The equation 2/3x + 4 = 2x is sometimes true, specifically when x = 3. For any other values of x, it is not true.
The equation you've provided is 2/3x + 4 = 2x. To determine whether this is always, sometimes, or never true, we can solve for x. Start by subtracting 2/3x from both sides of the equation to isolate the term with 'x' on one side. This yields 4 = 2x - 2/3x, or 4 = 4/3x. If we divide both sides by 4/3 (or multiply by the reciprocal 3/4) to further isolate x, we get x = 3. Thus, the equation is true for x = 3 and not true for any other value of x, so it's not always true but sometimes true.
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Answer:
She did not use a random sample, and she tried to show cause and effect with an observational study.
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Answer:
$223.21
Step-by-step explanation:
Last year the amount of taxes was x, an unknown amount. That was 100% of last year's tax cost.
This year, taxes went up by 12%, so this year the taxes are 112% of what they were last year. This year the taxes were 112% of x, and they were $250.
112% of x = 250
1.12x = 250
x = 250/1.12
x = 223.21
Answer: $223.21
4
3
9
[?] units
18x^2y-2y
Answer:
2y( 3x-1)(3x+1)
Step-by-step explanation:
18x^2y-2y
Factor out the greatest common factor 2y
2y( 9x^2 -1)
The term in the parentheses is the difference of squares
a^2 - b^2 = (a-b)(a+b)
2y( 3x-1)(3x+1)
A. 7.546
B. 7.55
C. 7
D. 7.5