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photoshop1234 [79]
3 years ago
14

Why is the simplified value of the expression below? -8*(-3)

Mathematics
1 answer:
kirill115 [55]3 years ago
8 0
When you multiply two numbers which have the same sign the answer is positive. Therefore multiply eight and three to get 24 and the answer is positive; therefor the answers 24.
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Courier charges for packages to a certain destination are 65 cents for the first 250 grams and 10 cents for each additional 100
SpyIntel [72]
Well, drop 65 cents (the first 250 grams) to get 90 remaining cents. These are 900 additional grams. So, the mass is 0.25+0.9=1.15 kg.
4 0
3 years ago
The​ half-life of radium is 1690 years. If 20 grams are present​ now, how much will be present in 250 ​years?
Aneli [31]

Answer:

  18.05 g

Step-by-step explanation:

The multiplier of the initial quantity is ...

  (1/2)^(t/1690)

so, for t=250, this becomes ...

  (1/2)^(250/1690) ≈ 0.902545

Then the quantity remaining of the initial 20 g is ...

  (20 g)(0.902545) ≈ 18.05 g

3 0
3 years ago
A lake has 10,000 fish.when a fishman scoops up his net ,he catches 500 fish. Suppose 150 of the 500 fish in his net are salmon.
Inessa [10]
You need x 20 to get to 10000, so do the same with 150 and get 3000, so it is 3000/10000
8 0
3 years ago
Read 2 more answers
Classify each number below as a rational number or an irrational number. −17.6 , 81 , 15π , (square root −29), 13/14
gregori [183]

Answer:

Rational Numbers

−17.6 (-176/10)

81

13/14

Rational Numbers

15π

square root −29

Step-by-step explanation:

Rational Numbers are those numbers which can be written as Ratio of two numbers.

Irrationational Numbers are those which cannot be written as ratio of two numbers. such as recurring numbers.

e.g 0.26262626.........

4 0
3 years ago
Julius is going to have a multi-course meal. The following table shows how many different dishes are
AnnyKZ [126]

Answer:

36

Step-by-step explanation:

If its the khan question 3x4x3

6 0
3 years ago
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