1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Temka [501]
3 years ago
8

The common ratio of a geometric series is 1/4 and the sum of the first 4 terms is 170

Mathematics
2 answers:
nata0808 [166]3 years ago
8 0

Answer:

128

Step-by-step explanation:

As common ratio is 1/4 ; let the first four terms of the geometric series be :

x , 1 / 4 .x , (1 / 4)2 .x , (1 / 4)3 .x  or

x , x / 4 , x / 16 and  x / 64

Now there sum is  170 , hence

x + x / 4 + x / 16 +  x / 64 = 170 or

(64a + 16a + 4a + a ) / 64  = 170 or

85a / 64 = 170

a = 128

Hence first first term of the series is

128

Hitman42 [59]3 years ago
4 0

Answer:

The first term is 128

Step-by-step explanation:please see attachment for explanation

You might be interested in
Write the following equation in slope-intercept form: y-8= 4(x+10)
tamaranim1 [39]

Answer:

y = 4x + 48

Step-by-step explanation:

Slope intercept form: y = mx + b

y - 8 = 4x + 40

y = 4x + 48

7 0
3 years ago
Read 2 more answers
If f(x) = - 3x - 3. g(x) = 2x2 + 6x - 5. and h(x) = - 8x2 + 6. find f(-3). I REALLY NEED THIS ​
shepuryov [24]

Answer:

f(-3) = 6

Step-by-step explanation:

input -3 in f(x)

so f(-3) = -3(-3) - 3

multiple and add

f(-3) = 6

5 0
4 years ago
What’s slope in this graph?
aniked [119]

Answer:

1/2 !

Step-by-step explanation:

Since it's going up, we know its positive, but if you use RISE/RUN, you would go up 1, then over two, from any point. That makes it 1/2! I went up from the y axis to the next point on the line. I hope that makes sense, but the answer is 1/2!

Have a nice day :D

4 0
3 years ago
PLEASE HELP!! FAST 20 POINTS
Mademuasel [1]
Total money= £14,713.11
6 0
3 years ago
In the graphic below, if W and X are right angles and WY = XY
elena-14-01-66 [18.8K]
Answer is HL

YZ = YZ
WY = XY

<X and <W is right angle

<span>if the hypotenuse and one leg of a right triangle are congruent to the hypotenuse and one leg of another right triangle, then the triangles are congruent</span>
7 0
3 years ago
Other questions:
  • The capacity of a petrol tank is 80 litres. If it initially contains 5 litres and a petrol pump fills it at 3 litres per 10 seco
    14·1 answer
  • 22<br> Solve for x. The figure is a trapezoid.<br> 3x + 18<br> 44<br> Idk
    14·1 answer
  • I need help to match the quadratic equation?​
    13·1 answer
  • WILL MARK YOU BRAINLIEST PLSS HELP
    5·1 answer
  • The weight of a person on or above the surface of the earth varies inversely as the square of the distance the person is from th
    14·2 answers
  • What is 400,000 rounded to the nearest ten thousand
    15·2 answers
  • I will give brainliest if correct!!! Please show work so I know how to do it. :)
    10·2 answers
  • Find the additive inverse or _9.x + 3
    8·1 answer
  • Which of the following is a relative adverb
    6·1 answer
  • Dan makes $72 working 8<br> hours. How much does he<br> make per hour?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!