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tatuchka [14]
2 years ago
15

Find f(-3) for f(x) = 4(2)^x.

Mathematics
1 answer:
monitta2 years ago
3 0

Answer:

1/2

Step-by-step explanation:

f( - 3) = 4 {(2)}^{ - 3}  =  \frac{1}{2}

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May someone please help? thank you!
tester [92]

Answer:

6\sqrt2\\OR\\8.48528137

Step-by-step explanation:

The area of a sector of a circle is found by:

A = \frac{\theta*r^2}{2}

The question asks for the radius so the equation above can be repurposed

r = \sqrt\frac{2A}{\theta}

A = 3pi

angle = pi/12

\frac{6\pi}{\pi/12} = \frac{72\pi}{\pi} = 72

\sqrt{72} = 6\sqrt2 = 8.48528137

7 0
3 years ago
Denise earns $30 an hour. She works 40 hours per week. A. Create and solve an expression to represent how much money Denise earn
Mariana [72]

Answer:

Denise will earn $350 per week. The expression is 30 + 40 = 70. Denise will earn $70.

Step-by-step explanation:

5 0
3 years ago
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A car averages 27.5 miles per gallon of gasoline. how many liters of gasoline will be needed for a trip of 489 km
slega [8]
27.5 miles/gal = 44.25697 km/gal
489km/44.25697= 11.05gallons
11.05 gal = 41.6395 or 41.64 liters
4 0
4 years ago
What is the value of 2x in this equation<br> 5x - 2(2x - 1) = 2(3x - 4)
KiRa [710]

Answer:

4

Step-by-step explanation:

Step 1: Write equation

5x - 2(2x - 1) = 2(3x - 4)

Step 2: Solve for <em>x</em>

  1. Distribute: 5x - 4x + 2 = 6x - 8
  2. Combine like terms: x + 2 = 6x - 8
  3. Subtract x on both sides: 2 = 5x - 8
  4. Add 8 to both sides: 10 = 5x
  5. Divide both sides by 5: 2 = x
  6. Rewrite x = 2

Step 3: Check

<em>Plug in x to verify it's a solution.</em>

5(2) - 2(2(2) - 1) = 2(3(2) - 4)

10 - 2(4 - 1) = 2(6 - 4)

10 - 2(3) = 2(2)

10 - 6 = 4

4 = 4

Here we see that x = 2 is indeed a solution

Step 4: Find 2x

2(2) = 4

7 0
3 years ago
Read 2 more answers
Can someone please help me?
denis23 [38]
Number 5 is 280 ft because you would just do 20x14
4 0
3 years ago
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