Answer:
7,001,048
Step-by-step explanation:
Answer:
x = 1, y = 2
Step-by-step explanation:
7x + 2y = 11 -----Equation 1
Equation 1 × 7:
49x + 14y = 77 -----Equation 2
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4x - 7y = -10 -----Equation 3
Equation 3 × 2:
8x - 14y = -20 -----Equation 4
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Equations 3 + 4:
49x + 14y + 8x - 14y = 77-20
49x + 8x = 77-20
57x = 57
x = 57 ÷ 57
x = 1
Substitute x = 1 into Equation 1.
7x + 2y = 11
7(1) + 2y = 11
7 + 2y = 11
2y = 11-7
2y = 4
y = 4 ÷ 2
y = 2
Answer:
x < 45
Step-by-step explanation:
<u>Answer:</u>
Distance = 3r
<u>Step-by-step explanation:</u>
We are to write an algebraic expression and then simplify it for the given situation:
<em>The distance traveled by a train in three hours with a constant speed of r miles per hour.</em>
We know the formula of distance linking the speed and the time.
Distance = speed × time
Substituting the given values to get:
Distance = r × 3
Distance = 3r
