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4 years ago

Which of the following fractions is equivalent to 0.45? 4/5 2/5 9/20 9/200

1 answer:

4 0

45/100
Simplify the fraction by diving by the largest possible factor
45 divided by 5 = 9
100 divided by 5 = 20
9/20
9/20 = 0.45

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4 years ago

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Troyanec [42]

3x - 15

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3 years ago

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There are 300 raffle tickets. The prizes are as follows: First prize - voucher for meal at local restaurant Second prize - food

Andru [333]

Answer:

2/299

Step-by-step explanation:

there were 300 tickets and 1 is out . 299 tickets left

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3 years ago

Rafael is taking a test that contains a section of 12 true-false questions. How many of the possible groups of answers to these

timurjin [86]

Answer:

Step-by-step explanation:

Rafael is taking a test that contains a section of 12 true-false questions. At least 6 correct answers of true means that 6 answers are true, 7 are true, 8 are true, 9 are true, 10 are true, 11 are true or 12 are true.

Then

$C_6^{12}=\dfrac{12!}{6!(12-6)!}=924,\\ \\C_7^{12}=\dfrac{12!}{7!(12-7)!}=792,\\ \\C_8^{12}=\dfrac{12!}{8!(12-8)!}=495,\\ \\C_9^{12}=\dfrac{12!}{9!(12-9)!}=220,\\ \\C_{10}^{12}=\dfrac{12!}{10!(12-10)!}=66,\\ \\C_{11}^{12}=\dfrac{12!}{11!(12-11)!}=12,\\ \\C_{12}^{12}=\dfrac{12!}{12!(12-12)!}=1.$

Hence there are

$924+792+495+220+66+12+1=2510$

possible groups.

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3 years ago

Solve for x. X2 - 20x+ 100 = 0

lianna [129]

Answer:

X will equal 10 x=10

Step-by-step explanation:

First subtract 100 from both sides to get x^2-20x=-100 then find c. (-b/2)^2 is the formula. then c=100 so add 100 to both sides. x^2-20x+100=200. Then Factor. (x-10)^2=0 is what you should get. then do square root. x-10=0. So now add 10 to both sides and you get x=10. Tada!

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2 years ago