If the sin 90 = 1 then which statement is true
1 answer:
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Karen has $30, Rafael has $75 and Shen has $25.
Step-by-step explanation:
Given,
Total amount they have = $130
Let,
Amount of Karen = x
Amount of Rafael = y
Amount of Shen = z
According to given statement;
x+y+z=130 Eqn 1
Shen has $5 less than what Karen have.
z = x-5 Eqn 2
Rafael has 3 times what Shen has;
y = 3z Eqn 3
Putting value of z from Eqn 2 in Eqn 3
Putting value of y and z from Eqn 4 and 2 in Eqn 1
Dividing both sides by 5
Putting x = 30 in Eqn 2
Putting z=25 in Eqn 3
Karen has $30, Rafael has $75 and Shen has $25.
Keywords: linear equations, substitution method
Learn more about linear equations at:
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Answer: 1
Step-by-step explanation:
First you need to multiply 3 x 3 (9), because that's all 3 squared means.
Now the equation should be 9x-6x+3=0
Next we need to combine like terms. Do 9x - 6x which should give you 3x
Now your equations should be 3x+3=0
Now for the somewhat harder part...
Under the three (the one without the x) write -3 and under the zero write the same thing. the +3-3 cancels out so just put a line or something across it.
0-3= -3
so now you should have...
3x=-3 ignore the 3x, at this point it's useless in getting the answer because it would cancel out.
-3 divided by -3 is 1 because a negative (-) divided by a negative (-) equals a positive (+).
The answer should be x = 1
