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rahulshahi7569
11.01.2021 •
Mathematics
The options in the dropdown box for a) are: about 1.83 hours, about 2.05 hours, about 3.54 hours, and 5.51 hours.
the options in the dropdown box for b) are: about 1 hour, about 1.73 hours, about 3.02 hours, and about 4.75 hours.
the options in the dropdown box for c) are: about 1.56 hours, about 2.82 hours, about 3.64 hours, and about 5.71 hours.
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Ответ:
A: About 2.05 hours
B: about 1 hour
C: about 3.64 hours
Ответ:
B.
Step-by-step explanation:
If you simplify both sides and you have both sides in the form,
, if the the number in front of the variable,
is the same while the constant number,
, is different then you will have no solutions.
If you have same
and same
, then you have infinitely many solutions.
If you have different
then you have one solution.
Let's simplify both sides of A:
Distribute:
Combine like terms on left hand side:
The left hand side and right hand side have the same value no matter the x. This has infinitely many solutions.
Let's simplify both sides of B:
Distribute:
Combine like terms on either side:
This is going to have no solutions. If you thought about graphing y=4x+11 and y=4x+3 you would see that they are parallel and never cross.
You could also try and solve it.
Subtract 4x on both sides:
11 is never 3.
11 isn't 3.
11=3 is not true which means there is no
satisfying the equation labeled B.
Let's simplify both sides of C:
Distribute:
Combine like terms on either side:
This is going to have one solution.
We can solve it and see.
Subtract 4x on both sides:
Subtract 15 on both sides:
Divide both sides by 2:
0 is the one number that will make both sides the same for equation C.
Let's simplify both sides of D:
Distribute:
Combine like terms on left hand side:
These are the exact same expression on both sides and therefore will have the same value no matter the value of x you choose to plug in.
There are infinitely many solutions.