MATHEMATICS MIDDLE SCHOOL

80 is 160% of what number?

Answers

Answer 1
Answer: 160%=160/100 
Let the no. be x. 
160/100 *x=80 
1.6*x=80 
1.6x=80 
x=80/1.6 
x=800/16 
x=50 
Answer 2
Answer: 160/100*X=80=> X =100*80/160=100/2=50~~~~HAVE A NICE DAY!!!★★

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(-2a-4b-6c) - (-a - 2b +3c)

Answers

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▹ Answer

-a - 2b - 9c

▹ Step-by-Step Explanation

(-2a - 4b - 6c) - (-a - 2b + 3c)

Remove parentheses

-2a - 4b - 6c - (-a - 2b + 3c)

Collect like terms

-a - 4b - 6c + 2b - 3c

Final Answer

-a - 2b - 9c

Hope this helps!

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Brainliest is greatly appreciated!

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Answer: -a - 2b -9c

Step-by-step explanation:

-2a - (-a) = -a

-4b - (-2b) = -2b

-6c - (3c) = -9c

-a - 2b - 9c

Subtract 3a^2+5ab−4b^2 from 8a^2−6ab+4b^2

Answers

Answer:

\large\boxed{(8a^2-6ab+4b^2)-(3a^2+5ab-4b^2)=5a^2-11ab+8b^2}

Step-by-step explanation:

(8a^2-6ab+4b^2)-(3a^2+5ab-4b^2)\n\n=8a^2-6ab+4b^2-3a^2-5ab-(-4b^2)\n\n=8a^2-6ab+4b^2-3a^2-5ab+4b^2\qquad\text{combine like terms}\n\n=(8a^2-3a^2)+(-6ab-5ab)+(4b^2+4b^2)\n\n=5a^2-11ab+8b^2

Morgan and Leigh spend a certain amount of money from their money box each month to buy plants. The table shows the relationship between the amount of money (y) remaining in Morgan's money box and the number of months (x):

Function 1
Number of Months
(x) Amount Remaining (in dollars)
(y)
1 50
2 40
3 30
4 20


The equation shows the relationship between the amount of money (y) remaining in Leigh's money box and the number of months (x):

Function 2:
y = −9x + 60

Which statement explains which function shows a greater rate of change?
Function 1 shows a greater rate of change, because Morgan spends $10 each month and Leigh spends $9 each month.
Function 1 shows a greater rate of change, because Morgan spends $10 each month and Leigh spends $60 each month.
Function 2 shows a greater rate of change, because Morgan spends $10 each month and Leigh spends $60 each month.
Function 2 shows a greater rate of change, because Morgan spends $50 each month and Leigh spends −$9 each month.

Answers

the change for 1st function is -10 and rate of change of 2nd function is -9. Use the slope formula to find the  answer of 1st function.

Answer:

The first one since after each x interval the y is decreasing by 10 and in the second equation after each x interval the y is decreasing by 9

The first representation is the answer: Morgan

A building has a window that is 12 feet high. Stan is going to use a ladder to get up to the window and decides to keep the ladder 5 feet away from the side of the building. How long does the ladder need to be?

Answers

You have a triangle with legs 5 and 12
teh hypotenuse, or the length of the ladder, will be 13 feet

Danica wants to arrange her model cars in rows with exactly 6 cars in each row. She now has 23 model cars. What is the smallest number of additional cars she must buy in order to be able to arrange all her cars this way?

Answers

she needs to buy 1 more model car in order to have 4 rows of 6 model cars
she need to buy 1 more car for 4 rows of 6 cars.Hope this will help

Which is greater 2 miles or 3 kilometers

Answers

2 miles = 3.21869 kilometers

3.21869 > 3

Answer: 2 miles is greater than 3 kilometers.
We already know that 1 mile= 1.60934 km.

2 miles* (1.60934 km/ 1 mile)= 3.21868 km > 3 km.

The final answer is 2 miles > 3 km~
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