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2 years ago

Whatt are some inportant rules to dividing and multipling positives and negitives.

1 answer:

4 0

Positive × Positive = Positive
3 × 2 = 6
m × n = mn

Positive × Negative = Negative
8 × -4 = -32
m × -n = -mn

Negative × Negative = Positive
-5 × -4 = 20
-m × -n = mn
(-x) × (-x) = x²

The same rules apply for division as multiplication.

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Help me with the question in the pic please and thank u!

Zepler [3.9K]

Answer:

1.98

Step-by-step explanation:

In this problem, we are:

Given: ∠D = 26°, Hypotenuse (DF) = 4.5

To solve: EF

Now through the given, we are to focus on point D to solve for EF.

We need to find the relationship of point D to DF and EF.

The relationship here is sine.

Reason: $\frac{opposite}{hypotenuse}$

Through point D, DF is the hypotenuse and EF is the opposite side.

So let's solve this simply through algebra,

sin = $\frac{opposite}{hypotenuse}$

sin(26°) = $\frac{EF}{4.5}$

0.44 = $\frac{EF}{4.5}$

0.44 × 4.5 = EF

1.98 = EF

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3 years ago

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Anon25 [30]

Answer:

$y=\cfrac{1}{2}\;x-4$

x | y

10 1 = 1/2 (10) -4=5-5= 1

-2 -5 = 1/2(-2)-4=-1-4= -5

4 -2 = 1/2(4)-4=2-4= -2

-8 -8 = 1/2(-8)-4=-4-4= -8

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1 year ago

What are the equivalent expressions for aº and a " ? Why do<br> these rules work?

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Hopefully this helps and makes sense to you if you don’t understand ask another question to me or anyone hehe

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