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4 years ago

The sum of twice a number and three equals five. Find the number

2 answers:

6 0

2n + 3 = 5
2n = 2
n = 1
the sum of 2 times a number and three means you add 2n + 3 and since it is equal to 5 you then solve for n.

marta [7]4 years ago

4 0

Let ' a number ' = x

twice a number = 2x

The sum of 2x and three = 2x + 3

...equals five: 2x + 3 = 5

Find the number
-------------------------------------------------------------------------------------------------------
2x + 3 = 5

Isolate the x. Do the opposite of PEMDAS. Note that because of the equal sign, what you do to one side, you do to the other.

Subtract 3 from both sides
2x + 3 (-3) = 5 (-3)

2x = 5 - 3

2x = 2
divide 2 from both sides
2x/2 = 2/2

x = 2/2

x = 1

x = 1 is your answer

hope this helps

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4 years ago

Amelia and Elliott are collecting empty soda cans for recycling. Amelia has 13 less than 5 times the cans that Elliott has. Toge

xeze [42]

Answer:

D.) Elliott has 212 cans, Amelia has 45 cans

Step-by-step explanation:

257 = x + (5x - 12)

257 = 6x - 13

+13 +13

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45 = x (the amount of Amelia's cans)

257 - 45 = 212 (the amount of Elliott's cans)

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3 years ago

Suppose a baseball team has 14 players on the roster who are not members of the pitching staff. Of those 14 players, assume that

Nadusha1986 [10]

Answer: Our required probability would be 0.70.

Step-by-step explanation:

Since we have given that

Number of players = 14

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Number of members chosen randomly = 5

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P(Atleast 1) = 1 - P(none is found to have taken a performance enhancing drug)

So, P(X≥1)=1-P(X=0)

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Hence, our required probability would be 0.70.

7 0

3 years ago

What is the length of the altitude of the equilateral triangle below

ale4655 [162]

Using Sine.

Sine = Opposite / Hypotenuse

sin 60° = a / (6√3) But sin60° = √3/2

√3/2 = a/(6√3)

Cross multiply

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2a = 6 * √(3*3)

2a = 6*3

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Option E.

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