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neonofarm [45]
3 years ago
12

Assume that y varies directly with x, then solve.

Mathematics
2 answers:
Tatiana [17]3 years ago
7 0

Answer:

-4.4

Step-by-step explanation:

x : y

9.9 : -6.6

6.6 : y

9.9/-6.6 = 6.6/y

y = 6.6 × -6.6/9.9

y = -4.4

andrew-mc [135]3 years ago
3 0

Answer:

y = - 4.4

Step-by-step explanation:

from the question

y = -6.6

x = 9.9

y∝ x

y = kx ..... where k is introduced as a constant of proportionality

solve for k

y=-6.6 and x = 9.9

we have,

-6.6 = k × 9.9

-6.6 = 9.9k

divide both sides by 9.9

-6.6/ 9.9 = 9.9k/9.9

-0.667= k

therefore k = - 0.667

now, find y when x = 6.6

from the equation y = kx

y = -0.667 × 6.6

y = - 4.4

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Answer:

TRUE

Step-by-step explanation:

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3 years ago
What is the volume of this cylinder? (Round to the nearest inch ) 7( radius)
Agata [3.3K]

Answer:

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When the values are plugged in, you would have:

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Then simplified....

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and when rounded to the nearest inch...

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4 0
3 years ago
The points (1,-10) and (r,2) fall on a line with a slope of 2 what is the value of r.
zalisa [80]

The value of r in the given coordinates with their slope is; r = 7

How to find the Slope of a Line?

The formula for slope of a line passing through 2 points is;

m = (y2 - y1)/(x2 - x1)

We are given the coordinates as;

(1,-10) and (r,2)

The slope of the line passing through this coordinates is 2. Thus;

(2 + 10)/(r - 1) = 2

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3 0
1 year ago
Tabitha decided to start saving pennies for a stretch of two months and initially started with 2 pennies. A table showing the nu
svetoff [14.1K]

Answer:

  • after week 7: 4374 pennies
  • 486 pennies: after week 5

Step-by-step explanation:

The sequence values have a first term of 6 and a common ratio of 3, so can be described by the formula ...

  an = 6·3^(n-1)

This can be rearranged to ...

  an = 2·3^n

__

When n=7, the value is ...

  a7 = 2·3^7 = 4374 . . . . pennies saved after 7 weeks

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To find when there are 486 pennies saved, we can solve the equation ...

  486 = 2·3^n

  243 = 3^n

  log(243) = n·log(3) . . . . . . . take the logarithm

  log(243)/log(3) = n = 5 . . . . divide by the coefficient of n

Tabitha will have saved 486 pennies after 5 weeks.

7 0
3 years ago
There are 92 students on the bus. 43 are girls and the rest are boys. At the stop along route, half of the students exit the bus
ludmilkaskok [199]
92 students were on the bus and half left
so thats 92/2 and you get 46
46 students were left on the bus

Hope this helps! :))
6 0
3 years ago
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