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azamat
2 years ago
12

7th grade math. Easy but hard for me

Mathematics
2 answers:
alekssr [168]2 years ago
8 0
Feel free to ask me if you didn't understand a part

vivado [14]2 years ago
6 0

Answer:

∠YDC = 140°

∠FAB = 75°

Step-by-step explanation:

17)
The equation

13x-3=55+3x+2

13x-3x=55+2+3

10x=60\\x=60/10=6

∠FAB = 13(6) - 3 = 78 - 3 = 75°

18)

The equation

15x+5=80+6x+6

15x-6x=80+6-5

9x=81\\x=81/9=9

∠YDC = 15(9)+5 = 135 + 5 = 140°

Hope this helps

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I have many students are represented in the data set?
nalin [4]

Answer:

a) 19 students

b) the mean 3 9/19

the median 3

the mode 3

c) the range 6

Step-by-step explanation:

The data set shows that

0 points gets 1 student,

1 point gets 1 student,

2 points get 2 students,

3 points get 6 students,

4 points get 4 students,

5 points get 3 students and

6 points get 2 students.

a) There are 1+1+2+6+4+3+2=19 students.

b) The mean is

\dfrac{1\cdot 0+1\cdot 1+2\cdot 2+6\cdot 3+4\cdot 4+3\cdot 5+2\cdot 6}{19}=\dfrac{66}{19}=3\dfrac{9}{19}.

The average score is 3 9/19 points.

The median is 10th term in the data set - 3 points (means the middle score in the data set)

The mode is 3 points (means most happened score)

c) The range of the data is 6-0=6 points.

7 0
3 years ago
How do you do this problem 1/4 +4x/5=11/20?
Nutka1998 [239]
\frac{1}{4}+\frac{4}{5}x=\frac{11}{20}\\\\\frac{4}{5}x=\frac{11}{20}-\frac{1}{4}\\\\\frac{4}{5}x=\frac{11}{20}-\frac{5}{20}\\\\\frac{4}{5}x=\frac{6}{20}\ \ \ \ \ \ \ |\cdot\frac{5}{4}\\\\x=\frac{30}{80}=\frac{3}{8}
8 0
3 years ago
The sum of the measures of the interior angles of a polygon is 2880°. How many sides does the polygon have?
harina [27]

Let

S------> The sum of the measures of the interior angles of a polygon

n-------> number of sides of a polygon

we know that

The formula to find the sum of the measures of the interior angles of a polygon is equal to

S=(n-2)*180°

in this problem

S=2880°

Solve for n

S=(n-2)*180\\ \\ n=\frac{S}{180}+2\\ \\ n=\frac{2880}{180}+2\\ \\ n=16+2\\ \\ n=18\ sides

therefore

the answer is

18\ sides


5 0
3 years ago
Read 2 more answers
Please help fast! My friend thinks it’s 52 but I think it’s 28.
Marizza181 [45]

Answer:

Hey there!

I'm sorry, but your friend is right.

It is the difference between -40 and 12, which is 52.

Let me know if this helps :)

5 0
3 years ago
Write y = 2x + 3 using function notation.
Setler79 [48]
F(x) = 2x + 3 i think
7 0
3 years ago
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