Answer:
1) The straight line on the graph below intercepts the two coordinate axes. The point where the line crosses the x-axis is called the [x-intercept]. The [y-intercept] is the point where the line crosses the y-axis. Notice that the y-intercept occurs where x = 0, and the x-intercept occurs where y = 0.
2) There's another important value associated with graphing a line on the coordinate plane. It's called the "y intercept" and it's the y value of the point where the line intersects the y- axis. For this line, the y-intercept is "negative 1." ... This point will always have an x coordinate of zero.
Step-by-step explanation:
Given : x + y = 99 ------------ [1]
Given : x² - y² = 99
We know that : (x² - y²) = (x + y)(x - y)
⇒ (x + y)(x - y) = 99
⇒ 99(x - y) = 99
⇒ x - y = 1 ------------- [2]
Adding Equation [1] and [2], we get :
⇒ (x + y) + (x - y) = 99 + 1
⇒ 2x = 100
⇒ x = 50
Substituting x = 50 in Equation [1], we get :
⇒ 50 + y = 99
⇒ y = 99 - 50
⇒ y = 49
So, The Ordered pair (x , y) = (50 , 49)
Answer(C)
√(9x^2)= 3x
√(18y^2)=3y/√2= 3y/√2 X √2/√2
=3√2y/2
Answer:
say x is the original price so
x - (20x/100) = 720
720 is the balance we got after deducting the original price,
therefore; 720 = (80x/100)
You can simply solve for x now.
answer:
x = 900
Answer:
or 
Step-by-step explanation:
Given
--- Point
The arc length of a function on interval [a,b]: 
By comparison:
Take square root of both sides
Split:
or 
To solve fo f(x), we make use of:
For:
Integrate:
We understand that it passes through .
So, we have:
Make c the subject
becomes
For:
Integrate:
We understand that it passes through .
So, we have:
Make c the subject
becomes
