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Kryger [21]
3 years ago
10

Iv)

Mathematics
1 answer:
vichka [17]3 years ago
3 0

Answer:

Her daughters age: 1/2x

Step-by-step explanation:

Let's say Rani's present age is x. Her age is twice the age of her daughter.

So if Rani's age is 20, her daughters age would be 10, because Rani is twice the age of 10; so 10 times 2 would be 20.

1/2(20)=daughter's age

so if you substitute x into 20 because we don't actually know Rani's age, it would be 1/2(x)=daughter's age.

hope this helped :-) <3

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The equation of a circle is (x + 3)2 + (y – 5)2 = 81. Determine the coordinates of the center of the circle and the length of th
Nataly_w [17]

Answer:

The center of the circle is (-3 , 5) and the length of the radius is 9 units

Step-by-step explanation:

* Lets revise the standard form of the equation of the circle

- The center-radius form of the circle equation is in the format

 (x – h)² + (y – k)² = r², where the center is the point (h, k) and

 the radius is r.

- This form of the equation is helpful, because you can easily find

  the center and the radius.

* Now lets solve the problem

- The equation is (x + 3)² + (y - 5)² = 81

- By comparing the two equations

∵  (x – h)² + (y – k)² = r² and  (x + 3)² + (y - 5)² = 81

# x - h = x + 3

∴ -h = 3 ⇒ divide both sides by -1

∴ h = -3

# y - k = y - 5

∴ k = 5

# h and k are the coordinates of the center of the circle

∴ The center of the circle is (-3 , 5)

# r² = 81 ⇒ take √ for both sides

∴ r = 9

∴ The length of the radius = 9 units

* The center of the circle is (-3 , 5) and the length of the radius is 9 units

3 0
3 years ago
Ava earns $ 3 for every cup of lemonade she sells How many cups of lemonade does Ava need to sell in all to earn $ 24?
STatiana [176]

Answer:

Ava needs to sell 8 cups of lemonade to earn $24.

Step-by-step explanation:

This is actually just a simple multiplication question. How many times do we need to multiply 3 to get 24? 3 x 8 is 24, and therefore we can conclude Ava needs to sell 8 cups of lemonade to earn $24.

3 0
3 years ago
Need help on this ASAP!!
dlinn [17]
D=3G divided by h hope this helped!
5 0
3 years ago
If you are smart put this emojiif u not smart put this emoji ok thanks
PtichkaEL [24]
Yesssss that is right
3 0
3 years ago
Read 2 more answers
It's -25 in Alaska and 75 in Florida. How much hotter is it in Florida than in Alaska?
emmasim [6.3K]
Just subtract to find the difference.

75 - (-25) = 75 + 25 = 100.

It is 100 degrees hotter in florida than alaska.
3 0
3 years ago
Read 2 more answers
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