Can you guys help me with fractions I forgot over the summer. Please explain easily.
$Can you guys help me with fractions I forgot over - 1$

Answers

Answer 1

Answer: So in order to add the fractions together you need to first find a common denominator. For the very first problem you can use 63 as a denominator because 7*9=63. Now for the numerator. So you have 4/7 and 8/9. We just multiplied 7 by 9 so now we need to do that for 4 also. 4*9=36. Now we have 36/63. For 8/9 we multiply 8 by 7 to get 56. Now we have 36/63 + 56/63. Once you add those together you simplify your answer.

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Find the simplest expression for the perimeter of the triangular roof truss.side 1: 3a+4

side 3: 2a-7

side 2: 9a+11

Answers

perimeter of triangle = all sides added up
3a + 4 + 2a - 7 + 9a + 11

now add like terms
3a + 2a + 9a = 5a + 9a = 14a

4 - 7 + 11
= -3 + 11 = 8

so we have 14a + 8
as our simplest expression

In 1950, there were 40.3 million cars registered in the United States. In 1990, there were 133.7 million cars registered in the United States. What was the percent increase of registered cars from 1950 to 1990?

Answers

$(133.7)/(40.3)*100\%\approx331,76\%$

Final answer:

The number of registered cars in the US increased by about 231.76% from 1950 to 1990, calculated by finding the difference between the two given values, then dividing this by the initial value and multiplying by 100 to get the answer as a percentage.

Explanation:

The question is asking for a percent increase in the number of registered cars in the United States from 1950 to 1990. To calculate a percent increase, you first need to determine the amount of the increase, then divide this by the original amount, and multiply by 100 to get the answer in percent form.

The number of registered cars in the United States increased from 40.3 million in 1950 to 133.7 million in 1990. The amount of increase is therefore 133.7 (1990 number) - 40.3 (1950 number) = 93.4 million.

Next, we find the percent increase by dividing the increase by the original (1950) amount and multiplying by 100: (93.4 / 40.3) x 100 = Approximately 231.76%. So, there was roughly a 231.76% increase in the number of registered cars in the United States from 1950 to 1990.

Learn more about Percentage Increase here:

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You and your friend are selling tickets to a charity event. You sell 8 adult tickets and 6 student tickets for $126. Your friend sells 12 adult tickets and 13 student tickets for $209. What is the cost of a student ticket?

Answers

s=cost per student ticket
a=cost per adult ticket

value=(students vlue)+(adults value)
student value=(cost per student) times number of students
adult value=(cost per adult) times number of adults

you sell 8 adult and 6 students and that is a value of 126
8a+6s=126

friend sell12 adult and 13 student and get 209
12a+13s=209

so we have
8a+6s=126 and
12a+13s=209
it might help to simplify the first equaiton by dividing by 2
4a+3s=63

we have
4a+3s=63
12a+13s=209
multiply first equaton by -3
-12a-9s=-189

add to secont equaiton

12a+13s=209
-12a-9s=-189 +
0a+4s=20

4s=20
divide 4
s=5

each student ticket costs $5.00

a rectangular prism is 11 3/5 meters long and 9 meters wide and 12 1/2 meters high what is the volume in cubic meters of the prism

Answers

volume=legntht imes widht time height
volume=11 and 3/5 times 9 times 12 and 1/2
volue=11 and 6/10 times 9 times 12 and 5/10
volume=11.6 times 9 times 12.5
volume=1305 m^3

ok so all you need to is this 11 3/5*9*12 1/2=1,305
1,305 cubic meters is there anything else
i can help you with today?

A grocery store receipt shows 5% state tax due on laundry detergent and a flower bouquet. Does it matter whether the tax is calculated on each separate item or the total cost? Explain.

Answers

Calculated on each separate item because, the 5% is PER ITEM for example here in Florida, there is a 7% tax but no tax on unprepared food, but if you go to Whole Foods and buy 4 burgers and a head of lettuce they tax for each burger because if it was for the total cost they would be taxing for the head of lettuce which is not what the state law says you can do.

Will the following product be positive or negative!(-6)^4

A. Positive
B. Negative

Answers

should be A. Positive

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