What do you need to know in order to do a rotation? Complete a rotation of your choice and identify the rule for this

Mathematics

1 answer:

Maurinko [17]3 years ago

6 0

You are suppose to use a ruler to rotate the thing you need to rotate

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Solve the system using the substituion method -4x+y=8 x-3y=9

lions [1.4K]

Hi there!

x - 3y = 9
x = 9 + 3y

-4x + y = 8
-4(9+3y) + y = 8
-36 - 12y + y = 8
-36 - 11y = 8
-11y = 44
-y = 4
y = -4

x - 3y = 9
x - 3(-4) = 9
x + 12 = 9
x = 21

So, your answers are y = -4 and x = 21.

Hope this helps!

3 0

3 years ago

What is the mean? Round to one decimal place. 1,6,2,7,9

Viefleur [7K]

Answer:

Step-by-step explanation:

The mean represents an average of all the numbers, so we have $\frac{sum-of-all-numbers}{total-amount-of-numbers}$ . Although that may seem confusing, it's actually pretty easy.