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LenaWriter [7]
3 years ago
8

NO LINKS OR ELSE I WILL REPORT. PLS HELP, I WILL GIVE BRAIN THING

Mathematics
1 answer:
vovangra [49]3 years ago
5 0

10 and -12

Step-by-step explanation:

10x-12=-120

it said it needed to be 20 characters long. so this is me making it that

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You want to to buy the PlayStation 5 and it is listed as $449.99 in all the stores
Anna71 [15]

Answer:

Without taxes, the price will be $359.99

Step-by-step explanation:

You take the original price then divide it by ten. Then you multiply that number by 2 to get what 20% of 449.99 is. You then subtract that number from from 449.99. At least I think so. There are other ways to go faster but this is the easiest to understand.

7 0
3 years ago
Hi can anyone help me with this ..​
aleksley [76]

Answer:

n = π/6, π/4, 3π/4, 5π/6

Step-by-step explanation:

sin(3n) − sin n = cos(2n)

Use double and triple angle formulas:

(3 sin n − 4 sin³ n) − sin n = 1 − 2 sin² n

2 sin n − 4 sin³ n = 1 − 2 sin² n

4 sin³ n − 2 sin² n − 2 sin n + 1 = 0

Factor by grouping:

2 sin² n (2 sin n − 1) − (2 sin n − 1) = 0

(2 sin² n − 1) (2 sin n − 1) = 0

Solve:

2 sin² n − 1 = 0

2 sin² n = 1

sin² n = 1/2

sin n = √2/2

n = π/4, 3π/4

2 sin n − 1 = 0

2 sin n = 1

sin n = 1/2

n = π/6, 5π/6

4 0
3 years ago
How many times will the digit '3' appear if we write all whole numbers from 1 to 99?
SSSSS [86.1K]

Answer:

20 times

Step-by-step explanation:

Here is a chart:

3,13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93.

It appears 20 times. Hope this helps!

8 0
3 years ago
What is x + 2^6 + 6(x - 19) if x = 12.7?
vladimir2022 [97]

Answer:

38.9

Step-by-step explanation:

7 0
2 years ago
If x+1/x = 5 find the value of x^3 +1/x^3. pls solve​
Korolek [52]

Answer:

1) solve x+1/x = 5

\frac{x + 1}{x}  = 5

x + 1 = 5x

x - 5x =  - 1

- 4x =  - 1

x =  \frac{ -1}{ - 4}

x =  \frac{1}{4}

2) solve x³+1/x³

x {}^{3}  +  \frac{1}{x {}^{3} }

substitute x = 1/4 into the expression

( \frac{1}{4} ) {}^{3}  +  \frac{1}{( \frac{1}{4}) {}^{3}  }

\frac{1}{64}  +  \frac{1}{ \frac{1}{64} }

\frac{1}{64}  +  \frac{64 \times 1}{1}

\frac{1}{64}   + 64

\frac{4097}{64}  \: or \: 64.02

5 0
3 years ago
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