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Ipatiy [6.2K]
2 years ago
6

9 • (7 – 4)2 + 9 simplify asap

Mathematics
1 answer:
a_sh-v [17]2 years ago
5 0

Answer:

90

Step-by-step explanation:

9 x (3)2 + 9 first do the parenthesis

9 x 9 + 9 I am assuming the 2 was an exponent

81+9

90

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Help urgent please! evaluate 3^-2?
Inessa05 [86]

Answer:

Step-by-step explanation:

3^{-2}=\frac{1}{3^2}}\\\\=\frac{1}{9}

Hint:

a^{-m}=\frac{1}{a^{m}}

5 0
3 years ago
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Which pair of numbers is relatively prime?
Vilka [71]

Answer:

A. 143 and 63

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The ratio of boys to girls in a class is 2:3. If there are 18 girls in the class, what is the probability of a boy being in the
lukranit [14]

Answer:

0.4

Step-by-step explanation:

If the ratio of boys to girls in a class is 2:3, then

  • there are 2x boys;
  • there are 3x girls.

If there are 18 girls in the class, then

3x=18\\ \\x=6

Thus, there are

  • 2\cdot 6=12 boys;
  • 3\cdot 6=18 girls;
  • 12+18=30 students in total.

The probability of a boy being in the class is

P=\dfrac{12}{30}=\dfrac{2}{5}=0.4

7 0
3 years ago
Help me plz show work
elena-14-01-66 [18.8K]

Answer:

I cant see the question

Step-by-step explanation:

The picture is just an error screen.

3 0
3 years ago
PLEASE HELP ASAP
Lerok [7]

Answer:

A) 2(9x - 2)

Step-by-step explanation:

The greatest common factor of 18x and -4 is 2.

B is wrong because 18 is not the greatest common factor of both, since 4 cannot be divided by 18 and result in a whole number.

C is wrong because 18x cannot be divided by 4 to produce a whole number.

D is wrong because it restates the problem in a different way, therefore not factoring it completely. 1 is a common factor of both, but not the greatest.

4 0
2 years ago
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