Solve for y by simplifying both sides of the equation, then isolating the variable.
y = 7x/2 - 3
Answer:
<h2><em><u> 42.8 in</u></em></h2>
Step-by-step explanation:
Step one:
given data
we are told that the expression for the depth of a lake after x years is given by

Required
The value of y when x= 4
Step two:
substitute the value of x in the expression to get y

<em><u>After 4 years the depth will increase by 42.8 in</u></em>
23 inches
x = mindy's height
2x - 20 = 66
-20 -20
2x = 46
/2 /2
x = 23
Using the Sine Rule:-
20 /sin 45 = BC / sin 30
BC = 20 sin 30 / sin45
= 20 * 1/2 / 1 / sqrt2
= 20 * 1/2 * sqrt2
= 10 sqrt2 answer
Answer: 1.61
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Work Shown:
tan(angle) = opposite/adjacent
tan(J) = IK/IJ
tan(J) = 45/28
tan(J) = 1.60714 approximately
tan(J) = 1.61