3 years ago

sally and marta have the same number of postcards after sally sold 18 postcards. Marta had 4 times as many postcards as sally

Mathematics

1 answer:

shtirl [24]3 years ago

6 0

72 because 18 times 4 is 72.

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How do u solve radius

kotykmax [81]

Answer:

To calculate the radius of a circle by using the circumference, take the circumference of the circle and divide it by 2 times π.

The two formulas that are useful for finding the radius of a circle are C=2*pi*r and A=pi*r^2.

The diameter is 2 times larger than the radius

Step-by-step explanation:

Hope this helped

8 0

3 years ago

Mrs. Rodriguez wants to pay her restaurant bill which is $24.00. A 6% tax is added by the waitress. If Mrs. Rodriguez wants to l

Elis [28]

Answer:

30.53

Step-by-step explanation:

24 x 1.06 = 24.44 (6% tax added to 24)

24.44 x 1.20 = 30.53 (20% tip added on top)

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3 years ago

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You gave your little sister a good push on a swing and it made an arc of 12 ft. On the third swing it made an arc of 8.67 ft. Ho

jonny [76]

10.2 ft Ans.

We solve this using geometric series.

A1 = 12 ft
A2 = ?
A3 = 8.67ft
Now, for geomteric progression,

$\frac{A1}{A2} = \frac{A2}{A3} 

$

$\frac{12}{A2} = \frac{A2}{8.67}$

$A2 * A2 = (A2)^{2} = \sqrt{12 * 8.67 }$

A2 = 10.2 ft

6 0

3 years ago

If you are good at math please do this. IF U DONT DO IT AND PUT AN ANWSER SAYING YOU DONT KNOW IM REPORTING YOUR ACC

egoroff_w [7]

Answer:

(2, 1 )

Step-by-step explanation:

Assuming the centre of dilatation is the origin.

Then multiply each of the coordinates of B by 0.5 , that is

B(4, 2 ) → (4(0.5), 2(0.5)) → (2, 1 )

5 0

3 years ago

Devaughn's age is three times Sydney's age. The sum of their ages is 24 . What is Sydney's age?

mixer [17]

Sydney's age = x
Devaughn's age= 3x

So you get the equation:
x+3x=24
4x=24 (combine like terms)
x=6 (divide both sides by 4)

6 0

3 years ago

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