Three-sevenths of a number is 21. find the number.

the number is 9
the number is 27
the number is 49

Step-by-step explanation:

The number is 49, First do 21 / 3 to find what 1/7 of the number is. We get 7, so we know 1/7 is 7 so if we do 7 x 7 we will have 7/7 or one whole and 7x7 is 49. Hope this helps

The number is 49

Step-by-step explanation:

Let the number be x

From the question,  of   x   =   21

                                  × x  = 21

                                  = 21

Multiply both-side of the equation by 7

                                    × 7 = 21 × 7

(On the left-hand side of the equation, 7 at the numerator will cancel-out 7 at the denominator leaving us with just 3x)

                                      3x  = 147

Divide both-side of the equation by 3

                                        =  

(On the left-hand side of the equation 3 at the numerator will cancel-out 3 at the denominator, while on the right-hand side of the equation 147 will be divided by 3)

                            x  =

                              x=49

Therefore the number is 49

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.

the answer is (-4,-4)

hope this ! : d