Answer:
Breadth = 15 cm
Step-by-step explanation:
Area = length x breadth
315 = 21 x breadth
[ dividing both sides by 21 ]

Answer:
y-intercept: (0, 3)
Step-by-step explanation:
Attached is a screenshot of the plotted points (-1, 1) and (1, 5) on a graph. It shows that the line crosses the y-axis at point (0, 3) → which is the y-intercept.
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Answer:

Step-by-step explanation:
The given polynomial function is

According to the Rational Roots Theorem, the ratio of all factors of the constant term expressed over the factors of the leading coefficient.
The potential rational roots are




Answer:
x=1 if that's 15 x
Step-by-step explanation: