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Chapter 3: Q57. (page 135)

Evaluate each expression if x=-2,y=6,and z=5.

57.x+y+z.

Short Answer

Expert verified

The value of x+y+z is 9.

Step by step solution

01

– Use the substitution method to find the value of x+y+z.

Substitutex=鈭�2,y=6 andz=5 in .x+y+z

x+y+z=(鈭�2)+6+5

02

– By applying the order of operations simplify the value of x+y+z.

x+y+z=(鈭�2)+6+5=鈭�2+6+5鈥夆赌夆赌夆赌夆赌夆赌塖颈尘辫濒颈蹿测迟丑别辫补谤补苍迟丑别蝉颈蝉=4+5鈥夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌塂辞迟丑别蝉耻产迟谤补肠迟颈辞苍=9鈥夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌塂辞迟丑别补诲诲颈迟颈辞苍

03

– Conclusion

By substituting the values x=-2,y=6and z=5 in x+y+z, the value of the expression is 9.

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