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
Lady_Fox [76]
3 years ago
15

Person a can paint the​ neighbor's house 22 times as fast as person

Mathematics
1 answer:
Levart [38]3 years ago
5 0
Let 1/x=the time it takes for person b to paint
let 1/22x the time that it takes for person a to paint
lastly we have the following since we know that when they work together that is how long it takes
\frac{1}{x}  + \frac{1}{22x} = \frac{1}{77}
to solve we first multiply both sides by 1694x
1694 + 77 = 22x
we then combine like terms
1771 = 22x
lastly we divide both sides by 22
80.5 = x
You might be interested in
A researcher at a major clinic wishes to estimate the proportion of the adult population of the United States that has sleep dep
Thepotemich [5.8K]

Answer: n = 600.25 ≈ 601 ( sample size)

the minimum sample size of the adults in United State who have sleep deprivation  is 601

Step-by-step explanation:

Given that;

the confidence level = 95% = 0.05

the Margin of error E = 4% = 0.04

∴  level of significance ∝ = 1 - C.L

∝ = 1 - (95/100)

= 0.05

Z∝/2 = 0.05/2 = 0.025

Z-critical value at 95% confidence level is OR level of significance at 0.025 = 1.96 (z-table)

Now to calculate the sample size, we say

n = (Z(critical) / M.E )² P ( 1 - P)

now we substitute

n =  (1.96 / 0.04)² × 0.5 ( 1 - 0.5)

n = 2401 × 0.5 × 0.5

n = 600.25 ≈ 601

Therefore the minimum sample size of the adults in United State who have sleep deprivation  is 601

6 0
4 years ago
What is the factored form of 20x - 10y + 15z?
ivanzaharov [21]

Answer:

5 ( 4 x − 2 y + 3 z )

8 0
3 years ago
Read 2 more answers
What is perimeter of 4 inch square
Kobotan [32]
4*4 is you answer just times 4*4

4 0
3 years ago
Read 2 more answers
the mantle layer of earth begins about 70 kilometers underneath the surface. The layer called the outer core begins about 2970 k
gavmur [86]
Given:
<span>mantle layer of earth begins about 70 kilometers underneath the surface
</span><span>outer core begins about 2970 kilometers underneath the surface

Since we need to find the position of each layer </span><span>relative to the surface, the surface will serve as the point of origin or 0. Below the surface infers a negative value. So, Mantle layer is -70 km from the surface while outer core is -2970 km under the surface.

Comparing -70 and -2970, -70 has a greater value than -2970. The nearer the number is to the origin or 0, the higher its value.

Comparing the absolute greater value of -70 and -2970, -2970 has a greater absolute value. This is because absolute value is the positive value of the number. Absolute value of -70 is 70 while absolute value of -2970 is 2970. Thus, -2970 has a greater absolute value. </span>
6 0
3 years ago
An office supply company is shipping a case of
SSSSS [86.1K]
Pencils and easers hope ya how
3 0
2 years ago
Other questions:
  • A large truck is going down a hill at 60 miles per hour. The driver needs to begin slowing down by shifting the gears. The speed
    10·1 answer
  • tom ate 1/4 of a pizza. He divided the leftover pizza into pieces each equal to 1/12 of the Original Pizza. After he gave some f
    9·1 answer
  • HELP CONGRUENT ANGLES
    8·1 answer
  • 90 Points!! PLEASE MAKE SURE THE INORMATION IS CORRECT THAT YOU GIVE ME!
    5·1 answer
  • The distance from town A to town B is divided into 8 equal parts. So far, a bus has traveled 12 Miles. How far apart are town A
    10·1 answer
  • 1. Find Cos 0 if Sin 0 = 0.7771 if 0 so&lt;<br> a. 0.6293<br> b. +0.6293<br> C. 0.3961<br> d. -03961
    7·1 answer
  • HELP 10 points !!!!!!!
    13·2 answers
  • What is the Lowest Common Multiple of 20 and 30?
    7·1 answer
  • Choose the model that shows the correct answer to this problem: <br> PLS ANSWER WILL GIVE BRAINIEST
    6·1 answer
  • What is the length of AB with endpoints A (-1,0) and B (4,-3)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!