Answer:
the sum of the first 1000 positive integers is 500500
Step-by-step explanation:
Answer:
15%
Step-by-step explanation:
Ok so if you have to get rid of 25% of 16 than thats 12 because 4 quarters is 100 than you have to think how much does he have know which is 75% so three more types of birds adds 15% and 75 + 15= 90 and the increase was 15% so The answer is 15%
Answer:
See below
Step-by-step explanation:
(1) 2x + 3y = 15
(2) x - 3y = 3
First step:
Add Equations (1) and (2).
Reason:
The y terms have the same coefficient (3). If I add +3 and -3, the two terms will cancel each other (be eliminated).
How it helps:
If I eliminate the y terms, I have only one variable, the x variable, to deal with.
(1) 2x + 3y = 15
(2) x - 3y = 3
(3) 3x = 18
I can then easily solve Equation (3) for the value of x.
24 marbles in the first group
28 marbles in the second group
