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3 years ago

13

simplify negative 3 and 1 over 9 − negative 8 and 1 over 3. negative 11 and 1 over 12 negative 5 and 2 over 9 5 and 2 over 9 11

and 1 over 12

1 answer:

garri49 [273]3 years ago

5 0

-3 1/9 - (-8 1/3) = -3 1/9 + 8 1/3 = 5 2/9

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the temperature dropped to degrees Fahrenheit every hour for 6 hours what was the total number of degrees the temperature change

Umnica [9.8K]

What is the temperature at first.

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3 years ago

in a round robin tennis tournament involving 7 players, each player will play every other player twice. How many total matches w

baherus [9]

Total number of ways to make a pair:

The first player can be any one of 7 . For each of those . . .
The opponent can be any one of the remaining 6 .

Total ways to make a pair = 7 x 6 = 42 ways .

BUT ... every pair can be made in two ways ... A vs B or B vs A .
So 42 'ways' make only (42/2) = 21 different pairs.

If every pair plays 2 matches, then (21 x 2) = <em><u>42 total matches</u></em> will be played.

Now, is that an elegant solution or what !

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3 years ago

A two digit number when read from left to right to right consiststs of consecutive integers. the nmber is six more than for time

Solnce55 [7]

I suppose you want to know such number. Since we have a two digit number consisting of two consecutive integers, the only possible numbers are:

$12,23,34,45,56,67,78,89$

Since we sorted all the cases out, we simply have to check which one satisfies the requirement. For each number, we'll write four times the the sum of its digits, and add 6, hoping to get the original number.

$\text{Number: } 12,\ \ 4\times \text{sum of digits: } 12\ \ \text{plus six: } 18\neq 12$

$\text{Number: } 23,\ \ 4\times \text{sum of digits: } 24\ \ \text{plus six: } 30\neq 23$

$\text{Number: } 34,\ \ 4\times \text{sum of digits: } 28\ \ \text{plus six: } 34$

So, the answer is 34.

3 0

3 years ago

Can someone help me please

navik [9.2K]

Answer:

$the \: answer \: is \: choice \: b \: \frac{ - 2 \sin(x) }{1 + \cos(x) }$

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1 year ago

Given two terms in artimetic sequence find the common difference, the 52 term, and the explicit formula. A15=139 and A30=259

quester [9]

139, 149, 159, 169, 179, 189, 199, 209, 219, 229, 239, 249, 259.

The common difference is 13.

Let n = 52

Let d = common difference

a_52 = 139 + (52 - 1)(13)

a_52 = 139 + (51)(13)

a_52 = 139 + 663

a_52 = 802

4 0

3 years ago