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Kobotan [32]
3 years ago
9

F(-4); f(x) = x2 + x - 4

Mathematics
1 answer:
Ugo [173]3 years ago
4 0

Answer: 8

Step-by-step explanation: In this problem,

we're asked to find f(-4) or the value of the function when x = -4.

To find the value of the function when x = -4,we simply plug in a -4 for

the x in our function and we have (-4)² + (-4) - 4 or 16 + -4 - 4 which is 8.

So f(-4) = 8.

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Soloha48 [4]

Answer:

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7 0
4 years ago
A 50.0 gram sample decays to 25 grams in 14.4 seconds. What is its half-life?
PIT_PIT [208]

Answer:

The half life is 14.4 seconds because the half life is the time it takes for half of a sample to decay.

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5 0
3 years ago
Larisa earns $7 per hour.she worked 40 hours at the regular rate, 3 hours at time and half, and 6 hours at double time.
VARVARA [1.3K]

Answer:

$6.07/hr. if I understand the question properly.  See below.

Step-by-step explanation:

I don't see the question, but will assume we want to find Larisa's base pay.  The $7/hr given is the average for the work sequence noted in the problem.  If this is incorrect, ignore the answer.

==================================

Let x be Larisa's base salary.  We are told, I think, that in one stretch of time Larisa earned an average of $7/hour.  That was composed of:

<u>Hours</u>  <u>Rate($/hr)</u>

  40           x

    3        1.5x

<u>     6    </u>     2x

  49

Her total income over this period would be:

40x +3(1.5x) + 6(2x)  [The hours worked times the pay rate for each period]

Her average income per hour would be:

(40x +3(1.5x) + 6(2x))/49

which we are told is $7/hr.

(40x +3(1.5x) + 6(2x))/49 = 7

40x + 4.5x + 12x = 343

56.5x = 343

x = $6.07/hr

6 0
2 years ago
*Please Help* (20 POINTS)
Ivahew [28]
Your fraction is: 2/3
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8 0
3 years ago
ASAP!! Please help me. I will not accept nonsense answers, but will mark as BRAINLIEST if you answer is correctly with solutions
GuDViN [60]

Answer:

(4,0)

Step-by-step explanation:

The zeros of the quadratic functions are where it crosses the x axis

It crosses at x=-2 and x=4

( -2,0) and (4,0)

4 0
4 years ago
Read 2 more answers
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