2.25 can be written as 9/4 or 2 1/4
The x-intercept is a point whose y-coordinate is 0, so (x,0).
Substitute 0 for y in the equation:
The x-intercept is
.
Answer:
$3.75 + 6% tax
$3.75
tax: $0.22
Total price with sales tax: $3.97
Step-by-step explanation:
x= 3+√5/4,3-√5/4
Step-by-step explanation:
1.In general, given ax^2+bx+c=0, there exists two solutions where:
x= -b+√b^2 - 4ac/2a, -b-√b^2-4ac/2a
2.In this case, a=4, b=-6 and c=1.
x=6+√(-6)^2-4×4/2×4, 6-√(-6)^2-4×4/2×4
3.Simplify.
x=6+2√5/8, 6-√5/8
4.Simplify solutions.
x=3+√5/4, 3-√5/4