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3 years ago

110,568÷220−568÷220 Calculate efficiently in your head.

Mathematics

2 answers:

julsineya [31]3 years ago

8 0

Answer:

500?

Step-by-step explanation:

AveGali [126]3 years ago

3 0

Answer:

500

Step-by-step explanation:

Mental calculation often makes use of factoring and cancelling of factors. To the greatest possible extent, multiplying or dividing by powers of 2, 5 and 10 are also used.

$\dfrac{110568}{220}-\dfrac{568}{220}=\dfrac{110568-568}{220}=\dfrac{110000}{220}\\\\=\dfrac{110}{220}\cdot1000=\dfrac{1}{2}\cdot1000=\boxed{500}$

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X+2y=-2 3x+4y=6 ????

Korvikt [17]

Answer:

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3 years ago

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What is the slope of the line that passes through the points (-3, 5) and (1, 7)?

Stells [14]

Answer: The slope of the line is $\frac{1}{2}$

Step-by-step explanation:

The slope of a line can be calculated with the following formula:

$m=\frac{y_2-y_1}{x_2-x_1}$

Then, given the points $(-3, 5)$ and $(1, 7)$ , you can identify that:

$y_2=5\\y_1=7\\\\x_2=-3\\x_1=1$

Knowing these values you can substitute them into the formula for calculate the slope:

$m=\frac{5-7}{-3-1}$

Finally, evaluating, you get that the slope of that line is:

$m=\frac{-2}{-4}\\\\m=\frac{1}{2}$

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3 years ago

43. Find the image of the point (1,2) when reflected<br>by the line x=-1

dolphi86 [110]

Answer:

-3, 2

Step-by-step explanation:

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3 years ago

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Lana71 [14]

Answer:

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Step-by-step explanation:

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3 years ago

I need help solving this pls

Oksana_A [137]

Answer:

Adding them together. x = 3/2, y = 8

Step-by-step explanation:

Adding because we want to get rid of a variable. If we add, 2x + 6x = 8x, 1/2 * y + (-1/2 * y) = 0, and 7 + 5 = 12. Adding gets rid of the y variable.

By adding we get that 8x = 12 which gives us x = 12/8 = 3/2

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3 years ago