3/8 + 1/8 - 2/7 + 1/4=

Mathematics

1 answer:

AlexFokin [52]3 years ago

4 0

Answer:

13/28

Step-by-step explanation:

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Marta is making two different charms for necklace one charm has a 1 cm diameter and a 3.14 cm circumference of a similar charm h

EastWind [94]

From what I can pick up from your problem statement, you want to know "a similar charm has a diameter of 4 cm what is the circumference." Please, would you use proper punctuation in your writing, for greater clarity:

"A similar charm has a diameter of 4 cm. What is the circumference?"

The formula for the circumference of a circle, when the diameter is known, is

C= $\pi$ d or C=pi*d

In this case, with diamter 4 cm, the circumference, C, is 4pi cm.

3 0

3 years ago

A golf ball, thrown upwards, rises at a speed of v metres per second.

miss Akunina [59]

Answer:

162 metres

Step-by-step explanation:

Since h is proportional to the square of v, we know that their ratio must be constant, so $v_1^2/h_1 = v_2^2/h_2$ where v1 and v2 are velocities and h1 and h2 are their respective heights.

Since we are given that v = 10 and h = 8, we can set v1 = 10 and h1 = 8 and since we are trying to find the height for v = 45, we can set v2 = 45. Inputting these values into the equation and solving, we get

10^2/8 = 45^2/h2

h2 = 45^2/(10^2/8) = 162 metres

I hope this helps!

4 0

2 years ago

Let f(x)= 7x-13.find f powered to the negative 1 power (x)

Reil [10]

Let f(x) be y so you have
y=7x-13
Reverse the signs of x and y so you have
x=7y-13
And then find the value of y
x+13=7y
(x+13)/7=y
And change y to f(x)-1

6 0

3 years ago

1. x^2 + 6x + 8 = 0 2. x^2 + 10x + 21 + 0 3. X^2 + 9x + 18 = 0

WARRIOR [948]

Answer:

545256

Step-by-step explanation:

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2 years ago

One side of this regular hexagon has been extended to form an exterior angle.

dedylja [7]

Check the picture below.