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jeka94
2 years ago
6

If three times a certain number is increased by 4 the result is 28

Mathematics
2 answers:
alex41 [277]2 years ago
7 0
The number is 8. You work backwards. 28-4=24. 24/3=8
Anastasy [175]2 years ago
3 0

Answer:

The number is 8

Step-by-step explanation:

Let x be the number

3x+4 = 28

Subtract4 from each side

3x+4-4 = 28-4

3x= 24

Divide by 3

3x/3 =24/3

x = 8

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In the triangle below, suppose that m < K = (5x - 3) degrees, m < L = (6x - 9) degrees, and m < M = x degree.
MakcuM [25]

Answer:

x = 16

angle K = 77

angle L = 87

angle M = 16

Step-by-step explanation:

Mathematically, the sum of interior angles of a triangle is 180 degrees

Thus:

(5x-3) + (6x-9) + x =180

12x -12 = 180

12x = 180+12

12x = 192

x = 192/12

x = 16

Angle K = 5x-3 = 5(16)-3 = 80-3 = 77

Angle L = 6(16)-9 = 96-9 = 87

Lastly;

angle M = 16 degrees

4 0
3 years ago
A group of 5 friends each have x action figures in his or her collection. Each friend buys 11 more
posledela

Answer:

D. 5(x + 11)= 120

Step-by-step explanation:

5 is the number of friends, and they have an unknown number of action figures before buying 11 more.

So we multiply 5 by the number of action figures they have (x) and add 11 because they all bought 11.

Then we make it equal to 120 because thats the total number of action figures.

(I know this isnt part of the question but if you solve for x, you find out that they all had 13 action figures to begin with)

Hope it helps!

5 0
4 years ago
Read 2 more answers
What is the area of The shaded sector of the circle
Basile [38]
Area of circle = pi r^2 = 81pi

1/3 of circle = 81pi / 3 = 27 pi units^2

answer
B. 27 pi units^2

8 0
3 years ago
Read 2 more answers
Please help this might be easy for some people but I’m just not smart
Verizon [17]

Answer: D:(-1,4)

R:(-4,4)

Step-by-step explanation:

I hope that correct

7 0
3 years ago
The fifth term of an arithmetic sequence is 23 and the 12th term is 72? Determine the first three terms of the sequence and the
Arisa [49]

Answer:

the first term is a1

the distance between the numbers is d

we have:

a5 = a1 + 4d = 23

a12 = a1 + 11d = 72

so we have the equation:

a1 + 4d = 23

a1 + 11d = 72

=> a1 = -5

d = 7

=> an = -5 + 7(n - 1) = 7n - 12

with an = 7n - 12

=> a2 = 2

a3 = 9

so the first three terms is -5; 2; 9

6 0
3 years ago
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