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
Arisa [49]
3 years ago
5

Find the sum of the first 90 terms of the sequence –4, –1, 2, 5, 8, ...

Mathematics
2 answers:
Aleks04 [339]3 years ago
8 0
Hello : 
-1-(-4) =2-(-1)=5-2=8-5=3     ( arhtmitic sequence   r= 3)
Un = U1+(n-1)r
U90 = -4+(90-1)(3)= 263
sum = n/2 (U1 +U90)
sum = 90/2(-4+263) = 11655
Juli2301 [7.4K]3 years ago
6 0

Answer:

11655 is correct

Step-by-step explanation:

You might be interested in
2.<br> Find the Area of the Shaded Region. (15 pts)<br> 2 m<br> 7 m<br> 12 m<br> 10 m
sweet [91]

Answer:

120 - 14 = 106

Step-by-step explanation:

7 x 2 = 14

10 x 12 = 120 therefore you,

120 - 14 = 106

3 0
3 years ago
Read 2 more answers
Please help with question ​
AysviL [449]

Answer: i don't I'm sorry

Step-by-step explanation:

4 0
2 years ago
What is the simplified form of the expression?
natali 33 [55]

Answer:

4 sqaure root 24x^3/ 2x

Step-by-step explanation:

See steps below:)

5 0
3 years ago
In a recent​ study, volunteers who had 8 hours of sleep were three times more likely to answer questions correctly on a math tes
Shalnov [3]

Answer:

Step-by-step explanation:

Sleep Deprivation

In a recent study, volunteers who had 8 hours of sleep were three times more likely to answer correctly on a math test than were sleep-deprived participants.

(a) Identify the sample used in the study.

(b) What is the sample's population?

(c) Which part of the study represents the descriptive branch of statitics?

(d) Make an inference based on the results of the study?

Solution

A. The samples used is the hours of sleep and math test scores of the volunteers

B. The samples population is hours of sleep and math test scores of people in general

C. The part of the study that represent the descriptive branch of statistics is "three times more likely"

D.Inference: To perform well in a math test, a person should get at least 8 hours of sleep the night before.

3 0
3 years ago
I need help with this question please
Stella [2.4K]

Answer:

There are all true statements

Step-by-step explanation:

the graph is just trying to confuse you but it's simple just find the letters on the graph then see if they look how the show it below

6 0
2 years ago
Other questions:
  • Rewrite each of the following linear equation in equivalent y=mx+b
    13·1 answer
  • If you roll a number cube 12 times a bout how many times do you expect to roll an odd number
    9·1 answer
  • Maria studied the traffic trends in India. She found that the number of cars on the road increases by 10% each year. If there we
    11·1 answer
  • Urgent!
    8·1 answer
  • A spherical balloon is inflated so that its volume is increasing at the rate of 2.9 cubic feet per minute. How rapidly is the di
    13·1 answer
  • Its cost $3.55 to make a sandwich at the local deli shop to make a profit the deli sells it at a price that is 160% of the cost.
    9·2 answers
  • Why is y =ax+b called a linear equation
    9·1 answer
  • List all the factors of the number 30.
    11·1 answer
  • Which expression is equivalent to 6^2\cdot4^36
    6·1 answer
  • Jackson has 3/4 whole box of cereal. he eats 1/10 of the cereal each day. hour many days will the cereal last​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!