Answer = 16 birds
1. Write out your equations
X = birds
Y= cats
x + y = 19
2.50x + 7.50y = 62.50
2. Isolate one variable.
x + y = 19
x = 19 - y
3. Plug this in as the variable in the other equation. Then, solve.
2.5(19 - y) + 7.5y = 62.5
47.5 - 2.5y + 7.5y = 62.5
-2.5y + 7.5y = 15
5y = 15
y = 3 (cats)
4. Solve for the other variable.
We know there were 19 animals in total on Monday. Since there were 3 cats, there must be 16 birds.
5. Double check by plugging the numbers into the original equations.
16 + 3 = 19
19 = 19 (true)
2.5(16) + 7.5(3) = 62.5
40 + 22.5 = 62.5
62.5 = 62.5 (true)
16(9-3)
Subtract what is in the parentheses then multiply that answer by 16, 6•16=96
Find the mean median and mode of 15, 13, 9, 9, 7, 1, 11, 10, 13, 1, 13
forsale [732]
1. Median= 9
Mode= 13
2. Mean= <span>75.772727272727
Median= </span>76.5
Mode= 63
answer is A or C hope i helped
Answer:
10 times greater
In the first number, 3 represents 30,000, but in the second number 3 represents 3,000 so 30,000 is 10 times greater