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Rainbow [258]
2 years ago
8

Round 1,287 to the nearest thousands place

Mathematics
2 answers:
Dmitry [639]2 years ago
5 0

Answer:

1,000

Step-by-step explanation:

refer to attached.

the number in the thousands place is the number 1.

How we round this number depends on the number immediately to the right of it (i.e the hundreds number)

Case 1: If the number in the hundreds place is less than 5, then we keep the number in the thousands place the same and replace all the digits to the right of the thousands digit by zeros

Case 2: If the number in the hundreds place is 5 or more, then increase the number in the thousands place  by 1 and replace all the digits to the right of the thousands digit by zeros

in our case, the hundreds digit is 2, which falls into case 1 above,

hence according to the procedure in case 1 above, we keep number 2 the same and replace everything to the right of 2 with zeros, giving us

1,000

alexdok [17]2 years ago
3 0

Answer:

1000

Step-by-step explanation:

If a number is higher than 5 round up. If its 4 or lower round down

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how many numbers did bill wrote if he wrote all the natural numbers between w and v not including w and v
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Answer:

v - w - 1

Step-by-step explanation:

Try an experiment with a small, specific set of numbers like:

4, 5, 6, 7, 8, 9, 10   w = 4 and v = 10.

There are 5 numbers in the list, not counting the first and last.  Is this related to the difference between v and w?  v - w = 6, one more than 5.

The number of natural numbers between  w  and  v, not including  w  and  v, is v - w - 1.

4 0
2 years ago
show that the sum of the x- and y- intercepts of any tangent line to the curve sqrt(x) sqrt(y) = sqrt(c) is equal to c.
expeople1 [14]
The answer is <span>√x + √y = √c </span>
<span>=> 1/(2√x) + 1/(2√y) dy/dx = 0 </span>
<span>=> dy/dx = - √y/√x </span>

<span>Let (x', y') be any point on the curve </span>
<span>=> equation of the tangent at that point is </span>
<span>y - y' = - (√y'/√x') (x - x') </span>

<span>x-intercept of this tangent is obtained by plugging y = 0 </span>
<span>=> 0 - y' = - (√y'/√x') (x - x') </span>
<span>=> x = √(x'y') + x' </span>

<span>y-intercept of the tangent is obtained by plugging x = 0 </span>
<span>=> y - y' = - (√y'/√x') (0 - x') </span>
<span>=> y = y' + √(x'y') </span>

<span>Sum of the x and y intercepts </span>
<span>= √(x'y') + x' + y' + √(x'y') </span>
<span>= (√x' + √y')^2 </span>
<span>= (√c)^2 (because (x', y') is on the curve => √x' + √y' = √c) </span>
<span>= c.  hope this helps :D</span>
5 0
3 years ago
What is wrong with the following equation: 4 + (10 / 5) = 6 - 2
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This equation says that 6 = 4, which is incorrect. However, if there was no - 2 on the right side of the equation the answer would be correct as 6 = 6
8 0
3 years ago
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