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GREYUIT [131]
3 years ago
5

What is the value of f(x) = 2 • 2^x for f(–2)? Will Give brainliest answer!!!

Mathematics
1 answer:
Sedbober [7]3 years ago
5 0
For f(-2), x will equal -2.

Plug the x-value into the equation:

2 \times 2^{-2}

A negative exponent means that the term turns into a fraction, with 1 as the numerator and the positive exponent as the denominator. 
Solve 2^(-2):

2^{-2} =  \frac{1}{2^{2}} =  \frac{1}{4}

Solve the problem:

2 \times \frac{1}{4} = \frac{1}{2}

f(-2) will equal 1/2.
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jeka94

Answer:

Check the explanation

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2 years ago
Make t the subject of the formula p = 4t+1/2-t​
alex41 [277]

Answer:

t = (p - 1/2)/3

Step-by-step explanation:

p = 4t + 1/2 - t​

combine like terms:

p = 3t + 1/2

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8 0
2 years ago
ii. A machine is sold for 7,000/-. The gross loss is 20% of the cost. What are the cost and gross loss?
aleksley [76]

Given:

Selling price of a machine = 7000/-

Gross loss = 20%.

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The cost and gross loss.

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Let x be the cost of machine.

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x-20\%\text{ of }x=7000

x-\dfrac{20}{100}x=7000

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