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vredina [299]
3 years ago
5

Evaluate x2 + 3x ; x = -3

Mathematics
1 answer:
stepladder [879]3 years ago
5 0
The answer would be -15
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4x^2-16=x^2+32<br> Using reverse PEMDAS
telo118 [61]

Answer:

x = ±4 (x = 4 and x = -4)

Step-by-step explanation:

4x²-16 = x²+32

3x²-16 = 32

3x² = 48

x² = 16

x = ±4

Therefore, x = 4 and x = -4

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Alex17521 [72]
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7 0
3 years ago
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Susan drove at an average speed of 30 miles per hour for the first 30 miles of a trip and then at an average speed of 60 miles p
maxonik [38]

Answer: option B is the correct answer.

Step-by-step explanation:

Susan drove at an average speed of 30 miles per hour for the first 30 miles of a trip.

Time = distance/speed

This means that time spent by Susan in travelling the first 30 miles would be

Time = 30/30 = 1 hour

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Time = 30/60 = 0.5 hours

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Average speed = 60/1.5 = 40 miles per hour.

7 0
3 years ago
Given f(x)=3x+4, find f(2)
eduard

Answer:

-2/3

Step-by-step explanation:

8 0
2 years ago
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