MATHEMATICS MIDDLE SCHOOL

Solve the systems of equations.
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solve the systems of equations. ​ - 1

Answers

Answer 1
Answer:

Answer:

x = -1 and y = -1

Step-by-step explanation:

Solve 3x+3y=−6;−x+y=0

Steps:

I will solve your system by substitution.

−x+y=0;3x+3y=−6

Step: Solve−x+y=0for y:

−x+y+x=0+x(Add x to both sides)

y=x

Step: Substitutexforyin3x+3y=−6:

3x+3y=−6

3x+3x=−6

6x=−6(Simplify both sides of the equation)

6x

6

=

−6

6

(Divide both sides by 6)

x=−1

Step: Substitute−1forxiny=x:

y=x

y=−1

Answer:

x=−1 and y=−1
Answer 2
Answer:

if you isolate y in the bottom equation youll see that x=y so if you plug in y for x in the top equation youll get 6y=-6 then divide both sides by 6 to get y=-1 and since y=x x=-1

so it would be the last option where x and y both equal -1

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Half the sum of a number,x, and 15 is at most the sum of the opposite of twice the number 1.25. What is the range of possible values for the number? WILL BE REWARDED THE BRAINIEST ANSWER plz help by TODAY

Answers

The range of possible values is all numbers less than or equal to -2.5

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Answers

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What decimal is not equivalent 4.07 4.070 4.70 4.0700

Answers

4.70 is not equivalent.
4.07 4.070 and 4.0700 are equivalent. You can add thousand zeros to 4.07 and its value does not change

After completing a 10 hour walk, Chester Snowman goes inside to get warm. As he sits by the fire, he starts to melt at a rate of 3 inches per hour. Starting at the height he reached at the end of his walk, determine Chester's height after sitting by the fire for 10 hours.

Answers


We can't tell you the height after sitting by the fire
for 10 hours, because you didn't tell us the height
he reached at the end of his walk.

All we can tell you is that whatever his height was
when he came in to get warm, it's

             (10 hours) x (3 inches/hour)  =  30 inches

shorter after 10 hours by the fire.

Y=5x+8. Is this a direct variation?

Answers

No, it's not. Y has to have a direct variation with x. The equation for direct variation is y=kx. If the equation was y=5x, then it would be direct variation, but since it has two constants in the equation, it is not a direct variation. Hope this helps. 

Sammy drinks 1/3 of the milk carton, Tikki drinks 5/12 of the milk carton, and Georgia drinks 1/6 of the milk carton. What fraction of the carton of milk is left over?

Answers

1/3 of the milk carton+ 5/12 of the milk carton+ 1/6 of the milk carton
= (4+5+2)/12 of the milk carton (common denominator).
= 11/12 of the milk carton.

Sammy, Tikki, and Georgia totally drink 11/12 of the milk carton.

1 milk carton- 11/12 of the milk carton
= 12/12 of the milk carton- 11/12 of the milk carton
= 1/12 of the milk carton.

There is 1/12 of the milk carton left over, so the final answer is 1/12 of the milk carton.

Hope this helps~ 
First we need to make all the fractions have the same denominator so our denominator is going to be 12 so 1/3=4/12
5/12 we are going to leave it untouched because it already has a denominator of 12 and 1/6=2/12 so
4/12+5/12+2/12=11/12
Now you are going to subtract 12/12-11/12 because 12/12 represents a whole so 12/12-11/12=1/12 so you have 1/12 of the milk left
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