The equations are 30+2x and 16+5x. i plug random numbers into x until you fint the correct answer. the answer is 5.
Step-by-step explanation:
Hey there!
Given;
The points is; (-1 , 2) and slope is 4.
<em>Note:</em><em> </em><em>Use </em><em>one-point</em><em> formula</em><em>.</em>
<em>
</em>
<em>~</em><em> </em><em>Put </em><em>all</em><em> values</em><em>.</em>

~ Simplify it.


Therefore, the required equation is; 4x-y+6=0.
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<em><u>Hope</u></em><em><u> it</u></em><em><u> helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em></h3>
Step-by-step explanation:
first you find 60% of 357.50 which is $214.50. Next you would add $357.50+214.50=572
so the awnser is
the sale price of a popular smart phone is $572.
Hope this helps!!