MATHEMATICS MIDDLE SCHOOL

How many solutions are there to the following system of equations?4x – 8y = 0
–3x + 8y = –7

A. 2
B. 1
C. 0
D. infinitely many

Answers

Answer 1
Answer: 4x-8y=0 \n\underline{-3x+8y=-7} \n4x-3x=0-7 \nx=-7 \n \n4x-8y=0 \n4 * (-7)-8y=0 \n-28-8y=0 \n-8y=28 \ny=(28)/(-8) \ny=-(7)/(2) \n \n \left \{ {{x=-7} \atop {y=-(7)/(2)}} \right.

There is one solution to this system of equations. The answer is B.
Answer 2
Answer: -4x-8y=0\n\underline{-3x+8y=-7}\n-7x=-7\nx=1 \Rightarrow B

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Maritzas car has 16 gallons of gas in the tank.She uses 3/4 of the gas.How many agllons of gas does Maritza use?

Answers

Answer:

If Maritzas used 3/4 of here gas then she used 12 gallons of gas

Same answer: If she used 3/4 of 16 then that would be 12 gallons of gas used

Stephanie goes shopping on Sunday. Shehas $60. After buying 20 chocolates, she
has $10 left. How much did each chocolate
cost

Answers

$60 - $10 = $50
$50 / 20 = $2.5 ea.

54.45 the 5 in the tens place is ? The value of the 5 in the hundredths place?

Answers

5 is in the tens place, 4 is in the ones place, the other 4 is in the tenths, and 5 is in the hundreths.
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PLEASE RESPOND IN DESCRIPTION. "Mrs. Wheeler goes to the bakery with $30. She purchases 2 loaves of bread for $3.50 each and a dozen donuts for$9. She plans to spend the remainder of her money on cookies that cost $1.50 each. What is the greatest number of cookies that Mrs. Wheeler can buy?"

Answers

Answer:

9

Step-by-step explanation:3.50

*2=7 + 9 = 16

30-16=14 1.50 * 9 =13.50$

Answer:

9.

Step-by-step explanation:

Bread = $7

12 donuts = $9

That equals $16.

Cookies cost $1.50,

$1.50 x 9 = $13.50.

One side of a triangle is 3 1/3 cm, another side is 2/3 cm shorter than the first side, and the third side is 1 2/3 cm longer than the first side. What is the perimeter of the triangle?Thanks so much

Answers

Good evening ,

_______

Answer:

perimeter = 22/3 cm

____________________

Step-by-step explanation:

Look at the photo below for the details.

:)
3 1/3 - 2/3 = 2 2/3
3 1/3+ 1 2/3 = 5
3 1/3 + 5 + 2 2/3 = 11

How to show your work for 9 divided by 2.43

Answers

Answer:

3.70

Step-by-step explanation:

9 divided by 2.43

To divide decimal numbers we need to remove the decimal point

(9)/(2.43) =(9 \ times \ 100)/(2.43 \ times \ 100) =(900)/(243)

Now use long division to divide the numbers

                                    3.70370

                               --------------------------------    

                  243          900

                                   729

                              ---------------------------(subtract)

                                   1710                      (add decimal point at top)

                                   1701

                              ---------------------------

                                       900                (add 0 at top)

                                        729  

                                ---------------------------(subtract)

                                          1710                      (add decimal point at top)

                                          1701

                                    ---------------------------

                                              9

So answer is 3.70
Just do normal division, just like ignore the decimal point. for a moment once you got your answer bring back the decimal point back up to your answer. You would get 0.27 as your answer.
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