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3 years ago

Explain how using basic facts can help you find 10 X 20 X 30 X 40 mentally?

2 answers:

4 0

Take the left side of each number first. Do 1 x 2 x 3 x 4. That equals 24. Easy. Now, count the 0's in the equation which are 4 of them. Add the four zeros and to the 24 and that's your answer. 240,000

laiz [17]3 years ago

4 0

First you o 10*20 which is 200. Then multiply it by 30 that equals to 6000. And then multiply it by 40 that is 240,000.

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3 years ago

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4 years ago

Which is equivalent to 3x/x+5 - x-5/x

oee [108]

Answer:

B. $\frac{2x^2+25}{x(x+5)}$

Step-by-step explanation:

$x(\frac{3x}{x+5})-(x+5)(\frac{x-5}{x})$

= $\frac{3x^2}{x(x+5)} - \frac{(x-5)(x+5)}{x(x+5)} = \frac{3x^2-(x-5)(x+5)}{x(x+5)}$

= $\frac{3x^2-(x^2-25)}{x(x+5)}$

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7 0

3 years ago

Read 2 more answers

What is the slope of the line for this table?

ZanzabumX [31]

Pick 2 sets of points....any 2 sets
(25,-8),(30,-10)
now we use the slope formula : (y2 - y1) / (x2 - x1)
now we label our points...
(25,-8).....x1 = 25 and y1 = -8
(30,-10)...x2 = 30 and y2 = -10
now we sub....play close attention to ur signs
slope = (-10 - (-8) / (30 - 25) = (-10 + 8) / 5 = -2/5 <== ur slope

3 0

3 years ago