2 years ago

Which of the following numbers are rational?

Mathematics

1 answer:

ololo11 [35]2 years ago

6 0

Answer:

402

Step-by-step explanation:

2(109) plus 2(92) equals 402

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Write an equation for a circle with a diameter that has endpoints at (7, –4) and (1, –10). Round to the nearest tenth if necessa

Black_prince [1.1K]

The standard form for the equation of a circle is :

(x−h)^2+(y−k)^2=r2 ----------- EQ(1)
where handk are the x and y coordinates of the center of the circle and r is the radius.
The center of the circle is the midpoint of the diameter.

So the midpoint of the diameter with endpoints at (7,-4)and(1,-10) is :

((7+(1))/2,(-4+(-10))/2)=(4,-7)

So the point (4,-7) is the center of the circle.

Now, use the distance formula to find the radius of the circle:

r^2=(7−(4))^2+(-4−(-7))^2=9+9=18

⇒r=√18

Subtituting h=4, k=-7 and r=√18 into EQ(1) gives :

(x-4)^2+(y+7)^2=18

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3 years ago

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Step-by-step explanation: 12 minus 4 equals 8

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Step-by-step explanation:

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2 years ago

Given the equations f(x) = x + 4 and d (x) = 2x + 5, find: f (1) + d (2)

Lina20 [59]

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3 years ago

2x+4(7−x) HELP PLEASE IM DEPERATEEEEE

goldenfox [79]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{ - 2x + 28}}}}}$

Step-by-step explanation:

$\sf{2x + 4(7 - x)}$

Distribute 4 through the parentheses

$\dashrightarrow{ \sf{2x + 28 - 4x}}$

Collect like terms

$\dashrightarrow{ \sf{2x - 4x + 28}}$

$\dashrightarrow{ \sf{ - 2x + 28}}$

Hope I helped!

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