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3 years ago

What is the difference between five times a number and twice that number !??? Help asap!!

Mathematics

2 answers:

ladessa [460]3 years ago

7 0

When you times a number by two you times a number by two and you times a number by five

polet [3.4K]3 years ago

7 0

Answer:

5x-2x=3x

Step-by-step explanation:

You don't know what that number is. That's why you are using a variable. Difference is abviously subraction. Therefore, 5x-2x is equal to 3x

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7- a. What is the radius of the circle with center (3,10) that passes through (12,12)?

loris [4]

Answer: a. Radius of circle = $\sqrt{85}$

b. The equation of this circle : $(x-3)^2+(y-10)^2=85$

Step-by-step explanation:

Given : Center of the circle = (3,10)

Circle is passing through (12,12).

a. To find the radius we apply distance formula (∵ Radius is the distance from center to any point ion the circle.)

Radius of circle = $\sqrt{(12-3)^2+(12-10)^2}$

Radius of circle = $\sqrt{(9)^2+(2)^2}=\sqrt{81+4}=\sqrt{85}$

i.e. Radius of circle = $\sqrt{85}$

b. Equation of a circle = $(x-h)^2+(y-k)^2=r^2$ , where (h,k)=Center and r=radius of the circle.

Put the values of (h,k)= (3,10) and r= $\sqrt{85}$ , we get

$(x-3)^2+(y-10)^2=(\sqrt{85})^2$

$(x-3)^2+(y-10)^2=85$

∴ The equation of this circle : $(x-3)^2+(y-10)^2=85$

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zvonat [6]

Answer:

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Step-by-step explanation:

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Degger [83]

Answer:

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4 years ago

Solve by finding the square root 2x^2=32

Cerrena [4.2K]

2x^2=32 so divide by 2 to make x^2=16 and the square root so x=4

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3 years ago

Read 2 more answers

Solve for x. x3 =−125

mafiozo [28]

Answer:

x = -5 or x = 5 (-1)^(1/3) or x = -5 (-1)^(2/3)

Step-by-step explanation:

Solve for x:

x^3 = -125

Taking cube roots gives 5 (-1)^(1/3) times the third roots of unity:

Answer: x = -5 or x = 5 (-1)^(1/3) or x = -5 (-1)^(2/3)

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4 years ago