number is 21
let the number be n then dividing by 3 gives and adding - 3 gives
- 3 = 4 ( add 3 to both sides )
= 7 ( multiply both sides by 3 )
n = 3 × 7 = 21
Let the first digit of the 2-digit number be x and the second digit be y.
Then the ratio (x/y) equals (1/2). Write a formula for y in terms of x.
The tens digit is 2 more than the units digit. Using the letters x and y, write out the proper equation.
Now solve your two equations simultaneously for x and y.
Their responses are summarized in the following table.... ... 200 families whether or not they were homeowners and how many cars they had.
Answer:
Step-by-step explanation:
equation of line formula:
m = slope
c = y-intercept
1) find m
slope formula:
take 2 coordinates from the given graph and substitute the values into the slope formula
i) (-1,0)
ii) (3,2)
substitute the values into the slope formula
2) find the half equation of the line by substituting the value of m into the equation of line formula
3) find c by substituting either coordinate into the half equation
(3,2)
x = 3
y = 2
4) find equation of line by substituting the value of c into the half equation
Answer:
Step-by-step explanation:
our function is
f(x)=-0.7x
we are asked to determine the inverse of the above function . In order to do so we put f(x) = y and separate x in terms of y and in the final answer , we replace x with y and x with f'(x)
let us see how do we do that
y=-0.7x
dividing both sides by -0.7 we get
we replace x with y and x with f'(x)