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
Anuta_ua [19.1K]
3 years ago
15

Kelsey is putting on sunscreen. She uses 3 ml to cover 45cm to the power of 2 of her skin. She want to know how many milliliters

of sunscreen (g) she needs to cover 240cm to the power of 2 of her skin. She assumes the the relationship between milliliters of sunscreen and the area is proportional.
How many milliliters of sunscreen does Kelsey need to cover 240cm to the power of 2 of her skin?
Mathematics
1 answer:
Artemon [7]3 years ago
4 0

Answer: She would require 16 ml cover 240cm^2 of her skin

Step-by-step explanation:

Let m represent the milliliters of sunscreen required to cover her skin.

Let a represent the area of her skin that was covered. She assumes the the relationship between milliliters of sunscreen and the area is proportional. Introducing the constant of variation, k, the expression becomes

m = ka

She uses 3 ml to cover 45cm^2 of her skin. Therefore,

3 = k × 45

k = 3/45 = 1/15

The expression becomes

m = a/15

The milliliters of sunscreen that Kelsey needs to cover 240cm to the power of 2 of her skin would be

m = 240/15

m = 16 ml

You might be interested in
Three fifths of the members of a hiking club went on the last hiking trip. If 39 people went on the trip , how many are in the c
finlep [7]

Step-by-step explanation:

1. Since 39 is 3/5 of the club, divide by 3 to get 1/5 of the club

2. 1/5 of the club is 13 people

3. Multiply 13 by 5 to get 5/5 of the club (which is the whole club)

4. The whole club is 65 people

5. You can check it because 65×3/5=39

4 0
3 years ago
Each student in a class plays one of three sports soccer, volleyball or basketball. 1/4 of them play soccer. 3/5 of them play vo
Setler79 [48]

Answer: 3/20 of the class

Step-by-step explanation:

Add the amount of students that play soccer to amount of students that play volleyball

1/4 + 3/5 = 17/20

Subtract 17/20 (soccer and volley ball) from 20/20 or 1

20/20 - 17/20 = 3/20

7 0
3 years ago
Which expressions are equivalent to ? Check all that apply.
GrogVix [38]

Answer:

6.2+8.7+8.9x

Step-by-step explanation:

For expressions to be equivalent, they must simplify to the same lowest form. 8.9x+6.2+8.7 simplifies to 8.9x +14.9.

Each of the expressions below must simplify to 8.9x + 14.9 to be equivalent.

9x+6+9  = 9x + 15 NO

3.9+6.2+8.7x  = 8.7x + 10.1 NO

3.7+8.9+6.2  = 18.8 NO

6.2+8.7+8.9  = 23.8 NO

6.2+8.7+8.9x  = 8.9x + 14.9 YES

3.9+6.2x+8.7  = 6.2x + 12.6 NO

3.9x+8.7+6.2 = 3.9x + 14.9 NO

8 0
3 years ago
Read 2 more answers
Please answer questions 1 and/or 2, thnx
bixtya [17]
55.79 = 0.99<em>d + </em>39.95

55.79 - 39.95 = 15.84

0.99d = 15.84

0.99d/0.99 = 15.84/0.99

d = 16

2) Equation = 12.6 million = 4(x) + 1 million
12.6 million - 1 million = 11.6 million
11.6 million/4 = x
x = 2900000

hope this helps
7 0
3 years ago
Read 2 more answers
What’s the answer??????? Pleaseeeeeeee helppppppppppp
Vinvika [58]

Hello from MrBillDoesMath!

Answer:

Choice A,   18x - 6y = 20


Discussion:

Given line  

-9x + 3y = 12     (M)


Choice A:

18x - 6y = 20  =>          divide both sides by -2

-9x + 3y = -10     (N)


The left hand sides of (M) and (N) are equal implying that right hand sides are equal which further implies 12 = -10.  Contradiction! so the system M and N has no solution.


Thank you,

MrB

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following number has terminating has terminating decimal expansion ?
    13·1 answer
  • Can someone explain to me how to solve this equation<br>15x +-6 = 8​
    10·2 answers
  • Write 24.652 as a mixed number.
    6·1 answer
  • andrew owns a bookshop and is trying to sell his old stock of books to reduce his inventory. he decides to price the books so th
    13·1 answer
  • Write a multipication expression that shows <br><img src="https://tex.z-dn.net/?f=%20%7B10%7D%5E%7B5%7D%20" id="TexFormula1" tit
    10·1 answer
  • If sarah is 24 years younger than her mother and if the sum of their ages is 68 how old is sarah
    13·2 answers
  • What is the value of x in the inequality 7x-26&gt;=3(3x-2)
    9·1 answer
  • Write the equation of a line through the point (4,2) and with a slope of 1/2
    11·1 answer
  • Please help with this
    12·1 answer
  • Arielle has a collection of grasshoppers and crickets. She has 561 insects in all. The number of grasshoppers is twice the numbe
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!