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GREYUIT [131]
3 years ago
15

A certain shade of pink us created by adding 3 cups of red paint to 7 cups of white paint

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
4 0

Answer:

A certain shade of pink us created by adding 3 cups of red paint to 7 cups of white paint

Step-by-step explanation:

Constant of proportionality is the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality.

To make color pink,

for every 3 cups of red , we need 7 cups of white.

Let 'r' be the cups of red required

let 'w' be the cups of white required

so , as per the question

for 3 r we need = 7 w

r = 7/3 w

so, 7/3 is constant of proportionality

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A phone company offers two monthly plans. Plan A costs $23 plus an additional $0.12 for each minute of calls. Plan B costs $18 p
Alona [7]

Answer:

250 minutes of calling will cost same using both plans.

$53

Step-by-step explanation:

Please consider the complete question.

A phone company offers two monthly plans. Plan A costs $23 plus an additional $0.12 for each minute of calls. Plan B costs $18 plus an additional $0.14 of each minute of calls.  For what amount of calling do the two plans cost the same?  What is the cost when the two plans cost the same?

Let x represent the number of call minutes.

The total cost of calling for x minutes using plan A would be cost of x minutes plus fixed charge that is 0.12x+23.

The total cost of calling for x minutes using plan B would be cost of x minutes plus fixed charge that is 0.14x+18.

To find the number of minutes for which both plans will have same cost, we will equate total cost of x minutes for both plans and solve for x.

0.14x+18=0.12x+23

0.14x-0.12x+18=0.12x-0.12x+23

0.02x+18=23

0.02x+18-18=23-18

0.02x=5

\frac{0.02x}{0.02}=\frac{5}{0.02}

x=250

Therefore, calling for 250 minutes will cost same using both plans.

Upon substituting x=250 in expression 0.14x+18, we will get:

0.14(250)+18=35+18=53

Therefore, the cost will be $53, when the two plans cost the same.

5 0
2 years ago
When you flip a biased coin the probability of getting a tail is 0.4. How many times would you expect to get tails if you flip t
olya-2409 [2.1K]

Answer:

50 im not 100% sure tho

Step-by-step explanation:

6 0
2 years ago
4. Determine the following difference. (2x² + 3x - 10) - (x² - x + 111)  please explain
SIZIF [17.4K]
Hi there! The answer is A.

(2x² + 3x - 10) - (x² - x + 111) 
Let's solve this problem step by step!

First work out the parenthesis. Because we multiply by negative 1, we mustn't forget to change the symbols in front of the factors.
2x² + 3x - 10 - x² + x - 111

Now rearrange our expression, in order to collect the terms later.
2x² - x² + x + 3x - 10 - 111

And finally collect the terms.
x² + 4x -121

The answer is A.
~ Hope this helps you!
8 0
3 years ago
Read 2 more answers
Sovle the question l-9l + l-1l ​
Arada [10]

Answer:

10

Step-by-step explanation:

| | means absolute value. Absolute value is always positive, so your equation would be evaluated to 9 + 1 = 10

7 0
3 years ago
Read 2 more answers
Please help :)! the pic gives you everything you need!
velikii [3]

Answer:

use Socratic

Step-by-step explanation:

it's a app

8 0
3 years ago
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