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jeyben [28]
2 years ago
7

The reading of a scale at one end is 3.5 cm and at the other end is 18.5 cm. Calculate the lengths of the needle

Mathematics
1 answer:
Bumek [7]2 years ago
6 0

Answer:

15 cm

Step-by-step explanation:

Given that :

Reading at one end, initial reading = 3.5 cm

Reading at the other end, final reading = 18.5 cm

Length of needle :

Final Reading - Initial reading

18.5cm - 3.5cm

= 15cm

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David has 36 apple and pear trees in his gardens. If he plant 4 more apple trees, he will have the same amount of apple and pear
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Answer:

16 apples, 20 pears

Step-by-step explanation:

36+4=40

So 40/2= 20 or an even amount of both apples and pears

20-4= 16 ~Original amount of apples

36-16=20 ~Amount of pears

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3 years ago
Monifer used substitution to solve this system of equations. Which equation could be the result of her first step? 3a +b=225 b=a
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Given f(x) = 2x^2 - 5x, determine the value of f(4).​
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Answer:

12

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Let x=4

f(4) = 2 (4)^2 -5(4)

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PLEASE HELP!!! I am stuck!
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We have the following information:

first urn: 6 green balls and 3 red ones

total: 6 + 3 = 9

second urn: 3 green, 3 white and 3 red

total: 3 + 3 + 3 = 9

third urn: 6 green, 1 white and 2 red

total: 6 + 1 + 2 = 9

a) A green ball is more likely to be obtained, since there are more green balls than red balls, which makes the probability higher.

b) probability of drawing a green, red and white ball.

first urn:

green = 6/9 = 66.66%

red = 3/9 = 33.33%

white = 0/9 = 0%

second urn:

green = 3/9 = 33.33%

red = 3/9 = 33.33%

white = 3/9 = 33.33%

third urn:

green = 6/9 = 66.66%

red = 2/9 = 22.22%

white = 1/9 = 11.11%

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The probability of drawing would be:

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white = 1/8 = 12.5%

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