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8090 [49]
3 years ago
8

Evaluate this expression for x=2 and y=5.

Mathematics
1 answer:
bija089 [108]3 years ago
8 0

Answer:

B

Step-by-step explanation:

Substitute the given values for x and y into the expression

\frac{20}{5} - \frac{8}{2} + \frac{3(2)(5)}{2+5}

= 4 - 4 + \frac{30}{7}

= 0 + \frac{30}{7}

= \frac{30}{7} = 4 \frac{2}{7}

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<span> |2x − 5| − 2 = 3
</span><span>1) |2x − 5|  = 3 +2
2)</span><span> |2x − 5| = 5  
3) 2x-5 = 5, or 2x-5= -5
4)2x=10, or 2x=0
5) x = 5 , or x = 0

Check:
</span> |2x − 5| − 2 = 3
 |2*5− 5| − 2 = 3 or  |2*0 − 5| − 2 = 3
|5|-2=3               or   |-5| -2 =3
3=3 (true)           or    3=3 (true)

All steps are correct.

     
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