A point belongs to the x axis if its y coordinate equals zero.
The points on a graph are in the form , so these points are on the x axis if and only if
In this case, we have
You can observe that your expression is actually a squared binomial: using
you can notice that
So, you have
Now, how we decide if this function "touches" or "passes through" the x-axis at x=7? Well, since our function is a square, it is never negative. So, this graph can't cross the x-axis, but rater touch it from above. The parabola has a U shape, and the point of minimum lies on the x axis.
So, the graph touches the x axis at x=7.
92/2 gives you how many they sold in one month, which is 46. now add that to 92 to get how many to buy in 3 months.
92+46=138.
they need a minimum of 138 jeans
Answer:
9) x = 5
10) x = 4
Step-by-step explanation:
a^2 + b^2 = c^2
9) 6^2 + x^2 = 8^2
- 36 + x^2 = 64
- 36 - 36
_______________
x^2 = 28
Square root them
Squareroot x^2 is x
Square root 28 is 5.29 round is 5
so x = 5
*Correct me if im wrong*
10) 3^2 + x^2 = 5^2
9 + x^2 = 25
- 9 - 9
____________________
x^2= 16
Square root them
square root of x ^2 is x and square root of 16 is 4
so x = 4
Answer:
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Step-by-step explanation:
Make a systems of equations:
11x+13y=209
x+y=19