45 Cards
12 friends invited; 1/2 came 12 x 1/2=6
Let x stand for the number of cards each friend received
Armando kept 3
6x = 45-3
6x = 42
__ __
6 6
x = 7
Each friend received 7 cards
Answer:
The answer is 
Step-by-step explanation:
we know that
For 
the value of 
-----> see the graph
For 
the value of 
-----> see the graph
The average rate of change using the graph is equal to
In this problem we have
Substitute the values
80, 50 times 9.90 is 495 and 80 times 5.30 is 424, 424 + 495 = 919
You subtract -3 and -5 which is -2 then you add 6 and 9 which equals 15 so the answer is (-2,15)
Answer:
28%
Step-by-step explanation:
We know that 100 percent is total. Mateo first scored 68/100, then a retake got his score up to 94/100.
First, subtract the two numbers
94 - 68 = 26
Put 26 over 94 to make this 26/94
Divide to get 0.28 (simplified and rounded)
So the increase was 28%
