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2 years ago

Work out the percentage change when a price of £20 is increased to £22.

Mathematics

2 answers:

pav-90 [236]2 years ago

8 0

Answer:

Step-by-step explanation:

20 increased to 22

20/22= 10%

10% of 20.00 is $2.00

2+20 = 22

alina1380 [7]2 years ago

7 0

22-20=2 2/20 = 1/10 = 10% change

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Answer:

$t(x) = 103 -0.0045x$

Step-by-step explanation:

We are given the following in the question:

Let the equation:

$t(x) = a + bx$

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Temperature at 6000-foot level = 76 f

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Solving the two equation, we get,

$76-49 = -6000b\\27=-6000b\\\\b = \dfrac{-27}{6000}\\\\b = -0.0045\\76 = a + (-0.0045)6000\\76 = a -27\\a = 76 + 27\\a =103$

Thus, we can write the linear equation as:

$t(x) = 103 -0.0045x$

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