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devlian [24]
2 years ago
8

Y is inversely proportional to 7I+x.When x = 8, y = 2.Find y when x= 15.​

Mathematics
1 answer:
const2013 [10]2 years ago
6 0

I am taking 7I+x to  mean 71+ x.

Answer:  y=1.837

Step-by-step explanation:

Step 1

Let y is inversely proportional to 7I+x be  mathematically be written as

y ∝ 1/7I+x

Introducing our proportionality of constant , K we have that

y ∝ 1/7I+x

y =K 1/7I+x

y= K/ 7I+xh

Step 2

so when x= 8, and y =2,  k becomes

y= K/ 7I+x

k=  y x (7I+x)

=2 x (71 + 8)

2x 79

=158

 when x= 15, y =?

y= K/ 7I+x

y= 158/  71 + 15

y=158/86

y=1.837

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podryga [215]
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Let the inside dimension of the length of the frame = a
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The total width of the frame = 2b

The total amount of the frame in feet is (2a + 4x + 2b)*y = Cost
If this is incorrect please leave a message on my home page.
6 0
3 years ago
Anyone who could do these 8 listed questions I will give a generous amount of points. Please make sure to list all the angles th
k0ka [10]

Answer:

1) 0, 180

2) 90

3) 3pi/2

4) pi/2, -3pi/2

5) 90, 270

6) 0

7) pi

8) -2pi, 0, 2pi

Step-by-step explanation:

1) sinx = 0

x = 0, 180, 360

2) sinx = 1

x = 90

3) sinx = -1

x = 270 or 3pi/2

4) sinx = 1

x = pi/2, pi/2 - 2pi = -3pi/2

5) cosx = 0

x = 90, 360

6) cosx = 1

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7) cosx = -1

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8) cosx = 1

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5 0
3 years ago
Graph the compound inequality on the number line.
taurus [48]

Answer:

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Step-by-step explanation:

7 0
2 years ago
There're some old video games you sell on Ebay for $6, $7 and $9. The titles include " The Pirates", "Under the sea" and "The dr
Semenov [28]

Answer:

2/9

Step-by-step explanation:

lets create a sample space

so

the pirates can be sold for $7 $6 or $9

        p

6       7      9

under the sea can be sold for $6 $7 or $9

                              S

                        6,  7,  9

driving test can be sold for $6 $7 or $9

                            D

                   6, 7, 9

here are all the combinations:

p,6

p,7

p,9

s,6

s,7

s,9

d,6

d,7

d,9

since out of 9 combinations driving test is the only one that is not water related lets look at that. There are only 2 combinations of driving test which are less than or equal to $7, (d,7 and d,6) hence the probability of selling no water games for  less than $7 is 2/9

3 0
3 years ago
Read 2 more answers
Please help me asap due at 5:00
algol [13]

Answer:

11/18.

Dan is 8.

Step-by-step explanation:

The initial fraction is

x / 2x-4

Adding 3/3 we have

x+3 / 2x-1 = 2/3

Cross multiply:

3(x+3) = 2(2x-1)

3x + 9 = 4x - 2

9 + 2 = 4x - 3x

11 = x,

So the original fraction was 11 / 2(11) - 4

= 11/18.

If Dans age is d then Lois's age = 4d.

So 4d + d  = 40

5d = 40

d = 8.

So Dan is 8 years old.

5 0
1 year ago
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