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3 years ago

The price of a book rises from £16 to £20 work out the percentage increase

Mathematics

1 answer:

Vladimir79 [104]3 years ago

5 0

Answer:

25%

Step-by-step explanation:

20-16=4

16…4

1 … 4/16

100…4/16×100

1/4×100

25%

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How sad, that you didn't include the list of choices.

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3 years ago

Decrease 248 by 30%

Snowcat [4.5K]

Okay this equation really says is what is 30% of 248.

So, lets convert 30% to a fraction, 3/10 which is easier to work with.

All you have to do now is get out a calculator and do 248 *3/10 (or .3) and get 74.4

So subtract 74.4 and get

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3 years ago

Anyone know the answer??

Serggg [28]

Answer:

the second option

Step-by-step explanation:

in ax²+bx+c = 0:

$x = \frac{-b+-\sqrt{b^2-4ac} }{2a}$

subtract both sides by 6 to get to this form, as the right side will be left with 0

6x² + 8x - 6 = 0

here, the coefficient for x² (a) is 6, the coefficient for x (b) is 8, and the remaining number added on (c) is -6

plugging our numbers into the formula, we get

$x = \frac{-8+-\sqrt{(-8)^2-4(6)(-6)} }{2(6)}\\= \frac{-8+-\sqrt{64-(-144)} }{12} \\= \frac{-8+-\sqrt{208} }{12} \\ = \frac{-8+\sqrt{208} }{12} or \frac{-8-\sqrt{208} }{12}\\= 0.53518375848 or -1.86851709182\\= approximately -1.87, 0.54$

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2 years ago

Find the surface area of the cube shown.

Alja [10]

A=6a^2

A=6(5.5)^2

A=181.5

Hopefully I answered correctly.

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3 years ago

Read 2 more answers

The price of a book rises from £16 to £20 work out the percentage increase​

The price of a book rises from £16 to £20 work out the percentage increase