The expression that is not equivalent is the one that said - 4
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I don't like this computer aided instruction holding my hand. I'll ignore that at first so I can compare my solution to the one being taught.
We can see how a tan factors out; let's see what's left.


We need to factor out a sin x + cos x in the denominator so let's change one of the squared cosines to squared sine.




OK, now I can look at what they did.
First step ok, the box is 2 cos^2 x
Second step they changed the 1, box same as before: 2 cos^2 x
Third box matches our proof, cos^2 x
Fourth box our last box didn't change: cos^2 x
Fifth box: sin x + cos x
First, we have to understand the slope-intercept form.

A linear function/equation has three forms and the slope-intercept is one of the form. It is also commonly used in Function topic while the other two forms are commonly used in Analytic Geometry.
In the slope-intercept form, the m-term represents the slope while b-term represents the y-intercept of a graph.
<em>W</em><em>h</em><em>i</em><em>c</em><em>h</em><em> </em><em>e</em><em>q</em><em>u</em><em>a</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em><em>r</em><em>e</em><em>p</em><em>r</em><em>e</em><em>s</em><em>e</em><em>n</em><em>t</em><em>s</em><em> </em><em>a</em><em> </em><em>l</em><em>i</em><em>n</em><em>e</em><em>a</em><em>r</em><em> </em><em>f</em><em>u</em><em>n</em><em>c</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em><em>t</em><em>h</em><em>a</em><em>t</em><em> </em><em>h</em><em>a</em><em>s</em><em> </em><em>a</em><em> </em><em><u>s</u></em><em><u>l</u></em><em><u>o</u></em><em><u>p</u></em><em><u>e</u></em><em><u> </u></em><em><u>o</u></em><em><u>f</u></em><em><u> </u></em><em><u>5</u></em><em> </em><em>a</em><em>n</em><em>d</em><em> </em><em>a</em><em> </em><em><u>y</u></em><em><u>-</u></em><em><u>i</u></em><em><u>n</u></em><em><u>t</u></em><em><u>e</u></em><em><u>r</u></em><em><u>c</u></em><em><u>e</u></em><em><u>p</u></em><em><u>t</u></em><em><u> </u></em><em><u>o</u></em><em><u>f</u></em><em><u> </u></em><em><u>-</u></em><em><u>6</u></em><em><u>.</u></em>
As you notice the bold, italic and underlined words in the question that I quoted or rewrote. I've just explained that the slope is m-term and y-intercept is b-term.
Therefore, substitute m = 5 and b = -6 in the equation.

I hope this helps! Let me know if you have any questions regarding the linear function, don't hestitate to ask. Good luck with your assignment and have a nice day!
We calculate the total amount that needs to be paid by multiplying the amount per month and the total number of months.
Plan A: Total amount = ($110.42/month)(24 months) = $2650.08
Plan B: Total amount = ($85.47/month)(36 months) = $3076.92
Thus, Linda will pay a lesser amount for Plan A. Also, the amount that can be saved is $426.84.