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Arturiano [62]
4 years ago
5

Help help help help

Mathematics
2 answers:
slega [8]4 years ago
8 0

Answer:

n=4

Step-by-step explanation:

(7+1)+n=(4+7)+1

7+1+n=4+7+1 (subtract 7 from both sides)

1+n=4+1

1+n=5

n=5-1 (Subtract 1 from both sides)

n=4

olga nikolaevna [1]4 years ago
6 0

Answer:

  n = 4

Step-by-step explanation:

Actually, in this problem, you can compare the numbers on the right to the numbers on the left and see that n must be 4 to make the lists match. (It's a problem in pattern matching.)

If you need to, you can rearrange the numbers:

  (7 + 1) + n = (7 + 1) + 4

__

If that doesn't work for you, you can add up the numbers on each side and form the equation ...

  8 + n = 12

In second-grade terms, this is ...

 8 + ___ = 12

Hopefully, you are sufficiently familiar with your math facts to know that 4 will complete this math fact.

__

If that doesn't work for you, then invoke the addition property of equality and add -8 to both sides of the equation.

  8 -8 +n = 12 -8

  n = 4

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nlexa [21]

Problem 1

x = measure of angle N

2x = measure of angle M, twice as large as N

3(2x) = 6x = measure of angle O, three times as large as M

The three angles add to 180 which is true of any triangle.

M+N+O = 180

x+2x+6x = 180

9x = 180

x = 180/9

x = 20 is the measure of angle N

Use this x value to find that 2x = 2*20 = 40 and 6x = 6*20 = 120 to represent the measures of angles M and O in that order.

<h3>Answers:</h3>
  • Angle M = 40 degrees
  • Angle N = 20 degrees
  • Angle O =  120 degrees

====================================================

Problem 2

n = number of sides

S = sum of the interior angles of a polygon with n sides

S = 180(n-2)

2700 = 180(n-2)

n-2 = 2700/180

n-2 = 15

n = 15+2

n = 17

<h3>Answer: 17 sides</h3>

====================================================

Problem 3

x = smaller acute angle

3x = larger acute angle, three times as large

For any right triangle, the two acute angles always add to 90.

x+3x = 90

4x = 90

x = 90/4

x = 22.5

This leads to 3x = 3*22.5 = 67.5

<h3>Answers:</h3>
  • Smaller acute angle = 22.5 degrees
  • Larger acute angle = 67.5 degrees
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2 years ago
The average THC content of marijuana sold on the street is 11%. Suppose the THC content is normally distributed with standard de
zloy xaker [14]

Answer:

:(

Step-by-step explanation:

I am soo Sorry, its too hard

6 0
3 years ago
The perimeter of GHJ
Dafna1 [17]
They have a scale factor of 5:6 so first we need to find the perimeter of KLM:
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\frac{35}{42}  =  \frac{x}{42}
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6 0
3 years ago
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rosijanka [135]
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4 0
3 years ago
Simplify 15.6 divided by negative 3..
Romashka [77]

Answer:

-5.2

Step-by-step explanation:

15.6 ÷ (-3) = -5.2

5 0
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