1)
x^2 - 49 = 0
factor
(x+7)(x-7) = 0
x+7 = 0; x = -7
x -7 = 0; x = 7
2)x^2 - 18x + 81 = 0
factor
(x- 9)(x - 9) = 0
x - 9=0; x = 9
3)
x^2 + 3x = 40
x^2+3x - 40 = 0
factor
(x + 8)(x - 5) = 0
x+8 = 0; x = -8
x -5 = 0; x = 5
4)
3x^2 - 75 = 0
3(x^2 - 25) = 0
3(x+5)(x-5) = 0
x + 5 = 0; x = -5
x - 5 = 0; x = 5
5)
2x^2 - 15 = 7x
2x^2 - 7x - 15 = 0
(2x + 3)(x - 5) = 0
2x+3 = 0; x = -3/2
x - 5= 0; x = 5
6)
4x^2 + 16x - 48 = 0
4(x^2 + 4x - 12) = 0
4(x + 6)(x - 2) = 0
x + 6 = 0; x = -6
x - 2 = 0 ; x = 2
Answer:
Answer is D = 121.51
Use the Compound Interest Formula
A = P (1 + (R/12)/100)^(12*n)
Run 2 case
P = 1700
R = 18.7, R = 12.5
n = 1 (as the problem is asking over the course of a year)
Solve for A for both the R and subtract the two values of A to obtain ~121.51
Step-by-step explanation:
The slope intercept form is y=mx+b. m is the slope, b is the y intercept,
I think the greatest possible error that may occur in this kind of question is how this measurements are measured and the units is either correct or not. The factor that you should consider in a measurement is first the accuracy, second is the unit and third is the correct conversion.
The correct graph should be the graph that has the same shape but shifted 2 units to the left
I hope you can see why