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pav-90 [236]
3 years ago
15

Help Please please & show ur work which expression is equivalent to (-15.5)divid sign (-0.5)(1.5) ? A (-31)(1.5) B (-7.75)(1

.5) C (7.75)(1.5) D(31)(1.5)
Mathematics
1 answer:
Dafna11 [192]3 years ago
6 0
(-15.5 / (-0.5) = 31

8 1.5  = (31)(1.5)

Answer is D
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Ok , with that information we can write the equations
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Through elimination , we can set one of the variables in both equations equal so we can eliminate it :

(4)x + (4)y = (4)6
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4x + 4y = 24. equation 1
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Now we can subtract the second equation by the first equation and isolate one variable:
equation 2 - equation 1

5x - 4x + 4y - 4y = 28 - 24

x = 4

Now that we discovered our x value ( How many people ordered chicken salad ) , we can apply it to one of the equations and discover y ( how many people ordered egg salad)

x + y = 6
x= 4
4 + y = 6

We can shift 4 to the other side of the equation by subtracting 4 from both sides of the equation:
4 - 4 + y = 6 - 4
y = 2

x=4 and y=2

So the awnser is :
4 people ordered chicken salad and 2 people ordered egg salad!

I hope you understood my brief explanation!!

p.s if you want to know how to use another method to solve these problems ( Substition) , just let me know in a comentary down here
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