A survey was done that asked students to indicate whether or not they have ever prepared a meal for their family.
2 answers:
Answer:
The ratio is 17 : 16
Step-by-step explanation:
From the survey done it was revealed that number of students who have prepared the meal for their family
students with age 13-15 + students with age 16-18
= 23 + 147 = 170
Similarly number of students who have not prepared the meal for their family = 112 + 48 = 160.
Now the ratio of the students who have prepared the meal for their family and the students who have not
= ⇒ 17 : 16
The ratio is 17 : 16
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Answer:
second option
Step-by-step explanation:
Given
+ 6x² + 5 = 0
let u = x², then
u² + 6u + 5 = 0 ← in standard form
(u + 1)(u + 5) = 0 ← in factored form
Equate each factor to zero and solve for u
u + 1 = 0 ⇒ u = - 1
u + 5 = 0 ⇒ u = - 5
Change u back into terms of x, that is
x² = - 1 ( take the square root of both sides )
x = ± = ± i ( noting that
= i ), and
x² = - 5 ( take the square root of both sides )
x = ± = ±
= ±
×
= ± i
Solutions are x = ± i and x = ± i