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Salsk061 [2.6K]
3 years ago
15

Please explain in steps!

Mathematics
1 answer:
iragen [17]3 years ago
5 0

3. \:  {2 + 4^2} - 4+ 2 \\  = 2 + 16 - 4 + 2 \\  = 18 - 4 + 2 \\  = 14 + 2 \\  = 16 \\  \\ 4. \:  {84 + 7}^{2}  - 9 + 2 \\  = 91^{2}  - 9 + 2 \\  = 8281 - 9 + 2 \\  = 8272 + 2 \\  = 8274 \\  \\ 5. \: {5 ^{2}  + 7} + 5 - 6 \\  = 25 + 7 + 5 - 6 \\  = 32 + 5 - 6 \\  = 37 - 6 \\  = 31 \\  \\ 6. \: {4^{2}  + 7} + 4 - 10 \\  = 16 + 7 + 4 - 10 \\  = 23 + 4 - 10 \\  = 27 - 10 \\  = 17 \\  \\ 7. \: 2 - {4 + 2}^{2}  + 9 \\  = 2 - 6^{2}  + 9 \\  = 2 - 36 + 9 \\  =  - 34 + 9 \\  =  - 25 \\  \\ 8. \: 3 - {6 + 3}^{2}  + 9 \\  = 3 - 9^{2}  + 9 \\  = 3 - 81 + 9 \\  =  - 78 + 9 \\  =  - 69 \\  \\ 9. \: {42 + 7}^{2}  - 2 + 5 \\  = 49^{2}  - 2 + 5 \\  = 2401 - 2 + 5 \\  = 2399 + 5 \\  = 2404 \\ \\ 10. \: {2^{2}  + 5} \times 2 - 7 \\  = (4 + 5) \times 2 - 7 \\  = 9 \times 2 - 7 \\  = 18 - 7 \\  = 11 \\  \\ 11. \: 6 \times {66 + 11 - 5}^{2}  \\  = 6 \times 77 - 5^{2}  \\  = 6 \times 72^{2}  \\  = 6 \times 5184 \\  = 31104 \\  \\ 12. \: {78 + 13}^{2} - 8 + 5 \\  = 91^{2}   - 8 + 5 \\  = 8281 - 8 + 5 \\  = 8273 + 5 \\  = 8278

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Hope this helped!

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How do I find the answer to this problume−9−13+2+13minus, 9, minus, 13, plus, 2, plus, 13.
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Answer:

Answer: 12

Step-by-step explanation:

4 0
3 years ago
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X=60° (equilateral triangle)

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PLEASE HELP
ruslelena [56]

Answer:

Rosaria purchased 50 bracelets and 70 necklaces

Step-by-step explanation:

Let the number of bracelets be b and the number of necklaces be n

b + n = 120 •••••(i)

Secondly;

10b + 11n = 1270 ••••(ii)

Total cost of b bracelets at 10 per 1 is 10b

Total cost of n bracelets at 11 per 1 is 11n

Adding both gives 1270

From i, b = 120-n

Substitute this into ii

10(120-n) + 11n = 1270

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b = 120-n

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3 years ago
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