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Question 229960: Greetings~
I need to evaluate the variable expression when a= -2, b=4, c= -1, and d=3.
on problem -2/3d- 1/5(bd-ac)=
This is what I have tried:
Solution
distribute the values to the variables:
-2/3(3) - 1/5(4(3) - (-2)(-1))=
simplify equation with parentheses:
-2/3(3) - 1/5(12 -3)=
simplify more:
-2/3(3) - 1/5(9)=
simplify multiplication:
-2/3 * 3/1 + -1/5 * 9/1=
multiply numerators and denominators:
(-2 * 3)/(3 * 1) + (-1 * 9)/ (5 * 1)=
simply:
-6/3 + -9/5=
find common denominator:
(-6*5)/(3*5) + (-9*3)/(5*1)=
simplify:
-30/15 + -27/15=
add numerators:
(-30 + -27)/15=
simplify:
-57/15=
find lowest common multiple:
(-57/3)/(15/3)=
simplify:
-19/5
Thanks =)
Click here to see answer by stanbon(75887) |
Question 229960: Greetings~
I need to evaluate the variable expression when a= -2, b=4, c= -1, and d=3.
on problem -2/3d- 1/5(bd-ac)=
This is what I have tried:
Solution
distribute the values to the variables:
-2/3(3) - 1/5(4(3) - (-2)(-1))=
simplify equation with parentheses:
-2/3(3) - 1/5(12 -3)=
simplify more:
-2/3(3) - 1/5(9)=
simplify multiplication:
-2/3 * 3/1 + -1/5 * 9/1=
multiply numerators and denominators:
(-2 * 3)/(3 * 1) + (-1 * 9)/ (5 * 1)=
simply:
-6/3 + -9/5=
find common denominator:
(-6*5)/(3*5) + (-9*3)/(5*1)=
simplify:
-30/15 + -27/15=
add numerators:
(-30 + -27)/15=
simplify:
-57/15=
find lowest common multiple:
(-57/3)/(15/3)=
simplify:
-19/5
Thanks =)
Click here to see answer by rfer(16322) |
Question 232285: my question is:a plumer charges $30 per hour and $42 for each hour of overtime. For a job, the plumer works 3 regular hours, h over time hours, and charges $195 for new parts. The total amount of the bill for the job is $390. Write an solve an equation ti find the number of over time hours the plumber worked. What i really need help on is how to write an equation for it. please help.
Click here to see answer by stanbon(75887) |
Question 232289: a class of 42 students and 2 teachers plan a trip to an observatory. The class has raised $485 for the trip. Admission is $5 per person and bus rental is $230. With the remaining money, the class can invite guests to fill the remaining seats on the bus. Write and solve an equation to find the number of guests (G) the class can invite. Can u please help me make an equation for the problem and explain it for me please:)
Click here to see answer by eggsarecool(46) |
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