Which expression is equivalent to (r-⁷)⁶?

Mathematics

1 answer:

lara [203]3 years ago

3 0

Answer: the expression that is equivalent to that is 42

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Use the elimination method to solve the system of equations. X+y=-3 X-y=13

Olin [163]

So I will choose to cancel the y first because that is easiest. To do this, add both equations together.
x+y = -3
+
x - y = 13
This will give us:
2x = 10
therefore, x = 5
Now, we can plug this into the first equation to find y
5+y = -3
y = -3 - 5
y = -8

Answer:
x = 5
y = -8

Hope this helped!! :D

3 0

3 years ago

Read 2 more answers

Can someone help me please??

worty [1.4K]

Answer:

The little brother should place the mirror at 36 ft from the base of the tree to properly see its top

Step-by-step explanation:

Similar Triangles

Two triangles are defined as similar if their corresponding angles are congruent and the corresponding sides are in proportion. The triangle formed by the kid and the ground and the triangle formed by the tree and the ground are similar since the angle of reflection over the mirror is the same, i.e. the light travels in a straight line. This means that we can set this proportion

$\displaystyle \frac{x}{72}=\frac{2}{4}$