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mojhsa [17]
2 years ago
13

Solve the equation. Check the solution. g+4/g-2 = g-5/g-8

Mathematics
2 answers:
kari74 [83]2 years ago
3 0
(g + 4)/(g - 2) = (g - 5)/(g - 8)
cross multiply
(g + 4)(g - 8) = (g - 5)(g - 2)
expand
g^2 - 4g - 32 = g^2 - 7g + 10
- g^2
-4g - 32 = -7g + 10
+ 7g
3g - 32 = 10
+ 32
3g = 42
÷ 3
g = 14

I hope this helps!
Maslowich2 years ago
3 0

Answer:

Option (d) is correct.

g = 14

Step-by-step explanation:

Given: \frac{g+4}{g-2} =\frac{g-5}{g-8}  

We have to solve for g.

Consider the given expression \frac{g+4}{g-2} =\frac{g-5}{g-8}  

Apply cross multiply rule,

if\:}\frac{a}{b}=\frac{c}{d}\mathrm{\:then\:}a\cdot \:d=b\cdot \:c

We have

\left(g+4\right)\left(g-8\right)=\left(g-2\right)\left(g-5\right)

Apply distributive rule,

\left(a+b\right)\left(c+d\right)=ac+ad+bc+bd

\left(g+4\right)\left(g-8\right)=gg+g\left(-8\right)+4g+4\left(-8\right)

Simplify, we get,

\left(g+4\right)\left(g-8\right)=g^2-4g-32

Similarly, \left(g-2\right)\left(g-5\right)=g^2-7g+10

Substitute back, we have,

g^2-4g-32=g^2-7g+10

Simplify, we have,

g^2-4g=g^2-7g+42

Further simplification give, 3g=42

Divide both side by 3,

We have g = 14

Thus, Option (d) is correct.

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An electronics store makes a profit of $72 for every television sold and $90 for every computer sold. The manager’s target is to
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the complete question in the attached figure

 

we have 

$72 ------------------------------------ > for every television sold

$90 ------------------------------------ > for every computer sold.

let 

x--------------------- > numbers of television sold

y--------------------- > numbers of computer sold 

then 

72x+90y >= $360 ----------- >72x/72+90y/72 >= $360 /72---- >x+1.25y >= $5

y >= (5-x)/1.25--------------see the graph in attached figure 

 

case A---------- > (5,2) (3,3)  (1,4)

72x+90y --------- > 72*5+90*2=540 >= 360----- > is solution

72x+90y --------- > 72*3+90*3=486 >= 360----- > is solution

72x+90y --------- > 72*1+90*4=432 >= 360----- > is solution

 

case B------------ >  (4,0) (2,2)  (1,1)

72x+90y --------- > 72*4+90*0=288 < 360----- > is not solution

72x+90y --------- > 72*2+90*2=324 < 360----- > is not solution

72x+90y --------- > 72*1+90*1=162 < 360----- > is not solution

 

case C------------ >  (3,1) (2,2)  (1,0)

72x+90y --------- > 72*3+90*1=306 < 360----- > is not solution

72x+90y --------- > 72*2+90*2=324 < 360----- > is not solution

72x+90y --------- > 72*1+90*0=72 < 360----- > is not solution

 

case D------------ >  (4,0) (3,3)  (1,4)

72x+90y --------- > 72*4+90*0=288 < 360----- > is not solution

72x+90y --------- > 72*3+90*3=486 >= 360----- > is solution

72x+90y --------- > 72*1+90*4=432 >= 360----- > is solution

 

<span>the answer is case A </span>



4 0
3 years ago
Read 2 more answers
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