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RideAnS [48]
3 years ago
8

Lucinda has a coin collection. she sold 12 coins to a friend and bought 7 new coins. she then had 39 coins. How many did she hav

e originally ​
Mathematics
1 answer:
erik [133]3 years ago
4 0

Answer: 44

Step-by-step explanation:The way to calculate the number of coins that she had originally is to look at the difference in coins that changed hands. She sold 12 coins, but only bought 7 new ones. 12-7=5. Lucinda now has 5 coins less than what she started out with. So, she has 39 now, and then add 5 and the answer is 44 coins.

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Question 2<br> Explain the difference between the graphs y = x3 and y = 3(x – 4)3 + 7.
Fiesta28 [93]

Answer:

The first graph , y=x³ is a cubic function graph and that of the second graph, y = 3(x – 4)3 + 7 is a linear graph.

Step-by-step explanation:

The graph of y=x³ is a cubic function graph where the x term has the highest power of x as 3. As attached in the first graph.

The second graph for y = 3(x – 4)3 + 7. is a linear graph that can be written as;

y=(3x-12)3 +7

y=9x-36 + 7

y=9x - 29

which is a linear graph with a slope of 9 and cuts the y-axis at -29 as shown in the second attached graph.

3 0
4 years ago
Find the other endpoint of the line segment with the given endpoint and midpoint.
Margaret [11]

Answer:

B

Step-by-step explanation:

because it is (5,15) and B is (5,15)

3 0
3 years ago
Can you answer these please? Show all work
Ganezh [65]

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.)

8 0
3 years ago
in all, how many counting numbers from 200 to 500 are divisible by all of the following 2, 3, 4,5 and 6?
Arte-miy333 [17]

Answer:

I think its  6 numbers  . See below

Step-by-step explanation:

The numbers must end in 0 because they must be divisible by 2 and 5

240 is one number it is the first number between 200 and 500 which is divisible by the 5 numbers.

The LCM of the 5 numbers is  60 so we can add  300, 360, 420 and 480 to the list.

5 0
3 years ago
Factor the expression. ( q2 − r2s) ( q4 + q2r2s + r4s2)
melomori [17]

(5q2 − r2s)(25q^4+5q^2r^2s+1r^4s^2)

3 0
3 years ago
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