72- 8x9 - 4 x 4 and 3x3- 2x2x3x3
100-10x10
Answer:
Step-by-step explanation:
Please enclose the fractional coefficient inside parentheses: y= (1/2x) − 3 for greater clarity.
Make a table of ordered pairs:
x y = (1/2)x - 3
0 -3
1 (1/2)(1) - 3 = -2 1/2
3 (1/2)(3) - 3 = -3/2
The y-intercept is the point at which x = 0, and (from the table) is -3. Plot a dark dot at (0, -3).
Now graph (3, -3/2), leaving a dark dot.
Draw a line thrugh (0, -3) and (3, -3/2).
Boys : Girls = 2:7
let the no. of boys be x
so no of girls = 250+x
so, x:(250+x) = 2:7
x/(250+x) = 2/7
7x = 500+2x
7x-2x = 500
x = 500/5 =100
Answer:
47.80
Step-by-step explanation:
jejjdbdiehejee
1) 2 points:
We need to come up with a function that intersects the graph at two points, meaning has two (x,y) in common with the function. If you look at the graph of y=x^2, you see that it would be quite easy to draw a line that intersects the graph twice. In fact, there are an infinite number of functions that would satisfy this.
One easy function is y=2. This is a horizontal line in which y=2 for all values of x. In the graph y=x^2, y=2 intersects twice.
2=x^2
x^2= √2 or -√2
the shared points are (√2,2) and (-√2,2)
b) one point:
Here, we want to find an equation with only one (x,y) in common with y=x². This is a bit trickier.
One easy solution is y=-x²
Looking at a graph of the two functions, you see that y=-x² is a reflection across the x-axis of y= x². The two functions have only one point in common: (0,0).
c) no point in common
Take another look at the graph of y=x². You see that the function never crosses the x-axis. A simple function that will never intersect the graph is y=-2. Since y is negative for all values of x, it is guaranteed to never intersect y=x², a function in which y is positive for all negative or positive values of x.
