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Temka [501]
3 years ago
14

Kalista practices the piano for at least 8 hours each week. Write an inequality for this situation

Mathematics
1 answer:
natali 33 [55]3 years ago
6 0
X≥8 shows the inequality for at least 8
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What are the solutions to the equation 2x^2 - 2x - 12 = 0?
pantera1 [17]
2(x)^2 - 2(x) - 12 = ?
  
2(x)^2 - 2(x) - 12

(x)^2 - 6 - x

Multiply ↪1 (-6) = -6

1 + -6 = -5 , right?

-3 + 2 = -1, right?

After we have pulled out the like terms we have to add/subtract!   x(x) - 3

Search for the common denominator
2(x) - 3

You can add up 4 for your terms
x + 2 (x - 3)

Make sure you solve this↪ 2 = 0

x + 2 = ?
x + 2 = 0
We have found the first; x = -2
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Since, this one has a single variable, I'll make the step easier and quicker

Solve this part ↪    x-3 = 0 
If we had the number 3 to your sides we would have found the outcome of the next x
                    
So, the second x is 3 

So, therefore your answer would have to be x =-2 ; x = 3 (most likely option C.)



5 0
3 years ago
In the lab, Leila has two solutions that contain alcohol and is mixing them with each other. Solution A is alcohol and Solution
torisob [31]

Answer:

300ml

Step-by-step explanation:

As values are missing in your question, the complete question is:

In the lab, Leila has two solutions that contain alcohol and is mixing them with each other. Solution A is 6% alcohol and Solution B is 20% alcohol. She uses 400 milliliters of Solution A. How many milliliters of Solution B does she use, if the resulting mixture is a 12% alcohol solution?

Considering  x=ml of 20% solution B

Therefore, 400+x=ml of resulting 12% solution

Solution A alcohol+ solution B alcohol= Alcohol solution

6% (400)+ 20%x = 12%(400+x)    ->(converting percentage into decimal)

.06*400+.2x=.12(400+x)

24+.2x=48+.12x

.08x=24

x=24/.08=300 ml

she used 300 milliliters of 20%Solution B in resulting mixture.

4 0
3 years ago
Which expression is equivalent to (4g3h2k4)3
Agata [3.3K]
72 ghk4





See explanation









6 0
3 years ago
Two numbers are the multiplicative inverse of each other if their product is​
AveGali [126]

Answer:

the product is 1

Step-by-step explanation:

if you have any number, its multiplicative inverse is 1/ that number

for example 23 has multiplicative inverse 1/23 if you calculate the product you will simplify and always get 1 as a result.

4 0
3 years ago
5×10 to the power of −2 times 6.5x10 to the power of -4
Dominik [7]

Answer:

3.25 x 10^-5

Step-by-step explanation:

( 5 x 10^-2 ) x ( 6.5 x 10^-4 )

1/20 x 13/20000

13/400000

3.25 x 10^-5

7 0
2 years ago
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