Is a simple random sample (sometimes, always or never) valid?
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This is cuz it can be different in another sample like the random on. It can be different options or different opinions. When its different it can be valid OR invalid. It can always be a different thought from a different set of people/animals/books or whatever the case is. That is why your answer would be SOMETIMES.
Hope I helped ya!
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One way you can verify this is by drawing a bar model, and cut it into four. Color in three pieces.
Then, draw another bar model the same size as the first one, and cut it into five pieces.
Color in three pieces.
You can see that 3/4 has more shaded in area than 3/5.
Another way you can do this is by dividing the numerator by the denominator for both fractions.
Hope this helped.
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The answer is 4763. Hope that helped d:
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56,980 rounded to the nearest hundreds is 56,900.
To round the number 56,980 to the nearest hundreds, we need to look at the digit in the hundreds place, which is 9. The rule for rounding is to examine the digit to the right of the place you want to round to, in this case, the digit in the tens place. If that digit is 5 or greater, you round up; if it's less than 5, you round down.
In 56,980, the tens digit is 8, which is less than 5. Therefore, we don't need to round up. We simply drop the digits to the right of the hundreds place, which are the tens and ones digits. The hundreds digit (9) remains the same.
So, rounding 56,980 to the nearest hundreds gives us:
56,900
In this rounded number, the hundreds place (9) is unchanged, and the digits in the tens and ones places (8 and 0) have been dropped.
To understand it visually, think of 56,980 on a number line. When you round to the nearest hundreds, you're essentially finding the closest multiple of 100. In this case, 56,980 is closest to 57,000, which is why we round down to 56,900.
For more such questions on hundreds
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Answer:
57,000
Step-by-step explanation:
B. Evaluate each expression for x = 5. Based on your results, do you know whether the two expressions are equivalent? Explain.
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A)2x^2 + 3x - 12
2(2^2) + 3(2) - 12
2(4) + 6 - 12
8 + 6 - 12
14 - 12 = 2
2
3x(x-2) + 2
3(2) * (3-2) + 2
6 * 1 + 2
6 + 2 = 8
Nope, these are not equivalent.
Next one, x = 7
2x^2 + 3x - 12
2(7^2) + 3(7) - 12
2(49) + 21 - 12
98 + 21 - 12
119 - 12 = 107
3x(x-2) + 2
3(7) (7-2) + 2
21(5) + 2
105 + 2 = 107
Yes! When x = 7, these expressions are equal.
B) 2x^2 + 3x - 12
Apply the value for x.
2(5^2) + 3(5) - 12
2 (25) + 15 - 12
50 + 15 - 12
55 - 12 = 43
3x(x-2) + 2
3(5) * (5-2) + 2
15 * 3 + 2
45 + 2
47
When x = 5, these expressions are not equivalent.
3x-7y=6
7x+3y=72
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Let's Multiply The Top One By 3
Let's Multiply The Bottom One By 7
Now As You Can See 21y and -21y are equal, aand by that I mean that they will equal zero once added.
Now We Solve The System
1st. Add Straight Down Ex. 9x+49x, -21y+21y, 18+504
Add Straight Down
Now we Solve For X
Now We've Found X, We Need Y, and We Can Find It By Plugging In X To One of The ORIGINAL EQUATIONS.
One Of The Original Equations
1st. X=9, So Replace X with 9
Solve For Y
Now We Test It, X=9, Y=3
AND
SO: ANSWER