Mathematics
22.01.2023 21:31
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The sum of two numbers is 81. The larger number is twice the smaller number. Let
The sum of two numbers is 81. The larger number is twice the smaller number.
Let x be the larger number and y be the smaller number. What are the two numbers?
Express
your answer as an ordered pair in the format (x, y).
Show Answers
Express
your answer as an ordered pair in the format (x, y).
iiheartshay
4,8(55 marks)
Respuesta:
Los números son 18 y 6
Explicación paso a paso:
Si "x" es el más grande ; "y" el más pequeño
x + y = 2 ( x - y )
Además
x = 2y + 6
sustituimos
2y + 6 + y = 2 ( 2y + 6 - y )
2y + 6 + y = 4y + 12 - 2y
3y + 6 = 2y + 12
3y - 2y = 12 - 6
y = 6 ( número más pequeño )
Calculamos "x"
x = 2 ( 6 ) + 6
x = 12 + 6
x = 18 ( número más grande )
macinnoodlezz
4,4(69 marks)
D
The steepness (slope) is the same for both equations, but the lines cross the y axis at different points.
f(x) crosses the y axis at -4 while g(x) crosses the y axis at 2. If you counted on a graph, that is a difference of 6 units, so D is correct
The steepness (slope) is the same for both equations, but the lines cross the y axis at different points.
f(x) crosses the y axis at -4 while g(x) crosses the y axis at 2. If you counted on a graph, that is a difference of 6 units, so D is correct
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