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Natasha2012 [34]
2 years ago
8

Three times a number increased by 7 is 100. Find the number.

Mathematics
2 answers:
velikii [3]2 years ago
7 0

Answer:

31

Step-by-step explanation:

100-7= 93

93÷3=31

4vir4ik [10]2 years ago
4 0

Answer:

the number is 31

Step-by-step explanation:

the number is the variable x

3 times the number is 3x

increased by 7 is +7

is 100 is =100

3x +7 =100

subtract 7 from both sides

3x =93

divide by 3 on both sides

x = 31

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Answer:

B.  Sine.

Step-by-step explanation:

We need to find the value of x which is opposite to the given angle  (50 degree).  Also we are given the length of the hypotenuse.

Sine = opposite / hypotenuse so we would use the sine.

Its worth committing this mnemonic to memory, which helps to find the required trig ratio:

SOH-CAH-TOA.

SineOpposite/Hypotenuse- CosineAdjacent/Hypotenuse-TangentOpposite/Adjacent.

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1 year ago
Read 2 more answers
In a sale there is 25% off all prices. A chair costs £45 in the sale. How much was it before the sale?
garri49 [273]

Answer:

60 pounds

Step-by-step explanation:

Let the normal price be p.  The "25%-off" sale price is then 0.75p, and this 0.75p equals 45 pounds.  Dividing both sides by 0.75 results in p = 60 pounds.

3 0
2 years ago
You buy butter for $3.31 a pound.
Sav [38]

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8 0
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1. Gavin and Seiji both worked hard over the summer. Together, they earned a total of $425. Gavin earned $25 more than Seiji. Ho
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Let x = the amount that Seini earned
Then x + 25 = the amount that Gavin
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Together they earned 425:
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Now divide both sides by 2 to find x.

Use all of this data to satisfy the directions.
8 0
3 years ago
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