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romanna [79]
3 years ago
15

Answer but no links. quickly please

Mathematics
1 answer:
kari74 [83]3 years ago
7 0

Answer:

1. 18

2.3 and 3/4

3.6 and 1/4

Step-by-step explanation:

3 by 6 equals 18 since 12 divided by 2 is 6

15 divided upon 4 is 3.75 or 3 3/4

50 divided by 8 equals 6.25 or 6 1/4

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Find the constant of variation k for the inverse variation. Then write an equation for the inverse variation.
777dan777 [17]

Answer: 3) k = 22.5; xy = 22.5

Step-by-step explanation:

If two variables are inversely proportional, it means that an increase in the value of one variable would cause a corresponding decrease in the other variable. Also, a decrease in the value of one variable would cause a corresponding increase in the other variable.

Given that y varies directly with x, if we introduce a constant of proportionality, k, the expression becomes

y = k/x

If y = 2.5 when x = 9, then

2.5 = k/9

k = 9 × 2.5 = 22.5

Therefore, an equation for the inverse variation is

y = 22.5/x

xy = 22.5

4 0
3 years ago
Which equation is the equation of the line, in point-slope form, that has a slope of -1.8 and passes through the point (-0.5, 1.
pishuonlain [190]
Slope=-1.8, X=-0.5, y=1.9
Equation is y^2-y^1=m(x^2-x^1).
Y-1.9=-1.8(X-(-0.5))
Y-1.9=-1.8x+0.90
Add 1.9 on both sides.
Y= -1.8x+1.
I hope this helps you.
7 0
3 years ago
Read 2 more answers
81 of 270 pages in a book
Thepotemich [5.8K]

Answer: 3.14159 pie

Step-by-step explanation:

no the actual answer just being goofy

3 0
3 years ago
A city has 3 new houses for every 7 old houses. If there are 27 new houses in the city, how many old houses are there?
PtichkaEL [24]

Answer:

C. 63

Step-by-step explanation:

27/3= 9

9 TIMES 7 IS 63.

4 0
3 years ago
Read 2 more answers
These tables represent a quadratic function with a vertex at (0,3). What is the average rate of change for the interval from X =
Eva8 [605]

Answer:

-19

Step-by-step explanation:

The missing table is shown in the attachment.

Since the quadratic function has vertex at (0,3), its equation is of the form;

y = a {x}^{2}  + 3

To find the value of 'a' we substitute any other point from the table say (1,2) to get:

2 = a( {1)}^{2}  + 3

a = 2 - 3 =  - 1

Hence the function is

y =  -  {x}^{2} +  3

Now

f(10) =  - 100 + 3 =  - 97

f(9) =  - 81 + 3 =  - 78

The average rate of change from x=9 to x=10 is

\frac{f(10) - f(9)}{10 - 9}  =  \frac{ - 97 -  - 78}{1}  =   - 19

7 0
4 years ago
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