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frez [133]
3 years ago
13

1. If f(x) = 3x² + x - 2, then f(-2) = 8 12 32 -16

Mathematics
2 answers:
leonid [27]3 years ago
8 0
The answer is A) 8 because x=-2
Vanyuwa [196]3 years ago
4 0

Answer: 8  

x

=

−

2

into  

f

(

x

)

f

(

−

2

)

=

(

3

×

(

−

2

)

2

)

−

(

−

2

)

×

×

=

(

3

×

4

)

+

2

=

12

+

2

=

14

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Vedmedyk [2.9K]
Instead of X put 5 and instead of y put 2
5+6(2)
5+12= 17
7 0
3 years ago
Find the value of x.
OLEGan [10]

Answer:

x=6.09cm

Step-by-step explanation:

Working out AB:

7.5²+4.9²

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To work out x:

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x=8.96/Tan(55.8)

x= 6.09cm

7 0
3 years ago
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Masha biked 20km 20 minutes faster than Dasha biked 20km. Find the speed of each cyclist if one biked 2km/h faster than the othe
motikmotik

Answer:

  • 12 km/h and 10 km/h

Step-by-step explanation:

Let the speed of Masha = s, speed of Dasha = d

  • Distance = 20 km
  • Time difference = 20 min = 1/3 hr
  • Speed difference  = 2 km/h

<u>As per above info we get following equations:</u>

  • s = d + 2
  • 20/s + 1/3 = 20/d

<u>Substitute s and solve for d:</u>

  • 20/(d + 2) + 1/3 = 20/d

<u>Get rid of fraction by multiplying all terms by 3d(d + 2):</u>

  • 60d + d(d + 2) = 60(d + 2)
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<u>Find s:</u>

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<u>The answer is</u>

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3 years ago
Which points on the wave are the trough and the crest?
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Answer:

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6 0
3 years ago
Which of the following points is a solution to the system of linear inequalities
Sergeu [11.5K]
For it to be a solution, it has to satisfy both inequalities...

subbing in (-4,-1)

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solution is (-4,-1)

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3 years ago
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