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
Ivanshal [37]
3 years ago
6

A new shopping mall is gaining in popularity. Every day since it opened, the number of shoppers is 20% more than the number of s

hoppers the day before. The total number of shoppers over the first 4 days is 671
Mathematics
1 answer:
ruslelena [56]3 years ago
3 0

Answer:

First term = a = 125

Step-by-step explanation:

Question: find the number of shoppers on the first day

This is a geometric progression question

The sum of the terms = 671

Sum of a geometric sequence,Sn = (ar^n - 1) / (r - 1)

Where,

n = number of term in the sequence.

a = first term in the sequence.

r = common ratio

r = 1 + 20%

= 1 + 20/100

= 1 + 0.2

= 1.2

n = 4 (first 4 days)

Sn = (ar^n - 1) / (r - 1)

Sn = 671 where n = 4

671 = {a × 1.2^(4) - 1} / 1.2 - 1

671 = {a × 2.0736 - 1} / 0.2

671 = (2.0736a - a) / 0.2

671 = 1.0736a / 0.2

671 = 5.368a

Divide both sides by 5.368

a = 671 / 5.368

a = 125

You might be interested in
Find the perimeter of the figure shown above. a. 18 yds c. 20 yds b. 10 yds d. 24 yds Please select the best answer from the cho
ycow [4]
<h3>Answer: 24 yards, choice D</h3>

There are 4 sides to this figure (trapezoid). The left slanted side and the right most vertical side, combined with the top and bottom horizontal sides, will get us the perimeter.

left slanted side = 5 yards

right most vertical side = 4 yards (see note below)

bottom side = 9 yards

top side = 6 yards

Add up the four sides mentioned: 5+4+9+6 = 9+15 = 24

note: the rectangle has opposite sides that are the same length. While the right most side isn't labeled, it is the same length as the left side of the rectangle, so both are 4 yards long.

Another thing I should probably mention is that we do not add in the interior 4 yard side. The perimeter is only the outer or exterior sides we care about. Think of it like we're trying to fence around some property lot and we don't want to subdivide the property up. Finding the perimeter will help us find the amount of fencing needed to surround the property.

4 0
3 years ago
URGENT: Amy and Lucy were doing a craft involving yarn. Amy cut a piece of red yarn that was 4 1/3 inches long, and Lucy cut a p
Jlenok [28]

Answer:

1 11/15

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A line has a slope of 8 and a y-intercept of 2. What is its equation in slope-intercept form?
Bumek [7]

Answer:

y = 8x + 2

Step-by-step explanation:

Slope-intercept form: y = mx + b

m = slope

b = y-intercept value

6 0
2 years ago
Solve the system by the elimination method. -2x + y + 6 = 0 2x + y - 8 = 0 When you eliminate x, what is the resulting equation?
Natali5045456 [20]

For this case we have the following system of two equations with two unknowns:

-2x + y + 6 = 0\\2x + y-8 = 0

Adding both equations we have to eliminate the variable "x":

y + y + 6-8 = 0

Adding common terms, keeping in mind that different signs are subtracted and the sign of the major is placed:

2y-2 = 0\\2y = 2

Answer:

2y = 2

Option A

5 0
3 years ago
Question: solve for x. ​<br><br>please someone help!
Dominik [7]

by angle sum property of triangle,

70+60+(x+60)=180

=> 190 +x = 180

=> x = 180-190

=> x = -10

5 0
3 years ago
Other questions:
  • What is the value of x if the size is 3
    11·1 answer
  • North Carolina: 79.6 years
    15·1 answer
  • Triangle is a scaled copy of triangle . Side measures 20 cm and is the longest side of . Side measures 5 cm and is the longest s
    5·2 answers
  • 7 over 12 minus 5 over 12 as a fraction in simplest form
    8·2 answers
  • The original price of a jacket was 72.50$ Maria used a coupon for 20% off to buy the jacket. How much did she pay before tax?
    7·1 answer
  • Which expression shows the result of applying the distributive property to  −2( 1/3 x− 1/5 )
    10·2 answers
  • Helppppppp pleaseeeeee
    9·1 answer
  • HELP ME PLEASEEEEEEE
    10·1 answer
  • 0.17 with a line over 17 as a fraction
    9·2 answers
  • Who are some good you tubers to watch?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!