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kap26 [50]
3 years ago
5

Write a recursive formula and an explicit formula for the following arithmetic sequence

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
6 0
Ummmmm add 4? The difference between each number is the same
You might be interested in
What two numbers add up to 6 and multiply to 12?
GuDViN [60]
Erm

x+y=6
xy=12


x+y=6
y=6-x
sub back

xy=12
x(6-x)=12
6x-x^2=12
x^2-6x=-12
x^2-6x+12=0
quadratic formula
for
ax²+bx+c=0
x= \frac{-b+/- \sqrt{b^2-4ac} }{2a}

for
x²-6x+12=0
a=1
b=-6
c=12
and remember that √-1=i

x= \frac{-(-6)+/- \sqrt{(-6)^2-4(1)(12)} }{2(1)}
x= \frac{6+/- \sqrt{36-48} }{2}
x= \frac{6+/- \sqrt{-12} }{2}
x= \frac{6+/- (\sqrt{-1})(\sqrt{12}) }{2}
x= \frac{6+/- (i)(2\sqrt{3}) }{2}
x= \frac{6+/- 2i\sqrt{3} }{2}
x=3+/-i√3

the numbers are 3+i√3 and 3-i√3
no real numbers tho
7 0
3 years ago
A man sold his house for $125,000. After paying he broker his commission, the man received $116,875. What was the broker’s commi
PilotLPTM [1.2K]

116875 = (x / 100) * 125000

116875 = x * 125000 / 100

116875 = 1250x (The zeros get cancelled)

Therefore, x = 116875/1250 = 187/2 = 93.5%

4 0
3 years ago
Help ASAP!!
Aleksandr [31]

Circumference of a circle - derivation

This page describes how to derive the formula for the circumference of a circle.

Recall that the definition of pi (π) is the circumference c of any circle divided by its diameter d. Put as an equation, pi is defined as

π

=

c

d

Rearranging this to solve for c we get

c

=

π

d

The diameter of a circle is twice its radius, so substituting 2r for d

c

=

2

π

r

If you know the area

Recall that the area of a circle is given by

area

=

π

r

2

Solving this for r

r

2

=

a

π

So

r

=

√

a

π

The circumference c of a circle is

c

=

2

π

r

5 0
3 years ago
Read 2 more answers
A blueprint for a house states that 2.5 inches equal 10 feet. If the length of a wall is 12 feet how many inches is the wall in
Xelga [282]
If 10 feet = 2.5 inches
then 1 feet = 2.5/10 = 0.25
therefore 12 feet = 3 inches

In short the answer is 3 inches on the blueprint
4 0
3 years ago
X increased by 6 algebraic expression
ddd [48]

Step-by-step explanation:

x increased by 6 is :

= x+6

3 0
2 years ago
Read 2 more answers
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