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BartSMP [9]
2 years ago
7

If y varies inversely to x and y=9 when x=-6 find x when y=3

Mathematics
2 answers:
Minchanka [31]2 years ago
8 0

Answer: y =21

Step-by-step explanati

aksik [14]2 years ago
5 0

Answer:

4.5

Step-by-step explanation:

we have to do  Unitary method.

when y=9 then x=6

when y=1 the x=9/6

when y=3 then x=(9*3)/6

x=4.5

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The length of the hypotenuse of a right angled triangle exceeds the length of the base by 2cm and exceeds twice the length of th
insens350 [35]

Answer: a = 8;  b = 15;  c = 17

Step-by-step explanation:

c = b + 2  and c = 2a + 1

b = c − 2 and a =  \frac{c-1}{2}

​

c² = b² + a²  

c^{2} = (c-2)^{2} + \frac{c-1}{2}\\

c^{2}= \frac{4 (c-2)^{2}+(c - 1)^{2}  }{4}

4c^{2}={4 (c^{2} + 4 -4c)+c ^{2}  + 1-2c

4c^{2}={4 c^{2} + 16 -16c)+c ^{2}  + 1-2c

c^{2}-18c+17=0

c(c -17)-1(c-17)=0

​(c -1)(c-17)=0

c = 1 or c = 17

If c = 1 then b = 1 - 2 = -1, that's not possible

So x = 17

b = 17 - 2 = 15

a = \frac{17-1}{2}  = 8

Length sides of the triangle are 17 cm, 15 cm and 8 cm.

I saw some of this on a site but I want to make sure its correct so we're gonna apply the pythagorean theory and see if its correct.

a^{2} + b^{2} = c^{2} \\8^{2} + 15^{2} = 17^{2} \\64 + 225 = 289\\289 = 289\\

This shows that this is correct.

Hope this helped! Again, some of this was from a site, not from me.

3 0
2 years ago
The volume of 10
Alona [7]
Hello!

1 floz divided by 100 = 0.01
0.01 x 10 = 0.1 floz for 10 drops. 
8 0
3 years ago
Read 2 more answers
Drex's and Max's ages add up to 29.Seven years ago Drex was twice as old as Max. Find their present ages​
nexus9112 [7]

Answer:

There present ages are

Drex age = 17 years

Max age  =  12 years

Step-by-step explanation:

Given as ,

The sum of age of Drex and Max = 29 years

And seven years ago Drex was twice as old as max

So , Let the Age of Drex = D   and Max age = M

I.e (D - 7 ) = 2 (M - 7)

Or, D - 7 = 2M - 14

Or, 2M - D = 7

And Also D + M = 29  

So , from both equations

(2M - D ) + (D + M) = 29 +7

Or,  3M = 36

I.e M = \frac{36}{3} = 12 years

∴ The Age of Drex = 29 - M

  The Age of Drex = 29 - 12 = 17 years

Hence there present ages are

The Age of Drex = 17 years

The Age of Max = 12 years     Answer

6 0
3 years ago
Martin is painting the shed shown. The shed is shaped like a cube. He wants to paint the outside walls of the shed using paint t
laila [671]

Answer:

13

Step-by-step explanation:

7 0
3 years ago
Find an explicit rule for the nth term of a geometric sequence where the second and fifth terms are -6 and 162, respectively.
Step2247 [10]
Hello,

a(2)=-6
a(3)=-6*r
a(4)=-6*r²
a(5)=-6*r^3=162
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a(1)=-6/(-3)=2
a(2)=2*(-3)
a(3)=2*(-3)²
a(4)=2*(-3)^3
a(5)=2*(-3)^4

a(n)=2*(-3)^(n-1)




Answer
5 0
2 years ago
Read 2 more answers
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