43.9k views
2 votes
I have no idea how to do this equation, please help

I have no idea how to do this equation, please help-example-1

1 Answer

2 votes
Put in the given numbers and you have two equations in two unknowns.
.. 10Ta +25Tb = 220
.. Ta +Tb = 10

It is convenient to solve this by substitution. Use the second equation to write an expression for Tb.
.. Tb = 10 -Ta
Now use this in the first equation.
.. 10Ta +25(10 -Ta) = 220
.. -15Ta +250 = 220 . . . . . . . collect terms
.. -15Ta = -30 . . . . . . . . . . . . . subtract 250
.. Ta = 2 . . . . . . . . . . . . . . . . . divide by the coefficient of Ta
.. Tb = 10 -2 = 8

Selection C is appropriate.
User Tgray
by
8.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories