1/2 t-4(2+t)=20 1/2 t-8-4t=20 least common multiple=2 t-16-8t=40 -7t=40+16 -7t=56 t=56/-7=-8
Answer: t=-8
To check -8/2 - 4(2-8)=-4-4(-6)=-4+24=20
You do it just exactly as the question says: Take one choice, substitute it in place of 't' in the given equation, and see if the equation becomes a true statement.
I'll do 'A' for you:
Does 't' = 8 ? Let's see. If it does, then (1/2) (8) - 4(2 + 8) = 20
( 4 ) - 4( 10 ) = 20
( 4 ) - 40 = 20
-36 = 20 .
Is that a true statement ? Is -36 = 20 ? I don't think so. => 't' is not 8 . 'A' is not the correct choice.
Now go ahead and try 'B'. _________________________________
It might be faster and easier to just take the equation and solve it. Then you'll know what 't' is, and you won't have to try any suggestions.
Here's the equation: (1/2) (t) - 4(2 + t) = 20
Eliminate parentheses on the left side: 1/2 t - 8 - 4t = 20
Combine the 't's on the left side: -3.5 t - 8 = 20
Add 8 to each side: -3.5 t = 28
Multiply each side by -1 : 3.5 t = -28
Divide each side by 3.5 : t = - 8 .
Now you can look back at the choices and see that 'B' is the one you want.
The sum of two numbers is 17.The difference of those same two numbers is 3. Find the two numbers, and their equations
Answers
a+b= 17 a-b=3 a=10 b=7 That is the answer
Help please it is easy but I haven't ate dinner
Answers
77 people because you do 2 into 154 and then get 77.
What is 6000 as a percentage
Answers
that doesn't make sense. but 6000/100 = 60%
If a carpenter charge $825 for 15hr plus $278 for materials.. What is the carpenters rate per hr
Answers
In this question, there are several information's already given. Let us first write them down for solving the question. Amount of money charged by the carpenter for 15 hours = $825 Then Amount of money charged by the carpenter per hour = 825/15 dollars = 55 dollars So the carpenters rate per hour is $55. The cost of the material has no significance with the carpenters rate per hour.The cost of the material hasno significance with the carpenter’s rate per hour. The material cost canchange as per the customers need. So it cannot be added to the carpenters perhour rate.
Question:- If a carpenter charge $825 for 15hr plus $278 for materials.. What is the carpenters rate per hr
Answer:-
Now, since we need to find the rate per hour, we divide or set up a proportion.
825/15 = x/1
Cross multiply
825*1 = 825 15*x = 15x
15x = 825
Divide
15x/15 = 825/15 x= 825/15 x= 55
Now, since they told us that materials are also in the price, we need to add that too.
$55 per hour + 278 dollars for materials
55+278 = 333
But since the rate means how much, we do not need to include any materials cost.
We have our final answer: $55 per hour
How many names are for square
Answers
Rhombus,parallelogram, quadrilateral..i dont think cube is one because a cube is 3-D and square is not
I only know of two, square and a cube is just a model.