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lisabon 2012 [21]
3 years ago
9

Select the correct answer.

Mathematics
2 answers:
abruzzese [7]3 years ago
6 0

Solution's

radius =6

Circumference=?

(21π\2)

21* 6/2

=63

tatiyna3 years ago
4 0
E none of the above for the correct answer
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Ten times an integer is added to seven times it’s square. If the result is 152, what was the original number?
Bess [88]

Answer:

Required number is 4.

Step-by-step explanation:

Let the required number be a.

Given,

Sum of ten times the integer and seven times it’s square is 152.

= > Ten times of a + seven times of it's square = 152

= > 10( a ) + 7( a )^2 = 152

= > 10a + 7a^2 - 152 = 0

= > 7a^2 + 10a - 152 = 0

= > 7a^2 + ( 38 - 28 )a - 152 = 0

= > 7a^2 + 38a - 28a - 152 = 0

= > a( 7a + 38 ) - 4( 7a + 38 ) = 0

= > ( a - 4 )( 7a + 38 ) = 0

= > a = 4 or - 38 / 7

Hence the required number is 4.

3 0
2 years ago
8x - 3(5 + 9x what's the simplified algebraic expression p​
Mashcka [7]

=8x + (-3) (5) + (-3) (9x)

=8x + -15 + -27x

=8x + -15 + -27x

(8x + -27x) + (-15)

19x +-15

19x -15

4 0
3 years ago
HELP ASAP!!!!!!!!!! in triangle ABC, m
Mashutka [201]

Answer:

I think it is C

Step-by-step explanation:

3 0
2 years ago
| 19) -6.5<br> What is the answer
Rashid [163]

Answer:

the answer will be 3.5 i think

Step-by-step explanation:

8 0
3 years ago
A survey was given to 339 people asking whether people like dogs and/or cats.
lina2011 [118]

Answer:

80

Step-by-step explanation:

Think of it as a Venn diagram.  One circle is the people who like dogs, and one circle is the people who like cats.  The overlap is people who like both dogs and cats.

190 people in the survey said they like dogs.  That includes the people who like both dogs and cats.

141 people in the survey said they like cats.  That includes the people who like both dogs and cats.

If we simply add the two numbers together, we'll be counting the overlap twice.  So to find the total number of people who like dogs or cats, we have to subtract one overlap.

dogs or cats = 190 + 141 − x

Therefore:

190 + 141 − x + 88 = 339

419 − x = 339

x = 80

80 people said they liked both cats and dogs.

5 0
2 years ago
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