B(boxes) < 3 1/2 so this means that any box less than 3 1/2 can fit through the doorway
Let x = the first number
y = the second number
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First: set up the equations.
Four times a first number: 4x
Decreased by a second number: - y
Is 4: = 4
4x - y = 4.
The first number increased by: x +
three times the second number: 3y
is -25: = -25
x + 3y = -25.
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You can make your system of equations now.
4x - y = 4
x + 3y = -25
I would use substitution to solve these.
To do substitution, isolate a variable first, in one of the equations. I would probably isolate x in the second equation.
x + 3y = -25
x = -25 - 3y
Now, you can substitute -25 - 3y into 4x - y = 4, as x.
4x - y = 4
4(-25 - 3y) - y = 4
Now just solve for y.
-100 - 12y - y = 4
-13y = 104
y = -8
Now, you can put -8 as y into one of the original equations, I'll just use 4x - y = 4.
4x - y = 4
4x - (-8) = 4
4x + 8 = 4
4x = -4
x = -1
So the first number is -1, and the second -2.
Answer:
B. 
Step-by-step explanation:
5÷7 is also 
--that divided sign is what the fractional bar represents in a fraction.
now multiply 
both are the same result, so your answer is Choice B.
Answer:
15-9 will be greater
Step-by-step explanation:
Caroline wants to compare the expressions 15-9 and 9 (-15)
For us to know the result that is greater, we will have to check if the first value is less than or greater than the other. For example
If for a-b
a-b is greater if a>b
a-b is lesser if a<b
Given 15 - 9
Since 15 > 9, this means that 15-9 will be greater compare to 9-15
