MATHEMATICS MIDDLE SCHOOL

What is the value of x?
14 - x = 21
x = ?

Answers

Answer 1
Answer: Solve the equation
To find x, we do inverse operation. Inverse Operation is applying the opposite operation to the lonely number.
14-x=21
Inverse operation for positive 14 is -14
So we must apply that to both sides.
14-x=21
-14     -14
then we have -x=7
Because our variable has a -1x=7, we flip the signs so we get x=-7
So our final answer is x=-7

Check our work
14-x=21
14+7=21
CORRECT ANSWER! :)

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SOLVING SYSTEMS OF EQUASIONS BY ELIMINATION. -4x-2y=-12
4x+8y=-24

Answers

Your going to add the two equations to cancel out the x term. You get 6y=-36. Divide both sides by 6 and you get y=-6. Plug y in in your first equation and you'll get -4x-2(-6)=-12. Multiply the -2 by the -6 and you'll get -4x+12=-12. Subtract 12 from both sides and you get -4x=-24. Divide both sides by -4 and you get x=6. Your final answer is x=6, y=-6.
-4x-2y=-12
4x+8y=-24

Cancel out the x
6y=-36
Divide both sides by 6
y=-6

Substitute the value of y to any equation
-4x-2y=-12
-4x-2[-6]=-12
-4x+12=-12
-4x=-24
Divide both sides by -4
x=6

Does the equation represent a linear or nonlinear function explain 2x+3y=7

Answers

linear, because there is still a slope function (-2/3)

The equation is linear because you can rewrite it in slope-intercept form.

What is the approximate volume of a cylinder with a diameter of 10 meters and a height of 5 meters? Use 3.14 for pi.

Answers

157. Because when you multiply 10 times 3.14 times 5 you get 157.

3. Which relation is a function?A. {(-3, 4), (-3, 8), (6, 8)}
B. {(3, 4), (-3, 8), (6, 8)}
C. {(-3, 4), (3,-8), (3, 8)}
D. {(-3, 4), (3,5), (-3, 8))​

Answers

Answer:

B

Step-by-step explanation:

Recall that functions are defined only if for each value in the domain produces one and only one value in the range.

If we view the relations in the questions as x-y coordinates, this means that for every x-value, you can only have one y-value

Lets evaluate the options:

A) we can see that for x = -3, this gives 2 possible values for y i.e (-3,4) and (-3,8) (hence this is not a function)

C) we can see that for x = 3, this gives 2 possible values for y i.e (3,-8) and (3,8) (hence this is not a function)

D) we can see that for x = -3, this gives 2 possible values for y i.e (-3,4) and (-3,8) (hence this is not a function)

the only choice where this doesn't occur is choice B

I need help cuz i dont understand it

Answers

(-3,3) is the answer

Is 9 /12 rational or irrational

Answers

Rational because it is in form of a fraction
the answer is rational
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