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viktelen [127]
3 years ago
7

Yuki has saved £100 and spends £22 on a present. Rosetta has saved £140 and spends £28 on a present. What percentage has each gi

rl spent on presents?​
Mathematics
1 answer:
grigory [225]3 years ago
6 0

Answer:

yuki has spent 22 percent , Rosetta spent 20 percent

step by step explanation:

1) if £100=100percent

then £22=x percent

x=(22×100)/100=22 percent

2) if £140=100 percent

then £28= x percent

x=(28×100)/140

x=2800/140

x=20 percent

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Is the function continuous at x = -17
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For a function to be continuous at an x-value, say -17, you need to make sure two things line up:

The limit from the left equals the limit from the right.

     \lim_{x \to -17^{-}} f(x) =  \lim_{x \to -17^{+}} f(x)

This limit equals the functions value.

    \lim_{x \to -17} f(x) = f(-17)

The left hand limit involves the first piece, f(x) = 20x + 1:

    \begin{aligned} \lim_{x \to -17^{-}} f(x) &=  \lim_{x \to -17^{-}} (20x+1)\\[0.5em]&=   20(-17)+1\\[0.5em]&=   -339\endaligned}

The right hand limit invovles the second piece, f(x) = -10x^2:

    \begin{aligned} \lim_{x \to -17^{+}} f(x) &=  \lim_{x \to -17^{+}} (-10x^2)\\[0.5em]&=   -10\cdot (-17)^2\\[0.5em]&=   -2890\endaligned}

Since the two one-sided limits don't match, the function is not continuous at x=-17.

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3 years ago
You have 40 minutes to exercise at the gym, and you want to burn 300 calories total using both
Annette [7]
A and b are the minutes spent on machine A and machine B, respectively.

a+b = 40
b = 40-a

8a + 6b = 300
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2a = 60
a = 30
b = 40-a = 10

30 minutes on machine A and 10 minutes on machine B
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3 years ago
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Help me please? Thanks!
love history [14]

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Step-by-step explanation:


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Answer:

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