Keywords:
<em>Pair of numbers, negatives, law of signs, multiply
</em>
For this case we must say that it is obtained by multiplying any even number of negative numbers, that is, if a positive or negative number is obtained.
We must bear in mind that the Law of Signs states that:
For example:
Let -a, -b, -c, -d negative numbers, we have:
- A pair:
- Two pairs:
This is true for the multiplication of any pair of negative numbers.
So, the answer is: You get a positive number
Answer:
A positive number is obtained
Answer:
s =6
Step-by-step explanation:
40 8
--------- = ---------
30 s
Using cross products
40*s = 30*8
40s = 240
Divide each side by 40
40s/40 = 240/40
s = 6
You can focus on the two sub-triangles ABC and ACD
We know that they are both right triangles, because we're given that AC and BD are perpendicular.
The sides AB and AD are the hypothenuses of these triangles, so we know their length through the pythagorean theorem:
But since we're given 
, the expressions for AD and AB are actually the same expression. This proves that AD=AB, and thus that the triangle is isosceles.
Answer:
29 miles
Step-by-step explanation:
a²+b²=c²
21²+20²=841
√841=29
Answer:
13.87
Step-by-step explanation:
Three friends went out to eat dinner the bill came to 35.60. This means that the total bill for the dinner was 35.60.
The original bill was 35.60. If they shared the bill equally, the amount that each of them would pay would be
Total bill / number of friends
It becomes 35.60/3 = 11.87
The three friends also decided to leave a 6.00 tip and it was sent equally. This means that each friend would pay a tip of
6/3 = 2. ( total amount of tip paid divided by the number of friends)
Therefore, the total amount that each has to pay = amount each paid for the bill + amount that each paid for the tip
= 11.87 + 2 = 13.87
