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kumpel [21]
3 years ago
6

Can you answer these please? Show all work

Mathematics
1 answer:
Ganezh [65]3 years ago
8 0

Answer:

i)  Sally' s grocery bill = c - \frac{5}{100}c = 0.95c

   Therefore the correct option is B.)

ii)   Therefore the expression which represents the expected population  

    next year is given by :

    = p + \dfrac{7.5}{100} p   =   1.075p

Therefore the correct option is B.)

Step-by-step explanation:

Sally has a discount card that reduces the price of her grocery bill in a certain grocery store by 5%.

Let c represent the cost of Sally's groceries.

therefore the expression which represents Sally's grocery bill is given by :

Sally' s grocery bill = c - \frac{5}{100}c = 0.95c

Therefore the correct option is B.)

The population of a city is expected to increase by 7.5% next year If p represents the current population, which expression represents the expected population next year?

Let p = current population of a city.

Therefore the expression which represents the expected population next year is given by :

  = p + \dfrac{7.5}{100} p = 1.075p

Therefore the correct option is B.)

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d on edg

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Step-by-step explanation:

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Find<br>Sin 2 (30degrees)<br>​
Vinvika [58]

Answer:

<em>Sin 2 (30)°=  </em>\frac{\sqrt{3} }{2}

Step-by-step explanation:

<u><em>Explanation:-</em></u>

<em>Given that   Sin 2 (30)°</em>

<em>we know that the formula  sin2θ = 2sinθ cosθ</em>

<em>    Given that θ = 30</em><em>° </em>

<em>    Now  </em>

<em>          sin2(30)° = 2sin30° cos30°</em>

<em>                                              </em>= 2 ( \frac{1}{2} X \frac{\sqrt{3} }{2} )<em> </em>

<em>        After cancellation, we get</em>

<em>                            Sin 2 (30)° = </em>\frac{\sqrt{3} }{2}

<u><em>Final answer:-</em></u>

<em>           Sin 2 (30)° = </em>\frac{\sqrt{3} }{2}<em>    </em>

<em></em>

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