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lys-0071 [83]
3 years ago
9

Thanks in advance! the image below is my question

Mathematics
1 answer:
ankoles [38]3 years ago
3 0
Since opposite angles are the same:
angle DEC = 130

We know angle BEC + AED = 360 - 130*2
Since angles in a circle add up to 360 degrees:
BEC + AED = 360 - 260
BEC + AED = 100
This means that BEC = 50  and 
                           AED = 50

Now that we know 2 angles in the triangle CEB we can work out y:
y = 180 - 50 - 70
y = 60 degrees 

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List the first 5 terms of the sequence -3n -2.<br>​
katrin2010 [14]

Answer:

-5,-8,-11,-14,-17

Step-by-step explanation:

-3n -2

n=1   -3(1) -2 = -3-2 = -5

n=2   -3(2) -2 = -6-2 = -8

n=3   -3(3) -2 = -9-2 = -11

n=4   -3(4) -2 = -12-2 = -14

n=5   -3(5) -2 = -15-2 = -17

7 0
3 years ago
Read 2 more answers
You need to split it in half then multply then add
rusak2 [61]

Answer:

100 ft^2

Step-by-step explanation:

The large upper rectangle has dimensions 12 ft by 23 ft, and thus has area 276 ft^2.  The small lower rectangle is 15 ft by (12 - 7) ft,  or 15 t by 5 ft, and thus has area 75 ft^2.  The total area is

75 ft^2 + 25 ft^2, or 100 ft^2.

8 0
3 years ago
11. If f(x)=4x-9, what is the equation for f^-1(x)?
FrozenT [24]
F(x) = 4x - 9

let f(x) = y, this implies that  x = f⁻¹(y)

y = 4x - 9           Let us solve for x.

4x - 9 = y

4x = y + 9

x = (y + 9)/4

Recall that x = f⁻¹(y),

x = (y + 9)/4

f⁻¹(y) = (y + 9)/4

That means that for f⁻¹(x)

f⁻¹(x) = (x + 9)/4

Hope this explains it.
3 0
3 years ago
What is a "recursive formula” in terms mathematical sequences?
crimeas [40]

Answer:

A formula that finds a term using the previous term

Step-by-step explanation:

It's just terminology. Don't beat yourself up over it.

3 0
4 years ago
Read 2 more answers
Anna-Maria has added 4 quarts of an alcohol in water solution to 1 quart of water and her ending product is a 36% alcohol in wat
fomenos
The concentration of solution would be the amount of the molecule divided by the volume. In this case, the solution concentration is 36% and the volume is 4 quarts + 1 quarts= 5 quarts. You are asked the concentration before 1 quarts added. The alcohol content should be same for both solutions. The answer should be:

concentration = alcohol content/ volume
alcohol content =concentration * volume
alcohol content1 =alcohol content2
36% * 5 quarts = concentration2 * 4quarts
concentration2= 36% * 5 quarts / 4 quarts= 45%
5 0
4 years ago
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