MATHEMATICS MIDDLE SCHOOL

Is anyone good at elimination method? I will give 10 points to the person that answer the question. :)Jill wants to solve the following system using the elimination method:

y = x + 8
y = 3x − 11

What number should the equation y = x + 8 be multiplied by to eliminate x?

Answers

Answer 1
Answer: To eliminate x, the coefficients of x's in both equations should be opposite numbers. Since the coefficient of x in the second equation is 3, the coefficient in the first equation should be -3. So she should multiply the first equation by -3.
Answer 2
Answer: -3! 
-3y=-3x-24
y=3x-11
-2y=-35
y=17.5

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What value is the 6 in 49.62

Answers

The value of the "6" in 49.62 is in the tenth place
The value of 6 in 49.62 is 0.6 OR six tenths

Find the seventh term of each sequence
1, -3, 9, -27.....

Answers


multilply by negative three to find the next term. 1, -3, 9, -27, 81, -243, 729, which is the seventh term.

Which choice describes a question that could be answered by moving the decimal point 3 places to the right?A.
multiplying 31.04 by 100

B.
multiplying 31.04 by 1,000

C.
dividing 31.04 by 102

D.
dividing 31.04 by 103

Answers

The answer is B.

When we multiply by 1000, we move the decimal place 3 times to the right(or add 3 zeroes).

Just count the number of zeroes and move it that many places to the right(if it starts with '1').
multiplying 31.04 by 1000 = 31040

X+2/8=1/2 what is x explain how you got the answer

Answers

x= 1/4

x+2/8 = 1/2
   -2/8   -2/8

x=1/4

(7n + 2)(4n+8)
What is the answer?

Answers

Answer:

28n2+64n+16

Step-by-step explanation:
28n² + 56n + 8n + 16
= 28n² + 64n + 16

Carl runs around a track 1.17 min how long would it take him to run 1.5 laps at his rate?( round to 2 places)

Answers

Answer

It will take Carl 1.76 minutes to run 1.5 laps

Explanation

We know from our problem that Chris runs a lap in 1.17 minutes, so he will run half a lap in half the time:  (1.17)/(2) =0.585 minutes.

We have the time it takes Chris to run 1 lap and the time it takes him to run half (0.5) laps, so, to find how long it takes him to run 1.5 laps, we just need to add the two times:

Total time = 1.17 minutes + 0.585 minutes

Total time= 1.755

Since we need to round to two places, we check if the number after the 2nd place  is 5 or bigger; if it is, we add 1 to the number on the 2nd place. The number after the 2nd place is 5, so we add 1 to the 5 in the 2nd place to get:

Total time = 1.76 minutes

Carl will run 1.5 laps in 1.76 minutes
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