Answer:
Step-by-step explanation:
how many coins: d + q = 200
value of the money .10d + .25q = 44
(ten cents for each dime and 25 cents for each quarter)
Now to solve by elimination:
1)multiply the first row by -10 so that the dimes will cancel out.
-.10d + -.10 q = 20 (don't do anything to second row)
.10d + .25q = 44
2) now add those up.
the dimes cancel out.
.15 q = 64
that does not divide evenly so there is something wrong with this problem.
You pay: 22.50 and you save :7.50
Answer:
-8
Step-by-step explanation:
The rate of change is found by
f(x2) - f(x1)
-------------------
x2 -x1
We know that f(x2) = -26 when x2 =5
And f(x1) = -10 when x1 = 3
-26 - (-10)
---------------
5 - 3
-26+10
---------------
2
-16/2
-8
Answer:
Maggie is 13 years old.
Step-by-step explanation:
Maggie's age is: x
Maggie's brother's age is: 2x - 3
The sum of the ages = 36
x + 2x - 3 = 36
3x - 3 = 36
3x = 39
x = 13
Answer: Maggie is 13 years old.
