Answer:
1) 31.1
2) 2.5
3) 1.6
4) 0.9
5) 5120
6) 1.7
7) 972
8) 0.02
Step-by-step explanation:
Answer:
The new price of the couch is $960
Step-by-step explanation:
The computation of the equations is illustrated below.
<h3>How to illustrate the equation?</h3>
a. x - y = 1 .... i
x + y = -9 ..... ii
Subtract the equations
-2y = 10
y = 10/-2 = -5
Since x - y = 1
x - (-5) = 1
x + 5 = 1
x = 1 - 5 = -4
b. 3x + 2y = -9
x - y = -13
Multiply equation i by 1
Multiply equation ii by 3
3x + 2y = -9
- 3x - 3y = -39
5y = 30
y = 6
Since x - y = 13
x - 6 = 13
x = 13 + 6 = 19
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Answer:
Step-by-step explanation:
The number of $5 notes is 10 and $50 notes is 6
Step-by-step explanation:
Let x be the number of $5 notes
and
y be the number of $50 notes
Then according to given statements
"The total number of notes used was 16."
x+y=16 Eqn 1
"A restaurant bill of $350 was paid using $5 notes and $50 notes."
5x+50y=350 Eqn 2
Putting x=10 in equation 1
So,
The number of $5 notes is 10 and $50 notes is 6
Keywords: Linear Equations, Variables
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