Find the geometric sum: 40 + 20 + 10 + … + 0.078125

Answer: This algebra lesson explains geometric series. ... To find the sum of the first n terms of a geometric sequence: Sn = the summation of ... 5 , -10 , 20 , -40 , 80 , .

Related Questions

So far this year, a company has sold 8.28×10^5 tablet computers. How many more tablets must the company sell for it's tablet sales to reach 1 million this year? Explain how you solved this problem

So far this year, a company has sold 8.28×10^5 tablet computers. How many more tablets must the company sell for it's tablet sales to reach 1 million thisyear? Explain how you solved this problem

The standard form of 8.28 × 105 is 828,000. Subtract this number from 1 million: 1,000,000 - 828,000 = 172,000.

Answer: 172,000 or 1.72 × 105

a right triangle has legs measuring 4.5 meters and 1.5 meters the lengths of the legs of a second triangle are proportional to the lengths of the legs of the first triangle which could be the lengths of the legs of the second tiangle please answer i really need help in this question thanks

One approach that might be a great help would be if you would look
at the choices ... those things at the bottom of the question that you
didn't give us.

-- One leg is 3 times the length of the other leg.

-- Any right triangle that has one leg three times as long as the other
leg is similar to this triangle.

I'll bet that if you look through the choices, you'll find one there.

Since they are proportional, it doesn't make much of a difference.

Need Help ASAP!!! Solve the system by elimination.

-2x+2y+3z=0
-2x-y+z=-3
2x+3y+3z=5

x = 1

y = 1

z = 0

Step-by-step explanation:

-2x + 2y + 3z = 0             (1)

-2x - y + z = -3                  (2)

2x + 3y + 3z = 5              (3)

Solve (1) and (2)

Multiply 2 by 2

-2x + 2y + 3z = 0

-4x -2y   + 2z = -6

-6x          + 5 z = -6        (4)

Solve (2) and (3)

Multiply 2 by 3

-6x - 3y + 3z = -9

2x + 3y + 3z = 5

-4x         + 6z = -4           (5)

Solve (4) and (5)

Multiply (4) by 2 and (5) by -3

-12x    + 10 z = -12

12x    -  18z   = 12

-6z = 0

z = 0

Then

-4x + 6(0) = -4

-4x = -4

x = -4/-4

x = 1

Finally

-2(1) - y + (0) = -3

-2 - y = -3

-y = -3 + 2

y = 1

Steps:

isolate " x "  for -2x + 2y  + 3z  = 0 ;    x = -  ( - 3z - 2y ) / 2

Subsititute : x = -  ( - 3z - 2y ) / 2

- 2 * (  - ( - 3z - 2y ) / 2 ) - y + z = - 3

2 * ( -  ( - 3z - 2y ) / 2 ) + 3y  + 3z  =5

isolate " z " for  :  - 2  ( -  ( - 3z - 2y ) / 2 ) - y+ z = - 3 ;  z = - ( - 3 +  3y / 2 )

subsititute  z = - ( - 3 + 3y / 2 ) :

2* ( - ( -3* ( - ( - 3 +3y / 2 ) - 2y / 2  ) + 3y  + 3  ( - ( - 3 + 3y / 2 ) = 5

isolate y for 2 ( -( - 3 ) - 3 + 3y / 2 ) - 2y / 2 ) + 3y + 3 ( - ( - 3 + 3y / 2 ) = 5

y = 1

for z =  - ( - 3+ 3y ) / 2

subsititute y = 1

z = - ( - 3 + 3  * 1 ) / 2

z =  0

For x  = - ( - 3z - 2y ) / 2

subsititute y = 1

subsititute z = 0

x = -  ( - 3 *0 - 2 * 1 ) / 2

x =  1

x = 1  , y =  1  , z = 0

A bag contains two red marbles and five blue marbles. you draw a marble, record its color, replace it, and then draw a second marble. what is the probability that you draw a blue marble at least once? a.0.28
b.0.49
c.0.71
d.0.92

2+5 = 5 total marbles

5 are blue so you have a 5/7 chance of picking blue each time

5/7 = 0.714 rounded to 0.71

Step-by-step explanation:

Given : Number of blue marbles in bag = 5

Number of red marbles in the bag = 2

Total marbles in bag= 5+2=7

Since,  we draw a marble, record its color, replace it, and then draw a second marble.

It means every outcome is independent of each other.

Now, the probability that you draw a blue marble at least once = 1- P(no blue marble drawn)

=

Hence, the probability that you draw a blue marble at least once= 0.92

Hence, the correct answer is d. 0.92 .

You get paid 20 dollars for 4 hours of work what is your hourly rate?

To find the hourly rate you would divide . 20 dollars/4 hours gives you \$5 per hour
5\$ an hour 5 dollars x 4 hours = 20 dollars

Rita’s class begins social studies at ten minutes before one in the afternoon. At what time does Rita’s class begin social
studies? Circle a time that makes the sentence true.

Rita’s class begins social studies at
1:10 a.m.
1:10 p.m.
12:50 a.m.
12:50 p.m

12:50 p.m, I hope this helped
12:50 a.m because “afternoon” means p.m and if you subtract 1:00 (afternoon starting time) by 10 or go back 10 minutes you would get 12:50 A.M

You can answer only this question, it's ok: 1)What would be the measurement of the smaller angle between the minute hand and the hour hand of a clock when the time is 4:40??
A: 100
B: 120
C: 140
D: 160
E: 180
Optional question:
2)Which equation will produce a line that will pass through the point (0, 0)?
A: x=2y+5
B: x=y-3
C: x=4y
D: x= 7y-2
E: x=y+x/3+20

1)100 or A
Angle = |30*H - (11/2)*M|, where H is the hours hand and M is the minutes hand

in this case: H = 4, M= 40
30*4 - (11/2)*40 = 120 - 220 = -100 = |-100| = 100
2)x=4y or C
If you plug in 0,0 you will get 0=4×0 or 0,0

which property is illustrated by the equation below (r+s)+t=r+(s+t). A)Associative B)Commutative C)Distributive D)Identity