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Vilka [71]
3 years ago
5

Write an equivalent expression without parentheses and combine terms if possible 7(y + 7) - 11y

Mathematics
2 answers:
Vesnalui [34]3 years ago
3 0

Answer:

  -4y +49

Step-by-step explanation:

Use the distributive property to eliminate parentheses. Then combine like terms.

  7(y +7) -11y

  = 7y +7·7 -11y

  = y(7 -11) +49

  = -4y +49

AURORKA [14]3 years ago
3 0
7(y+7)-11y
7y+49-11y

18y+49








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

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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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3 years ago
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kondaur [170]
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Step-by-step explanation:

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cupoosta [38]

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Step-by-step explanation:

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