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Naya [18.7K]
2 years ago
8

Which expressions are equivalent to 2^−4·2^2?

Mathematics
1 answer:
Ede4ka [16]2 years ago
5 0

Answer: the answer is 6)

Step-by-step explanation:

Because 2x^{-4} . 2x^{2} = 2x^{-4+2} = 2x^{-2}

I hope it right

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What is 2.8 as a fraction in simplest form
irina1246 [14]
2.8 = 2 + 0.8

*let's analyze the decimal 0.8 as a fraction

0.8 = 8/10

*but if we divide the numerator and denominator by the same common factor of 2, we find that the fraction can be reduced to:

(8/2)/(10/2) = (4)/(5) = 4/5

*now evaluating the whole value of 2 (from the 2.8), we know there are a total of (5) - fifths in order to make a whole, so for 2 whole, we require:

2*(5/5) = (2*5)/5 = 10/5

*Now we add the fractions together:

2 = 10/5
0.8 = 4/5

10/5 + 4/5

*add numerators only, the denominator stays as a 5

(10 + 4)/5 = 14/5

*there are no common factors between 14 & 5 (other than 1, but that won't help reduce the fraction any), so the fraction is in it's simplest form:

answer is: 14/5

8 0
2 years ago
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Let h(x) = x*2 + kw - 8. If h(-1) = -5, what is the value of h(4)?<br> Help
Alisiya [41]

Answer:

h(4) = 0

Step-by-step explanation:

Hoping its ' kx '

h(x) = x^2 + kx -8 \\\\h(-1) = (-1)^2 + k(-1) - 8\\\\-5 = 1 - k -8\\\\-5 = -k -7\\\\-5 + 7 = -k\\\\2 = -k\\-2 = k

Now we have k = -2. We will find h(4).

h(4) = (4)^2 + (-2)(4) - 8 = 16 -8 - 8 = 0

4 0
3 years ago
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Whats the formula for surface area of a trapezoidal prism?
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(b1+b2)h+PH is the formula for surface area of a trapezoidal prism
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Check the picture below.

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lesya692 [45]

Answer:

$ 68.

Step-by-step explanation:

Original price   100

   reduce price 15% ( leaving it at 85% of original price ) = 100 * .85

         reduce it further 20%

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5 0
1 year ago
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