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ycow [4]
3 years ago
11

Help pleaseeeeee thanks so much

Mathematics
2 answers:
adoni [48]3 years ago
8 0

Answer: n = 31

Step-by-step explanation: Remember that the word <u>sum</u> mean addition.

So the sum of twice a number and 13 means 2n + 13 = 75.

So our equation is 2n + 13 = 75.

Now let's solve the equation.

Start by subtracting 13 from both sides to get 2n = 62.

Now, divide both sides by 2 and we have n = 31.

aleksklad [387]3 years ago
4 0

Answer:

The answer is n = <u>31</u>

Step-by-step explanation:

Equation:   <u>2n + 13</u> = 75

2n = 75 - 13

2n = 62

n = 62/2

n = 31

check:

2*31 + 13 = 75

62 + 13 = 75

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the sum of three numbers is 128.The third number is 10 more than the first .The second number 4 times the third number. what are
Ray Of Light [21]
128 = a + + 4(a + 10) + (a + 10)
128 = a + 4a + 40 + a + 10
128 = 6a + 50
128-50 = 6a
78 = 6a
13 = a

1st = a = 13
2nd = 4(a + 10) = 4(23) = 92
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3 0
3 years ago
I don't know how to answer the top two and I don't know if the bottom one is correct, help me please
Tpy6a [65]
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     Now look at this, 3/4 x 6 = 4 1/2.  4 1/2 is the same as 9/2


   3/4 + 3/4 + 3/4 + 3/4 + 3/4 + 3/4 ---> takes 6, 3/4's to make 9/2

2)  How many 3/4's go into 9/2?


    This is the same question as the 1st one so the answer is 6 :)


3)  9/2 divided by 3/4 = ??


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6 0
3 years ago
Evaluate the expression:
pickupchik [31]
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2 years ago
For what value of a is the volume of the tetrahedron formed by the coordinate planes and the plane (x/a) (y/10) (z/6)
kotykmax [81]

This question is incomplete, the complete question is;

For what value of a is the volume of the tetrahedron formed by the coordinate planes and the plane (x/a) + (y/10) + (z/6) = 1 equal to 10?

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Step-by-step explanation:

Given that;

Volume of tetrahedron bounded by plane (x/a) + (y/10) + (z/6) = 1

and coordinate plane is; V = 1/6|abc|

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volume = 10

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10 = 1/6 | a × 10 × 6 |

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Therefore the value of a is 1

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3 years ago
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2 years ago
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