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den301095 [7]
3 years ago
5

An orchard has 30 rows of apple trees. There are 3 trees in each row. How many apple trees are in the orchard?

Mathematics
2 answers:
inn [45]3 years ago
3 0
30 rows times 3 trees per row is 90 trees. 
ivanzaharov [21]3 years ago
3 0
90, there would be 90 apple trees. You just have to multiply 30x3.
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irina [24]

Answer:

(3,2)

Step-by-step explanation:

The method of variable substitution is a way of solving a system of equations. It involves solving one equation for a variable and then substituting in the expression that represents the value of the solved variable into the other equation. After doing so, one can solve for the unknown variable and then backsolve for the other variable.

y=-2x+8\\y=x-1

In this system, the second equation is already solved for (y), thus one can substitute that expression into the other equation in the system.

x-1 = -2x + 8

Now solve using inverse operations,

x -1 = -2x + 8\\+2x\\\\3x - 1 = 8\\+1\\\\3x =9\\/3\\\\x = 3

Backsolve to find the value of (y), substitute in the value of (x), and solve for the value of (y).

y=x - 1\\

Substitute,

y=(3)-1

Solve,

y=2

Thus, the answer to this system of equations is the following, (3,2).

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