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3 years ago

Your teacher has disabled instant marking Your marks will appear after the due date.

1 answer:

4 0

3 Your teacher has disabled instant marking. Your
marks will appear after the due date.
To the nearest pound, Tim has £8
To the nearest 50p, Sue has £4.50
Work out the maximum possible total amount of money.
Give your answer in pounds (£) that is tha answer

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Simplify the expression (3.5x - 2.7y) + (-12.8x + 15.8y)

Paladinen [302]

Answer:

−9.3x + 13.1y

Step-by-step explanation:

7 0

3 years ago

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The average pumpkin weighs 6 pounds. The prize winning pumpkin weighs 324 pounds. The prize winning pumpkin weighs as much as ho

yan [13]

What we're ultimately asking here is how many times 6 goes into 324. The problem becomes a little simpler if we break 324 up into numbers that are easier to work with. 324 = 300 + 24; 6 goes into 300 50 times and 24 4 times, so 6 goes into 324 a total of 50 + 4 = 54 times.

So, the prize-winning pumpkin weighs 54 times as much.

8 0

4 years ago

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Find the opposite of the integer -5.

VLD [36.1K]

Answer:

Step-by-step explanation:

The opposite of -5 is 5. You find this opposite by switching the negative sign to a positive sign.

3 0

3 years ago

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If f is a differentiable function, find an expression for the derivative of each of the following functions

almond37 [142]

12a. Answer: d) x⁶ f'(x) + 6x⁵ f(x)

Step-by-step explanation:

Use the multiplication formula for derivatives:

y = a · b → y' = a'b + ab'

y = x⁶ · f(x)

a = x⁶ b = f(x)

a' = 6x⁵ b' = f'(x)

y' = a'b + ab'

y' = 6x⁵ f(x) + x⁶ f'(x)

***************************************************************

12b. Answer: $\bold{b)\ y=\dfrac{xf'(x)-9f(x)}{x^{10}}'}$

Step-by-step explanation:

Use the division formula for derivatives:

$y=\dfrac{a}{b}$ → $y' = \dfrac{a'b - ab'}{b^2}$

$y=\dfrac{f(x)}{x^9}\\\\a=f(x)\qquad b=x^9\\\\a'=f(x)\qquad b'=9x^8\\\\y'=\dfrac{a'b-ab'}{b^2}\\\\y'=\dfrac{x^9f'(x)-9x^8f(x)}{(x^9)^2}\\\\.\ =\dfrac{x^9f'(x)-9x^8f(x)}{x^{18}}\\\\\text{factor out }x^{8}: y'=\dfrac{xf'(x)-9f(x)}{x^{10}}$

Note: You can also move the denominator to the top (it will have a negative exponent) and use the multiplication formula for derivatives.

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3 years ago

A student can solve 20 problems in 30 minutes. How long would it take him to solve 50 problems? Answer fast please.

stiks02 [169]

The answer will be 60

7 0

3 years ago

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