Answer:
r=5
Step-by-step explanation:
r+2=7
r=5
ANSWER:
y intercept = (0,-6/5)
x intercept = (-3,0)
EXPLANATION:
To find the y intercept you have to substitute the x with zero because the y intercept always lies on the y axis which means that they will always have the coordinates (0,y)
The same goes for the x intercept. To find the x intercept you have to substitute the y with zero because the x intercept always lies on the x axis which means that they will always have the coordinates (x,0)
WORKING OUT:
Given=2x+5x= -6
The y intercept)
x=0
2(0)+5y= -6
5y= -6
y = -6/5 (divide each side of the equation by t to get the y alone)
y intercept = (0,-6/5)
The x intercept)
y=0
2x+5(0)= -6
2x= -6
x = -3 (divide each side of the equation by t to get the x alone)
x intercept = (-3,0)
Area=LengthxWidth so 3/5=7/8xWidth. To get width by itself you must divide both sides by 7/8. When dividing fractions you can flip the fraction and multiply so multiply (3/5)(8/7). To do this just multiply the numerators and denominators to get 24/35 so width = 24/35
6x^2 - 2x + 1 is a quadratic formula from the form ax^2 + bx + c. This form of equation represents a parabola.
Finding 6x^2 - 2x + 1 = 0, means that you need to find the zeroes of the equation.
Δ = b^2 - 4ac
If Δ>0, the equation admits 2 zeroes and 6x^2 - 2x + 1 = 0 exists for 2 values of x.
If Δ<0, the equation doesn't admit any zero, and 6x^2 - 2x + 1 = 0 doesn't exist since the parabola doesn't intersect with the axe X'X
If Δ=0, the equation admits 1 zero, which means that the peak of the parabola is touching the axe X'X.
In 6x^2 - 2x + 1, a=6, b=-2, and c =1.
Δ= b^2 - 4ac
Δ=(-2)^2 - 4(6)(1)
Δ= 4 - 24
Δ= -20
Δ<0 so the parabola doesn't intersect with the Axe X'X, which means there's no solution for 6x^2 - 2x + 1 = 0.
I've added a picture of the parabola represented by this equation under the answer.
Hope this Helps! :)