Use the elimination method.
(-5x + y = 26)7
2x - 7y = 16
-35x + 7y = 182
2x - 7y = 16
-33x = 198
x = -6
Substitiute -6 for x in one of the equations.
2x -7y = 16
2(-6) - 7y = 16
-12 - 7y =16
-7y = 28
y = -4
The ordered pair would be (-6,-4)
Answer:
2 science fiction and 5 mystery
Step-by-step explanation:
First, we will set up a system of equations.
x (science fiction) y (mystery)
x + y = 7 This is the total books bought.
7x + 9y = 59 The amount of each set to the total cost.
Now we solve.
(-7)x + y = 7 equals
-7x - 7y = -49
added to
7x + 9y = 59
this equals
2y = 10
y = 5
Now we know one. We can plug it in to find the other value.
x + 5 = 7
x = 2
Answer:
a
Step-by-step explanation:
sub to yfbg jay
Answer:
Step-by-step explanation:
Represent the table with T, couch with C an umbrella with U
We have the following:
Required
Determine the cost of a table
Make T first equation
In the third equation, we have that:
By substituting 1275 for 2C + U
becomes
<em>Hence, a table costs $600</em>
21/16 which simplifies to 1 and 5/16
You get this by making 1 1/2 a mixed number (3/2). To get 3/2 you do: bottom times the side plus the top---2x1=2+1=3. So 3/2
Then you multiply across:
7x3=21
8x2=16
So 21/16 is your answer