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Romashka-Z-Leto [24]
3 years ago
14

Solve by factoring: 2x2 - 5x - 12 = 0

Mathematics
2 answers:
Mumz [18]3 years ago
8 0

Answer:

2 {x}^{2}  - 5x - 12 = 0 \\ 2 {x}^{2}  - 8x + 3x - 12 = 0 \\ 2x(x - 4)3(x - 4) = 0 \\ \\  2x + 3 = 0 \\ 2x = 0 - 3 \\  \frac{2x }{2}  =  \frac{ - 3}{2}  \\ x =  \frac{ - 3}{2}  \\  \\ x - 4 = 0 \\ x = 0 + 4 \\ x = 4

Zepler [3.9K]3 years ago
5 0

Step-by-step explanation:

2 {x}^{2}  - 5x - 12

2 {x}^{2}   - 8x  + 3x - 12

2x(x - 4) + 3(x - 4)

2x  + 3 = 0 \:  \: x - 4 = 0

x =  \frac{ - 3}{2}  \:  \: x =4

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4 0
3 years ago
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Jason claims that the absolute value of a nonzero number is always equal to the opposite of the number.
Ilya [14]

Answer:

See below

Step-by-step explanation:

| -5| = 5  

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7 0
2 years ago
26 divided by 3 I’m horrible at matj
antiseptic1488 [7]
8.66666667 that’s your answer
5 0
2 years ago
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If an hourglass takes an average of 1 hour to empty a full cycle, what probability of time does it take longer than 72 minutes i
Arturiano [62]

Answer:

0.82%

Step-by-step explanation:

First find the z-score.

z = (x − μ) / σ

z = (72 − 60) / 5

z = 2.4

Use a chart or calculator to find the probability.

P(Z > 2.4) = 1 − P(Z < 2.4)

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7 0
3 years ago
At a local swim club you can purchase an annual membership for 24 dollars which will allow you 1 dollar admission to the pool al
777dan777 [17]

Answer:

6 times

Step-by-step explanation:

Let the number of times you visit the pool = x

At a local swim club you can purchase an annual membership for 24 dollars which will allow you 1 dollar admission to the pool all summer.

= $24 + $1× x

= 24 + x

If you do not purchase the membership the pool admission is 5 dollars.

= 5 × x

= 5x

Hence:

24 + x = 5x

Collect like terms

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4x = 24

x = 24/4

x = 6 times

The number of times you must visit the pool with a membership that would equal the cost of paying full price is 6 times.

7 0
3 years ago
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