Answer:
x = 200
Step-by-step explanation:
Multiply by 4:
x + 120 + 2x = 720
3x = 600 . . . . . . collect terms, subtract 120
x = 200 . . . . . . . divide by 3
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<em>Check</em>
(200/4 +30) +(200/2) = 180
(50 +30) + 100 = 180
80 + 100 = 180 . . . . . true
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<em>Alternate solution</em>
If you like, you can simply work with the equation given.
(3/4)x + 30 = 180 . . . . collect terms
(3/4)x = 150 . . . . . . . . . subtract 30
x = 200 . . . . . . . . . . . . multiply by 4/3
The answer to your problem is C
C. To make identical copies of your genes
Answer:
(x-7)(x-7)
Step-by-step explanation:
this is a perfect square
x^2-14x+49
take the square of the first number,
X^2 = x times x
the sign of the second number
-14x= (-)
the square of the last number
49= 7x7
to check your work you foil it out
(x-7)(x-7)
x times x = X^2
x times -7= -7x
-7 times x = -7x
-7times -7= 49
then combine like terms
x^2-7x-7x+49 = x^2-14x+49
