There is one solution in the system of equation
<h3>How to determine the number of solutions?</h3>
The system of equations is given as:
8x=12y-9 and 27y+18x=21
Divide 8x=12y-9 by 8
x = 1/8(12y-9)
Substitute x=1/8(12y-9) in 27y+18x=21
27y + 18 * 1/8(12y-9) =21
Expand
27y + 27y - 20.25 =21
Evaluate the like terms
54y = 41.25
Divide by 54
y = 0.7639
Hence, there is one solution in the system of equation
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Answer:
what is in the thousandths place
Step-by-step explanation:
count
The total profit TechWiz made from MP3 and DVD players last week is
Explanation:
Let x represent the number of MP3 players TechWiz sold last week.
Let y represent the number of DVD players TechWiz sold last week.
The profit made by TechWiz on each MP3 player = $35
The profit made by TechWiz on each DVD player = $18
Total number of MP3 and DVD players TechWiz sold last week is 121
Number of DVD players TechWiz sold last week
The total profit TechWiz made from MP3 and DVD players last week is given by
Substituting in , we get,
Simplifying, we get,
Thus, the total profit TechWiz made from MP3 and DVD players last week is
Step-by-step explanation:
I assume the question is asking for Eric's grandfather age now.
Let Eric's age now be x. Then Eric's grandfather age now is (x + 55).
In 7 years, Eric's age will be (x + 7) and Eric's grandfather age will be (x + 62).
We know that (x + 62) = 6(x + 7).
x + 62 = 6x + 42
5x = 62 - 42 = 20
x = 4.
Answering the question: Eric's grandfather age now is (4 + 55) = 59 years old.