Answer:
- 12k² + kl
Step-by-step explanation:
Given
7kl - 3k(4k + 2l) ← distribute parenthesis by - 3
= 7kl - 12k² - 6kl ← collect like terms
= - 12k² + kl
Answer:
Step-by-step explanation:
5 3/7= 38/7 (move the wholes into the fraction)
2 1/5=11/5
38/7- 11/5 we need the common denominator=35
190/35 -77/35= 113/35
=3 8/35
<h3><u>Question:</u></h3>
The present ages of Ram and Rehman are in the ratio 8:9. After 5 years, the ratio of their ages will be 9:10. Find their present ages.
<h3><u>Statement:</u></h3>
The present ages of Ram and Rehman are in the ratio 8:9. After 5 years, the ratio of their ages will be 9:10.
<h3><u>Solution:</u></h3>
- Let the present age of Ram and Rehman be 8x years and 9x years respectively.
- After 5 years, their ages will be 9x years and 10 years respectively.
- Therefore, by the problem
- So, the present age of Ram = 8x years = (8×5) years = 40 years
- The present age of Rehman = 9x years = (9×5) years = 45 years
<h3><u>Answer:</u></h3>
The present ages of Ram and Rehman are 40 years and 45 years respectively.
For 3a, we see that it states that the submarine is 800 feet below sea level. Since it is below sea level, it is negative (as sea level is 0) and therefore -800, making ii correct.
For 3b, since the elevation is -150 feet, and negative means below sea level, the reef is 150 feet below sea level, making i correct.
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