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2 years ago

What is 1 and 3\10 +1\4

Mathematics

2 answers:

Marysya12 [62]2 years ago

7 0

Answer:

1.55

Step-by-step explanation:

1.3+0.25=1.55

Svet_ta [14]2 years ago

5 0

31/20 or 1 and 11/20

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1760 yards in a mile. What does one cubic mile represent

iragen [17]

One cubic mile represent the volume of a cube with sides length equal 1 mile

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3 years ago

Erin recycles milk bottles, soda cans, and newspapers. If the following items are in the trash bin, what percent of the items ca

MakcuM [25]

Answer:

recyclble materials include Milk bottles, news papaers and soda cans

the rest is compost

20 items is the total

13 are recycble

13/20 as a decimal is 0.65

multiply by 100

and answer is

Step-by-step explanation:

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3 years ago

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3 years ago

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1 year ago

What is the radius of a circle given by the equation x2 + y2 – 2x + 8y – 47= 0? radius = units

il63 [147K]

ANSWER

The radius is 8

EXPLANATION

We were given,

${x}^{2} + {y}^{2} - 2x + 8y - 47 = 0$

We rewrite the above equation to obtain,

${x}^{2} - 2x \: \: \: \: + {y}^{2} + 8y \: \: \: \: = 47$

We now add half the square of the coefficient of
$x \: and \: y$
to both sides of the equation to get,

${x}^{2} - 2x + ( - 1) ^{2} + {y}^{2} + 8y + {(4)}^{2} = 47 + ( - 1) ^{2} + {4}^{2}$

We now got two perfect squares on the left hand side of the equation,

$(x - 1)^{2} + {(y + 4)}^{2} = 47 + 1 + 16$

$(x - 1)^{2} + {(y + 4)}^{2} =64$

$(x - 1)^{2} + {(y + 4)}^{2} = {8}^{2}$

By comparing to the general formula of the circle,

${(x - a)}^{2} + {(y - b)}^{2} = {r}^{2}$

We can see that the radius is 8.

4 0

3 years ago

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