Write an equation of the line in whose slope is 3 and passes through the point (1,2).

Question

hartnn · Answer

hello @Brianawhodat :)
$\Huge \mathcal{\text{Welcome To OpenStudy}\ddot\smile} $

the equation of line with slope m and point (x1,y1) will be 
$\large y-y_1=m(x-x_1)$

in your question, m=3, x1 = 1, y1=2
just plug in values!

anonymous · Answer

Thank you so much

hartnn · Answer

welcome ^_^
if you want me to verify your answer, just post what you got, i'll verify :)

rishabh.mission · Answer

for more such problem http://www.regentsprep.org/Regents/math/geometry/GCG1/EqLines.htm

anonymous · Answer

Marcy has a total of100 dimes and quarters. If the total value of the coins is $14.05, how many dimes and quarters does she have?

hartnn · Answer

Let q equal the number of quarters and d equal the number of dimes. 
Since total coins = 100,
 q + d = 100 -----Equation (1)

At 25¢ for each q, the value of the quarters is 25q.
At 10¢ for each d, the value of the dimes is 10d.
Together they add up to 1405¢
so, other equation will be
 25q + 10d = 1405 ----Equation (2)

got these 2 equations ??
can you solve them ?

anonymous · Answer

Yes. Thank you again

hartnn · Answer

welcome ^_^
don't forget to click on 'Best Response' tab on any reply of anyone who helps you :)
have fun learning with openstudy :)