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babunello [35]
3 years ago
7

Alice solved the following equation:

Mathematics
1 answer:
son4ous [18]3 years ago
8 0

Answer:

Alice is correct

Step-by-step explanation:

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If sina4/5 find cosa<br>​
DerKrebs [107]

Answer:

cosa = 3/5

Step-by-step explanation:

Use Trignometrical identity cosa =  √ 1 − sin ^2a

cos a =  √ 1 − 16 /25  =  √ 9 /25  =  3 /5

4 0
3 years ago
Help me here i suck at algebra due tomorrow plz explain step by step my english is not very good.
Hoochie [10]
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5 0
3 years ago
Find each equation with the correct solution​
stepladder [879]

Answer:

15;9;-8

Step-by-step explanation:

1. 5/3x-3=2/3x+12

x=15 once you combine like terms

2. 5x+35-3x+12=7x+2

2x+47=7x+2

5x=45

x=9

3. 12x+20-3=9x-7

12x+17=9x-7

3x=-24

x=-8

3 0
2 years ago
Helppppppppppppppppp lol
asambeis [7]

Answer:

There are no solutions.

Step-by-step explanation:

If there is 74 and 54 but with the same 15x: there is no solution. Even with negative.

3 0
2 years ago
Read 2 more answers
Help me with this math for 50 points
Lady_Fox [76]

The hot tub takes in 1,520 watts everyday to keep its water warm. A kilowatt has 1,000 watts (hence kilo means 1,000). 1,520 divided by 1,000 equals 1.520. However, this isn't free electricity - Each kilowatt costs 8 cents or 0.08 of a dollar. 1.520 x 0.08 = 12.160 or $12.16. We aren't done yet! This hot tub runs for 4 months (and we are assuming these months exactly have 30 days each). 4 x 30 = 120. $12.16 x 120 = $1,459.20. In order to keep the hot tub running, you need to pay 1,459.20 for all the kilowatts of electricity it takes.

6 0
3 years ago
Read 2 more answers
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