Find the percent change from 72 to 90.

Answers

Answer 1

Answer: Percent change = [(90 - 72) / 72] x 100 = 25%
This is an increase, because 90-72=+18

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Solve using the substitution method 3x+2y=11
X-2=4y

A(12,-5/2)
b (0,-1/2)
C (0,-2)
D (4,-1/2)

Answers

$\left \{ {{3x+2y=11\ \ \ \ \ \ \ } \atop {x-2y=4y\ \ | add\ 2y}} \right.\n\n \left \{ {{3x+2y=11} \atop {x=4y+2y}} \right.\n\nsubstitution\ method\n\n3(4y+2y)+2y=11\n\n3*6y+2y=11\n\n18y+2y=11\n\n20y=11\ \ \ | divide\ by\ 20\n\ny=(11)/(20)\n\nx=6y=6* (11)/(20)=(66)/(20)=(33)/(10)\n\n$

I know this is already answered but this is the answer simplified

(4, -1/2)

This is to help those that didn't understand the first guys explanation.

The amounts of paper waste generated in a region during two years were 41,300,000 tons and 50,500,000 tons. What was the total paper waste generated over these two years in the region, expressed in scientific notation?

Answers

So first you need to add the two years together to get 91,800,000 from there you can start to turn it into scientific notations. First start out by putting an imaginary decimal point at the end so you have 91,800,000. From there you need to move the decimal next to the 9 so 7 spots to the left. This means that when you are converting back from SN you would go 7 spots to the right. Therefore when you write this in SN you will have 10 to the power of positive 7.Now that you have the number and the exponent you just put them together and you have 9.18 x 10^7 . I hope this helped and if you have any questions about how I got this answer feel free to message me.

Just add 41,300,000 to 50,500,000. That is 91,300,000.00 tons. Scientific Notation just moves the decimal point to the beginning. So it would be 9.13*10^7

Someone please help me!!!!!!!What is the slope of the line through (-2,5) and (4, 9)?

A. slope = 2/3
B. slope =3/2
C. slope = 2

Answers

(4 - -2) / (9 - 5) = 6/4 or 3/2

Organizers for a high school graduation have set up chairs in two sections. They put 126 chairs for the graduates in the front section and 588 chairs for guests in the back section. If all rows have the same number of chairs, what is the greatest number of chairs possible for a row?

Answers

we will find the greatest common factor of numbers 126 and 588
It 42

42 would be the greatest amount of chairs in a row. This is a very simple question. All you have to do is find the GCF using a method such as birthday cake/ladder or prime factorization. Using this, you can find the GCF to be 42.

2/5+1/4+1/10= I need the answer

Answers

I believe your answer would be 3/4

The high temperature on Friday was 8 degrees above zero. The low temperature was 3 degrees below zero. Which expression gives the average of the low and high temperatures?Please hurry I am timed

Answers

Answer:

Option 2, (-3+8)/2

Step-by-step explanation:

Average: Sum of two numbers/ How many numbers

Sum: -3+8

Amount of Numbers: 2

(-3+8)/2

The answer is B

Took the test

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