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stepladder [879]
3 years ago
8

If y varies inversely as x and y 27 when x 40 find y when x 10

Mathematics
1 answer:
Iteru [2.4K]3 years ago
3 0
When y varies inversely as x ⇒ y*x=k

y=27 and x=40 ⇒27*40=1080=k

y*10=1080
y=1080:10
y=108
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MATH HOMEWORK HELP PLEASE
mojhsa [17]

Answer:

b

Step-by-step explanation:

6 0
3 years ago
Perpendicular lines are two distinct coplanar lines that intersect to form what type of angle?
11111nata11111 [884]
<span>Perpendicular lines are two distinct coplanar lines that intersect to form what type of angle right angle </span>
3 0
3 years ago
Read 2 more answers
(-2x+3y=8....(i)<br>( x+y=2.........(ii)<br>solve by elumination method and substitution​
yan [13]

Answer:

 x = -2/5

 y = 12/5

Step-by-step explanation:

Substitution method;

-2x + 3y = 8  -----------(i)

x + y =2   -----------(ii)

x = 2 - y

substitute the value of x in equ (i)

  (-2)* (2-y) + 3y = 8

     -4 + 2y + 3y = 8

                   5y = 8 + 4

                     y = 12/5

substitute the value of y in equ (ii)

x + 12/5 = 2

        x = 2 - 12/5

           = 2*5/1*5 - 12/5  

          = 10 -12/5 = -2/5

Ans: x = -2/5

       y = 12/5

elimination method:

-2x + 3y = 8  -----------(i)

x + y =2   -----------(ii)

                                    (i)   ====>    -2x + 3y = 8

multiply equ (ii) by 2         ====>    <u>  2x + 2y = 4</u>

             add (i) and (ii)                             5y = 12

                                                                   y = 12/5

Substitute in equ (ii)

x + 12/5 = 2

        x = 2 - 12/5

           = 2*5/1*5 - 12/5  

          = 10 -12/5 = -2/5

Ans: x = -2/5

       y = 12/5

                                                       

               

5 0
3 years ago
Read 2 more answers
a country's population in 1990 was 134 million. in 2000 it was a 139 million. estimate the population in 2014 using the exponent
yuradex [85]
F=ir^t

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r=(139/134)^(1/10) then:

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Some will say that you have to use the exponential function, but it really gives you the same answer...even for continuous compounding :)...

A=Pe^(kt)

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139/134=e^(10k)

ln(139/134)=10k

k=ln(139/134)/10 so

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A=134e^(2.4*ln(139/134))

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The only real reason or advantage to using A=Pe^(kt) is when you start getting into differential equations...
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nikklg [1K]

Answer:

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8 0
3 years ago
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