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serg [7]
3 years ago
8

I NEED HELP PLEASE, THANKS! :)

Mathematics
1 answer:
Phantasy [73]3 years ago
6 0

Answer:

Step-by-step explanation:

Step1 : Verify Sn is valid for n = 1

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How to find area? will give..
ch4aika [34]

Answer:

Step-by-step explanation:

A=πr2

Circumference = 2πr

20π = 2πr

r=10

π=3.14

A=3.14 * 10^2

=314 cm^2

3 0
3 years ago
What is 15%of8700 please give the right answer
posledela
15% becomes 0.15
multiply it by 8700
0.15x8700=1305
7 0
2 years ago
Read 2 more answers
What is the measure of angle B in degrees?<br> A) 30<br> B) 45<br> C) 60<br> D) 90
Triss [41]

Answer:

its a 30 my friend and if its not a then choose b hope this helped

Step-by-step explanation:

5 0
2 years ago
A and B are complementary angles. If A = (x – 23)° and m
Lana71 [14]

Answer:

∠ B = 85°

Step-by-step explanation:

Complementary angles sum to 90° , then

x - 23 + 2x + 29 = 90 , that is

3x + 6 = 90 ( subtract 6 from both sides )

3x = 84 ( divide both sides by 3 )

x = 28

Then

∠ B = 2x + 29 = 2(28) + 29 = 56 + 29 = 85°

5 0
2 years ago
Please help<br><br>problem 1, 2 and 3​
laila [671]

Answer:

See attached

Step-by-step explanation:

When there is a lot of repetitive calculation to do, I like to let a spreadsheet or graphing calculator do it. The attached shows a spreadsheet that computes all the values you're asked to find.

For a linear equation in standard form, ax +by = c

  • the x-intercept is: c/a
  • the y-intercept is: c/b
  • the slope is: m = -a/b

Of course, the slope-intercept form of the equation is ...

  y = (slope)·x + (y-intercept)

and the values of the various points on the graph can be computed from that equation.

___

You will note that the last two equations describe the same line.

_____

<em>Note on spreadsheet formulas</em>

When you put the formulas into the spreadsheet, make sure to fix the column number or row number of the values you're computing, as appropriate. For example, the y-values in the different columns always use the slope from the slope column (fixed), the y-intercept from that column (fixed), and the x-value from the top row (fixed). If you make the cell references relative instead of fixed, you will get wrong answers.

4 0
2 years ago
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