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3 years ago

Jane is 3 years older than mary, and mary is twice as old as kay. if kay is x years old, how old is jane?

Mathematics

2 answers:

lapo4ka [179]3 years ago

7 0

Answer:

2x +3 years old is Jane

Step-by-step explanation:

As per the statement:

If Kay is x years old.

Mary is twice as old as Kay.

then;

Mary = 2x years old

It is also given that Jane is 3 years older than mary

⇒ Jane = 2x + 3

Therefore, 2x +3 years old is Jane

krek1111 [17]3 years ago

6 0

The answer is y = 2x + 3.

x - Kay's age
y - Jane's age
m - Mary's age

Jane is 3 years older than Mary: y = m + 3
Mary is twice as old as Kay: m = 2x

y = m + 3
m = 2x

Substitute m in the first equation:
y = 2x + 3

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Amanda's school is due west of her house and due south of her friend Shereen's house. The distance between the school and Sheree

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The Amanda's house is 6.7 km far from her school.

Step-by-step explanation:

From the given information,

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The straight-line distance between Amanda's house and Shereen's house forms the hypotenuse.

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The distance between the school and Shereen's house is 2 kilometers.

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Now, the distance between the Amanda's house and her school is the base of the triangle.

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3 years ago

5) A theatre can be rented for different hours. The cost is $100 for deposit and $200 per hour. Write a function rule to find th

IgorLugansk [536]

Answer:

Step-by-step explanation:

Since the cost is $100 for deposit and $200 per hour, the function rule to find the total cost of renting the theatre for 'n' hours will be:

= 100 + 200(n)

= 100 + 200n

The total cost if you rented the theatre for 4 hours will be gotten by replacing n with 4. This will be:

= 100 + 200n

= 100 + 200(4)

= 100 + 800

= $900

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3 years ago