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Naily [24]
2 years ago
9

What is the constant of proportionality?

Mathematics
1 answer:
inessss [21]2 years ago
5 0

The constant of proportionality is the ratio between two directly proportional quantities. Two quantities are directly proportional when they increase and decrease at the same ratetion:

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Divide 85 into the ratio of 2:3:5
alukav5142 [94]
The actual amount that needs to be divided = 85
The ratio in which the amount needs to be divided = 2:3:5
Let us assume the common ratio to be = x
Then
2x + 3x + 5x = 85
10x = 85
x = 85/10
  = 8.5
Then
The ratio in which the number 85 will be divided = 2 * 8.5:3 * 8.5:5 * 8.5
                                                                             = 17:25.5:42.5
So from the above deduction we can see that the number 85 can be divided in the ratio 17:25.5:42.5
4 0
3 years ago
Write y=-3x^2+12x-21 in vertex form
riadik2000 [5.3K]
Complete the square: 
<span>y = 3x^2 - 12x + 4 </span>
<span>y = 3(x^2 - 4x) + 4 </span>
<span>y = 3(x^2 - 4x + 4 - 4) + 4 </span>
<span>y = 3(x^2 - 4x + 4) - 12 + 4 </span>
<span>y = 3(x - 2)^2 - 8</span>
5 0
3 years ago
Read 2 more answers
Can someone please give me the (Answers) to this? ... please ...
Korvikt [17]

Answer:

6:A

7;B

8;c

9;A

10:c

11;b

12:A

3 0
2 years ago
Read 2 more answers
If f(x)=1/7-9, then f^-1(x)=
artcher [175]

Answer:

Step-by-step explanation:

Hello!

f(x)=\frac{1}{7} -9=\frac{1-9*7}{7} =-\frac{62}{7} \\=>f^{-1} (x)=-\frac{7}{62}\\

Good luck!

4 0
3 years ago
A car travels at an average speed of 90 km per hour.
lys-0071 [83]

9514 1404 393

Answer:

  270 km

Step-by-step explanation:

Distance is related to speed and time by ...

  distance = speed · time

  distance = (90 km/h)(3 h) = 270 km

The car will travel 270 km in 3 hours.

8 0
2 years ago
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