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adrian08022
23.12.2019 •
Mathematics
Joyce is trying to solve the equation y = x2 − 8x + 7 using the quadratic formula. she has made an error in one of the steps below. find the step where joyce went wrong.
step 1: x equals negative 8 plus or minus the square root of the quantity eight squared minus four times one times seven, end quantity, all over two times one.
step 2: x equals negative 8 plus or minus the square root of sixty-four minus twenty-eight all over two times one.
step 3: x equals negative 8 plus or minus the square root of thirty-six all over two times one.
step 4: x equals negative 8 plus or minus six all over two.
step 1
step 2
step 3
step 4
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Ответ:
Ответ:
Question:
Obtian the equation that can be used to solve for c
Sin50 = 3/c
Step-by-step explanation:
A triangle showing the information given has been attached below for clarity :
Using trigonometry :
AC = 3 = opposite side of angle 50°
AB = c = hypotenus
Using the sine relation of a right angled triangle :
Sin θ = opposite / hypotenus
θ = 50°
Sin 50° = 3 / c
Sin50 = 3/c