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Elena L [17]
3 years ago
6

A hair dryer wastes 376J for every 1500J of electrical energy it uses. How efficient is the hairdryer?

Mathematics
1 answer:
Leni [432]3 years ago
8 0

Answer:

\boxed{efficiency, \gamma  = 74.93 \%}

Step-by-step explanation:

efficiency, \: \gamma  =  \frac{1500 - 376}{1500}  \times 100 \\ \gamma  =  \frac{1124}{1500}  \times 100 = 74.93 \\ efficiency, \gamma  = 74.93 \%

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Write 240 and 1500 as products of their prime factor
Marina CMI [18]
240 = 2 × 120
120 = 2 × 60
60 = 2 × 30
30 = 2 × 15
15 = 3 × 5
The 2, 2, 2, 2, 3 and 5 are all the prime factors of 240. So, 2^4 × 3 × 5

1500 = 3 × 500
500 = 5 × 100
100 = 5 × 20
20= 5 × 4
4 = 2 × 2
The 3, 5, 5, 5, 2 and 2 are all the prime factors of 1500. So, 2² + 3 + 5³
4 0
3 years ago
Read 2 more answers
Help:
dalvyx [7]

Answer:

Step-by-step explanation:

a. (11x) + (22x)= 33x

b. (-6x) - (-6x) = 0

c. (-13) + (14x) - (+13t) = -13t + 14x - 13

d. (-4t) + (+4t) - (-6t) = 6t

4 0
3 years ago
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If (x-2) is a factor of x^3+kx^2 +12x-8 then k=?
AURORKA [14]

Answer:

k = - 6

Step-by-step explanation:

Since (x - 2) is a factor then x = 2 is a root

Substitute x = 2 into the polynomial and equate to zero, that is

2³ + k(2)² + 12(2) - 8 = 0

8 + 4k + 24 - 8 = 0

4k + 24 = 0 ( subtract 24 from both sides )

4k = - 24 ( divide both sides by 4 )

k = - 6

5 0
3 years ago
I will give brainliest. I need help ASAP.
Tamiku [17]

Answer:

\I got not answer cause im da BUDDHA

But gimme brainliest squekky plssss

4 0
2 years ago
Factor completly: x^2-2x-24
melisa1 [442]
<span>x^2-2x-24 = (x - 6)(x + 4)

cause
</span>(x - 6)(x + 4)
= x^2 - 6x + 4x - 24
= x^2 - 2x - 24

answer
(x - 6)(x + 4)

hope it helps
4 0
3 years ago
Read 2 more answers
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