Answer: 7 miles/h and 1 miles/h
Step-by-step explanation:
With the speed of current = x + 1
Against the speed of current = x - 1
ATQ
4(x-1) = 3(x+1)
4x-4 = 3x+3
4x - 3x = 3+4
x = 7
Speed of boat = 7miles/h
Current of river = 1 miles/h
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Answer:
y =
x² - 2x + 1
Step-by-step explanation:
The equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
From the graph (h, k) = (2, - 1), thus
y = a(x - 2)² - 1
To find a substitute a point on the curve (0, 1) into the equation
1 = 4a - 1 ( add 1 to both sides )
4a = 2 ( divide both sides by 4 )
a =
=
, hence
y =
(x - 2)² - 1 ← in vertex form
Expand the factor and simplify
y =
(x² - 4x + 4) - 1
=
x² - 2x + 2 - 1
=
x² - 2x + 1 ← in standard form
Answer:
B
Step-by-step explanation:
Answer to number 16 is 27 and 17 is 2
Answer:
253,498.1?
Step-by-step explanation: