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
Radda [10]
3 years ago
8

I NEED HELP ASAP I DONT UNDERSTAND THIS!!

Mathematics
1 answer:
zheka24 [161]3 years ago
3 0

Let the cost of the hair dryer equal x.

The net cost plus a 40% markup equals 42, set up an equation and solve forex.

1.4x = 42

Divide both sides by 1.4

X = 42 / 1.4

X = 30

The net cost was £30

You might be interested in
Two numbers with a product of 1, such as 3/4 and 4/3 are called reciprocals
evablogger [386]

Answer:

thanks for the points i mean really. anways hope someone else can help

8 0
2 years ago
Which of the following is the solution to 4 | X+3 8 ?
mylen [45]
C. XS-5 and x > -1 lol
5 0
3 years ago
What is the answers to this problem? Please help!!
Allushta [10]

Answer:

a = 31.7

c = 39.1

Step-by-step explanation:

tan54 = a / 23

a = 23 * tg54

a = 31.7

sin54 = 31.7 / c

c = 31.7 / sin54

c = 39.1

:)

5 0
3 years ago
A rectangular banner has a length that is two feet shorter than twice its height, ℎ. If the expression ℎ(2ℎ−2) represents the ar
densk [106]

Answer:

h = 6

Step-by-step explanation:

Given he area of the banner expressed as;

A =  ℎ(2ℎ−2)

h is the height of the banner

A is the area = 60

Substitute

60 =  ℎ(2ℎ−2)

60 = 2h² - 2h

30 = h² - h

h²-h-30 = 0

Factorize;

h²-6h+5h-30 = 0

h(h-6)+5(h-6) = 0

(h-6)(h+5) = 0

h - 6 = 0 and h+5 = 0

h = 6 and -5

Since the height cannot be negative;

h = 6

Hence he height of the banner is 6

3 0
3 years ago
Pigeon Hole Principle :
yaroslaw [1]

Answer:

A proof can be as follows:

Step-by-step explanation:

Let S=\{a_{1},a_{2},...,a_{n},a_{n+1}\} be a set of n+1 integers. By the division algorithm the possible remainders when we divide by n are 0,1,2,....,n-1. Then, each integer a_{i}\in S can be written as:

a_{i}=np_{i}+r_{i},\,\,0\leq r_{i}

Observe that the set of remainders \{r_{1},r_{2},...,r_{n+1}\} has n+1 elements and each element has n possible values. By the Pigenhole principle at least two remainders have the same value. Suppose that this two elements are a_{i}, a_{j}. Then,

\begin{array}{c}a_{i}=np_{i}+r\\a_{j}=np_{j}+r\end{array}

Where r_{i}=r_{j}=r. Then,  a_{i}-a_{j}=np_{i}-np_{i}=n(p_{i}-p_{j}). Then we have that n divides a_{i}-a_{j}.

5 0
3 years ago
Other questions:
  • How to do this equation by elimination 8x +14y= 4 and -6 + -7y =-10
    15·2 answers
  • Water coming out from a fountain is modeled by the function:
    5·2 answers
  • A radius of the base cone is 3cm and altitude is 9cm calculate the volume.​
    7·1 answer
  • 25x2 – 20x – 2 = -6
    8·1 answer
  • Please help!!! Trigonometry is so complicated to me
    7·1 answer
  • Write a ratio, in simplest form and a percent for the shaded area
    13·2 answers
  • Need help ASAP!! Thanks
    11·1 answer
  • Jacob distributed a survey to his fellow students asking them how many hours they'd spent playing sports in the past day. He als
    13·2 answers
  • Simplify a-c when a=5,c=-1​
    5·1 answer
  • Find any integer between<br>-3.92 and 12,4​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!