Question 2 Answer Solve
2 answers:
<u>Answer:</u>
- Option B is correct.
<u>Step-by-step explanation:</u>
<u>To subtract fractions, we must check if the denominators of both fractions are the same.</u>
- 2/5 - 1/7
- => 2 x 7/5 x 7 - 1 x 5/7 x 5
- => 14/35 - 5/35
<u>Now, let's subtract for the result.</u>
- => 9/35
Hence, <u>Option B is correct.</u>
Hoped this helped.
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Answer:
(x - 4)(x + 4)(x - 1)(x + 1)
Step-by-step explanation:
Given
- 17x² + 16
Use the substitution u = x², then
u² - 17u + 16
Consider the factors of the constant term (+ 16) which sum to give the coefficient of the u- term (- 17)
The factors are - 16 and - 1, then
u² - 17u + 16
= (u - 16)(u - 1) ← replace u by x²
= (x² - 16)(x² - 1) ← both factors are difference of squares
= (x - 4)(x + 4)(x - 1)(x + 1)
Answer:
Step-by-step explanation:
Given that: Training-session duration of female rowers with normal iron status is Normally distributed, with mean 69 minutes and standard deviation 18minutes.
Solution:
z score shows the relationship between sample means. The z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by the formula:
Given that μ = 69 minutes, σ = 18 minutes, n = 24
For x > 63 minutes:
From the distribution table, P(x > 63) = P(z > -1.63) = 1 - P(z < 1.63) = 1 - 0.0516 = 0.9484