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HACTEHA [7]
3 years ago
13

Giving brainliest!!!Please help.. :(

Mathematics
1 answer:
RUDIKE [14]3 years ago
4 0

A is the answer 5 times the sum of 3 and 4 then subtract 4

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The diameter of a circle is 10 meters. What is the area of the circle?(use 3.14 for pie and round to the nearest tenth
asambeis [7]

A=78.54

A=1 /4πd2=1 /4·π·10^2≈78.53982m²

Hope this helps

Formulas

A=πr2

d=2r

8 0
3 years ago
Factor completely: 3x2 + 12x + 7
zepelin [54]

Answer:

Step-by-step explanation:

Eliminate answer 4 immediately, because (4)(3) is not 7.

Look at answer 2:  7x + 3x = 10x, which does not match the middle term 12x in the original polynomial.  Eliminate answer 2.

Look at answer 1:  1x + 21x = 22x, which does not match the middle term of the original polynomial.   Eliminate answer 1.

All quadratics have solutions.  Let's apply the quadratic formula to 3x^2 + 12x + 7:  Here a = 3, b = 12 and c = 7, so that the discriminant b²-4ac is

12²-4(3)(7), or 144 - 84, or 60.  Being positive, this tells us that the given poly has two real, unequal roots:

      -12 ± √60        -12 + 2√15                     -12 - 2√15

x = ----------------- = -------------------  and   x = --------------------

            3                         3                                     3

Normally, if c is a root, then x - c is a factor.

If we try this here, however, the resulting factors do not at all match any of your answer choices.

Don't be offended...but please ensure you have copied this problem down correctly.

                                                           

3 0
3 years ago
Urgent~What type of angles are 1 and 5?
Kitty [74]
Corresponding angles ??
6 0
3 years ago
Alan washed 60 plates in 30 minutes. It took him 3 minutes to wash 6 plates. Is the number of plates washed in 3 minutes proport
timofeeve [1]

Answer:

Yes

Step-by-step explanation:

The numbers both multiplied by 10

3 -6

30-60

7 0
3 years ago
Daily fact #1:You can't move your upper teeth.
oee [108]

Answer:

yes

Step-by-step explanation:

yes that is true you are correct

7 0
2 years ago
Read 2 more answers
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