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bearhunter [10]
3 years ago
13

2. Solve the following system of equations using substitution.

Mathematics
1 answer:
SOVA2 [1]3 years ago
4 0
First, make sure you convert both equations into standard form. Your two equations would be 2x+2y=38 and -x+y=3. Then multiply the bottom by 2. So your new equations would be 2x+2y=38 and -2x+2y=6. The x would cancel out and you would continue solving for y. y would equal 11 and then you would plug it back into an original equation. When you plug and solve for x, you would get x=8. So your answer would be (8,11)
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Don has 6 pieces of pipe. Each piece is 2 feet 6 inches long.
Alex777 [14]

Answer: 15 feet

Step-by-step explanation:

First you start with 2ft and 6in and convert it all into into inches.

If you know that 1 ft=12in then you know that 2 feet is the same as saying

12+12=24. If you don't understand use this chart-

1 ft=12in

2ft= 24in

3ft= 36in

4ft =48in

5ft= 60in

6ft= 72in

see I am counting by 12's.

Now take 2ft and convert it into inches. That would be 24 in (look in the chart).

now take the 24in(2ft) and add it to the 6in. So 24+6 =30

So now you know that one piece of pipe is 30in long.

But in the text it states that Don has 6 pieces, so...

because it says that he has 6 pieces of pipe then you are going to take that and multiply that number(6) by how long each piece is. look up and it shows how long each pieces is. They are all each 30in long. Take 30 and multiply that by 6 because there are 6 pipes and you will get 120in.

But it says that they need an answer of feet and inches or just feet if it exactly a some sort of foot like 43feet or 2 feet.  

So then we are going to convert 180 into feet by dividing 180 by 12 and you get 15. So the answer is 15.

I hope this helps. Have fun learning!!

6 0
3 years ago
A textbook store sold a combined total of 289 sociology and math textbooks in a week. The number of math textbooks sold was 65 l
erica [24]

Answer:

Contradictrion

Step-by-step explanation:

First write an equation. If the total is 289, then that goes one the right side of the =. Sociology textbooks will be x. If there were 65 less than x, it will be 65-x. Lets set it up:

x + 65 -x =289

Then combine like terms.

65 = 289

There are no values of x that make the equation true. The input is a contradiction.

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<h2><u>NO ANSWER</u></h2>
8 0
3 years ago
What is the power notation of 125
loris [4]

Answer:

5³

Step-by-step explanation:

125 = 5 × 5 × 5 = 5³

8 0
3 years ago
Read 2 more answers
Translation of a 2D shape..<br> Due in tomorrow, please help! Xx
bazaltina [42]
(5,7) (5,4) (7,4) hope that helps
4 0
3 years ago
A) Complete the table of values for y = 6 - 2x
GREYUIT [131]

Step-by-step explanation:

the answer as shown in the photo

3 0
2 years ago
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