is 4 out of 13. You calculate this by adding the amount of pens together and comparing it to the total amount of pens and pencils in the cup.

Solution 2

4 out of 13 because in total there are 13 supplies in all and if you add 3 black pens PLUS 1 blue pen that will be 4.

Question

Solve the system of equations for 7x+2y=16 and -21x-6y=24

Solution 1

Simplifying

7x + 2y = 16

Solving

7x + 2y = 16

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2y' to each side of the equation.

7x + 2y + -2y = 16 + -2y

Combine like terms: 2y + -2y = 0

7x + 0 = 16 + -2y

7x = 16 + -2y

Divide each side by '7'.

x = 2.285714286 + -0.2857142857y

Simplifying

x = 2.285714286 + -0.2857142857y

7x + 2y = 16

Solving

7x + 2y = 16

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2y' to each side of the equation.

7x + 2y + -2y = 16 + -2y

Combine like terms: 2y + -2y = 0

7x + 0 = 16 + -2y

7x = 16 + -2y

Divide each side by '7'.

x = 2.285714286 + -0.2857142857y

Simplifying

x = 2.285714286 + -0.2857142857y

Question

Luther won 12 of the last 20 video games he played. Suppose Luther plays a total of 60 games with his friends over the next month. Predict how many of these games Luther will win.

Solution 1

36 games. 20x3 is 60 and 12x3 is 36

Question

Eli takes a typing test and types all of 300 words in 1/10 hour. He takes the test a second time and types the words in 1/12 hour. Was he faster or slower on the second attempt?

Solution 1

Slower on the second attempt because 1/12 =0.083

Repeating

While 1/10 = .1

Repeating

While 1/10 = .1

Question

Spining a spinner that has 5 equal section marked 1 through 5 and landing on an evean number

Solution 1

Judging on how the only even numbers between 1 and 5 are 2 and 4. You would use a calculator and do 2Ã·5 and it will come out as .40 meaning 40%! So there is a 40% chance of landing on a even number! Hope I helped!

Mathematics
2647929

History
842281

English
748681

Biology
586256

Social Studies
406852

Chemistry
368373

Business
348603

Physics
324927

Health
199835

Spanish
130075

Geography
112100

Computers and Technology
106146

Arts
77164

Advanced Placement (AP)
23675

World Languages
23213

French
22589

Engineering
19607

Law
17108

Medicine
13966

SAT
10987

German
3389

High School
3423409

Middle School
2092250

College
1518097