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pinkygirlp1662
02.09.2021 •
Mathematics
In a golf tournament, Bill scored 4, Jodie scored -3, and David scored +1. Their team score is the
sum of their individual scores. What was their team score?
Record your answer on the grid below. Be sure to use the correct place value.
.
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Ответ:
y = x ^ 2 + 3x-5
y = 4x + 1
Equating the equations:
x ^ 2 + 3x-5 = 4x + 1
Rewriting:
x ^ 2-x-6 = 0
Factoring:
(x-3) (x + 2) = 0
Solutions:
x = 3 and x = -2
We evaluate the function for:
x = 3
y = (3) ^ 2 + 3 (3) -5 = 13
y = 4 (3) +1 = 13
x = -2
y = (- 2) ^ 2 + 3 (-2) -5 = -7
y = 4x + 1 = -7
The solutions are:
(-2, -7) and (3, 13)
Seth's solution is NOT correct