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Anni [7]
3 years ago
14

Plz help its just math

Mathematics
2 answers:
uranmaximum [27]3 years ago
4 0

Answer:

The solution is -9.

Explanation:

→ 12(\frac{14}{2})-3³ +15 - 9²

→ 6(14)-27+15-81

→ 84-27+15-81

→ -9

Oksi-84 [34.3K]3 years ago
4 0

Answer:

-9

Step-by-step explanation:

use P.E.M.D.A.S. to solve (Parenthese, Exponents, Multiplication, Division, Addition, Subtraction)

12(14/2)-3^3+15-9^2

first, divide 14 by two

(14/2)=7

12(7)-3^3+15-9^2

then, simplify your exponents

3^3=27 (3*3*3)

9^2=81 (9*9)

12(7)-27+15-81

next, multiply 12 by 7

12*7=84

84-27+15-81

Finally, go through and solve the subtraction/addition problems

84-27=57

57+15=72

72-81=-9

Hope this Helps!

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Nana76 [90]

Answer:

b×-5≤-3/4

Step-by-step explanation:

if its at most that means b times -5 is less or equal. (also remember the line under the inequality symbol)

7 0
3 years ago
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Use mathematical induction to prove that for each integer n > 4,5" > 2^2n+1 + 100.
Flura [38]

Answer:

The inequality that you have is 5^{n}>2^{2n+1}+100,\,n>4. You can use mathematical induction as follows:

Step-by-step explanation:

For n=5 we have:

5^{5}=3125

2^{(2(5)+1)}+100=2148

Hence, we have that 5^{5}>2^{(2(5)+1)}+100.

Now suppose that the inequality holds for n=k and let's proof that the same holds for n=k+1. In fact,

5^{k+1}=5^{k}\cdot 5>(2^{2k+1}+100)\cdot 5.

Where the last inequality holds by the induction hypothesis.Then,

5^{k+1}>(2^{2k+1}+100)\cdot (4+1)

5^{k+1}>2^{2k+1}\cdot 4+100\cdot 4+2^{2k+1}+100

5^{k+1}>2^{2k+3}+100\cdot 4

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3 0
3 years ago
The mean length of 10 childrens' big finger is 8.1cm.
sergiy2304 [10]

Answer:

  • The mean length of 10 children's big finger is 8.1 cm

Average length of all the 10 children's finger is (8.1×10) cm = 81 cm.

  • The mean length of 11 adult's big finger is 14.1 cm

Average length of all the 11 adult's big finger is (14.1×11) cm =155.1

  • Mean length of these 21 people's big finger is
  • \frac{(81 + 155.1)}{21}  = 11.242857
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8 0
3 years ago
Plz help me will give crown.
Contact [7]

Answer:

1/3

Step-by-step explanation:

-4/15+3/5

-4/15+3×3/5×3

-4/15+9/15

-4+9/15

5/15

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Hope this helps!

7 0
3 years ago
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Which method will not work?
katen-ka-za [31]
D because if you multiply y 8 times it will no longer be doubling the area
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