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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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The perimeter of a rectangle is 63cm. The length is 4cm more than its width. Find the dimensions of the rectangle
amm1812

O=63cm

a=b+4

O=2a+2b

O=2(b+4)+2b

O=2b+8+2b

63=4b+8

4b=63-8

4b=55

b=55/4=13.75

a=13.75+4=17.75

6 0
3 years ago
The record high temperature in January was 18 degrees. The record low temperature was –7 degrees. What is the amount of change b
vodka [1.7K]

Answer: 25^{\circ}

Step-by-step explanation:

Given

The highest temperature recorded is 18^{\circ}

The lowest temperature recorded is -7^{\circ}

The amount of change between the high and the low temperatures is

\Rightarrow 18-(-7)=18+7\\\Rightarrow 25^{\circ}

6 0
3 years ago
What is it plssss???
erastovalidia [21]

Answer:

First option, 4 because 1/6 + 1/6 + 1/6 +1/6 = 4/6

6 0
3 years ago
An inlet pipe can fill an empty swimming pool in 5 hours, and another inlet pipe can fill the pool in 2 hours. How long will it
stich3 [128]

Answer:

1.42 hours

Step-by-step explanation:

In this case we must take into account that the speed would be to fill a pool for a time, that this case is in hours, therefore it would be like this:

1/5 for the first pipe

1/2 for the second pipe

Now, we will use both at the same time, therefore:

1/5 + 1/2 = 1 / x

0.7 = 1 / x

x = 1 / 0.7

x = 1.42

That is to say that if we use both we will take a total of 1.42 hours

3 0
3 years ago
What is the radius of a circle whose equation is X^2 plus Y^2 -10X +6 X +18=0?
frosja888 [35]

ANSWER

The radius is 4

EXPLANATION

The given equation is:

{x}^{2}  +  {y}^{2}  - 10y + 6x + 18 = 0

We complete the square to get the expression in standard form:

{x}^{2}  + 6x +  {y}^{2}  - 10y  + 18 = 0

{x}^{2}  + 6x +  9 + {y}^{2}  - 10y  + 25  =  - 18 + 9 + 25

We factor using perfect squares to get:

{(x + 3)}^{2}  +  {(y - 5)}^{2} =  16

This implies that,

{(x + 3)}^{2}  +  {(y - 5)}^{2} =   {4}^{2}

Comparing to

{(x  - h)}^{2}  +  {(y - k)}^{2} =   {r}^{2}

The radius is r=4

3 0
3 years ago
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