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Mathematics

2 answers:

ch4aika [34]3 years ago

4 0

Answer:

None of the above

Step-by-step explanation:

=4+2y+7

x+8=(7x)+

(2y)+(4+8)=7x+2y+12

snow_tiger [21]3 years ago

3 0

None of these really do. The associative property is about regrouping things being added, such as
(3+5)+7 = 3+(5+7)

Someone could I guess argue the “4+2y+7x+8” used it, by dropping the parentheses and thereby changing the grouping to just be the standard left-to-right that the order of operations dictates. But that’s a pretty lame answer if that’s what the person is going for.

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Ne4ueva [31]

The answer is - 1.5. subtract -2.5 by -1.5

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3 years ago

What are the coordinates of the image of point L(4, 2) after a reflection over the line y = –1?

andrey2020 [161]

Answer:

L'(4, -4)

Step-by-step explanation:

When you're given a midpoint, you can find the point equidistant on the other side of the midpoint by subtracting the relevant coordinate from double that of the midpoint.

Here, the line of reflection is the horizontal line y=-1, so you know only the y-coordinate will change. The reflected point will be ...

(x, y) ⇒ (x, -2-y)

so the point of interest is ...

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4 years ago

Greenland, the largest island in the world, is 21 times larger than Iceland. The combined area of Greenland and Iceland is 880,0

Vlad1618 [11]

Greenland is x
Iceland is g

g + x = 880,000
x = 21g

Solve both equations for x (Greenland)
x = 880,000 - g
x = 21g

Because of the transitive property, which states that for any real numbers a, b, and c: If a = b and b = c, then a = c, you can set the two things that equal x equal to each other.
21g = 880,000 - g

Then you simplify.
21g = 880,000 - g
21g + g = 880,000 -g +g
22g = 880,000

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3 years ago

Find the value of x. Round to the nearest tenth.

emmasim [6.3K]

Answer:

x = 8.5

Step-by-step explanation:

$\frac{sin28^{o} }{x} =\frac{sin83^{o} }{18}$