Answer:
Positive to negiative and they counded by 2s for the positive one and 6s for the negative one.
Step-by-step explanation:
Answer:
b) i) Curve A
ii) - 1.75
iii) x = 1 - √5 or x = 1 + √5
Step-by-step explanation:
b) i) We are given a function y = x² - 2x - 3 and the graph of this function is also shown in the side diagram.
The equation can be rearranged to y = (x - 1)² - 4
⇒ (x - 1)² = y + 4
Therefore, this is an equation of a parabola having the vertex at (1,-4) point and its axis is parallel to the positive y-axis.
So, the curve A represents the equation given. (Answer)
ii) Now, at x = 2.5, f(x) = 2.5² - 2 × 2.5 - 3 = - 1.75 (Answer)
iii) When y = 1, then x² -2x - 3 = 1
⇒ x² - 2x - 4 = 0
⇒ (x - 1)² - 5 = 0
⇒ (x - 1)² - (√5)² = 0
⇒ (x - 1 + √5)(x - 1 - √5) = 0
⇒ x = 1 - √5 or x = 1 + √5 (Answer)
23÷5=4 with a remainder of $3. each avocada was 4$.
I think it is a rectangle..........But i'm not sure what are your options
Answer:
2,500 pages
Step-by-step explanation:
Let
y -----> the overall cost
x -----> the number of pages
we know that
HP printer
------> equation A
Samsung printer
-----> equation B
Solve the system by substitution
Substitute equation B in equation A
Solve for x
