Please answer question below asap!!
1 answer:
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9514 1404 393
Answer:
x^2 -4x +2 = 0
Step-by-step explanation:
The other root is the conjugate of the given one, so is 2-√2. The quadratic equation in factored form is then ...
(x -2-√2)(x -2+√2) = 0
Expanding this, we get ...
(x -2)^2 -(√2)^2 = 0
x^2 -4x +4 -2 = 0
x^2 -4x +2 = 0 . . . . the equation you're looking for
Answers:
- 7: 20 miles
- 8: 28 miles
- 9: 1 error
- 10: Their speed is 50
- 11: 365 words in 5 mins
Step-by-step explanation:
- #7 and #8
Our equation is: With f meaning "fare" (price) and m meaning "miles".
Question 7 - Juan's fare for his ride costs $6.05. We must solve for .
Step 1. Substitute - <em>Substitute the fare for in the equation.</em>
Step 2. Simplify/Solve - Solve for .
<em>- Distribute</em>
<em>- Subtract 0.2 from 2.25</em>
<em>- Subtract -2.05 from 6.05</em>
<em>- Divide both sides by 0.2</em>
<u>And you have your answer of 20 miles.</u>
Question 8 - Same equation, different fare.
Step 1. Substitute
Step 2. Solve
And like so, we have
- Questions 9 - 11
<em>The equation given is . S = typing speed, w = words per 5 mins, and e= errors.</em>
Question 9 -
<em>We are given this information: S = 55, W = 285. We are solving for e</em>.
Substitute -
Solve -
So they would make 1 error.
Question 10 -
<em>Information given: 300 = w, 5=e. We are solving for S</em>
Substitute -
Solve -
Their speed is 50.
Question 11 -
<em>Information given: S = 65, e = 4. We are solving for w.</em>
Substitute -
Solve -
So w = 365.
- Hoped this helped!~