Approximate the real zeros of f(x) = x2 + 3x + 1 to the nearest tenth.

2.6,-,0.4

Step-by-step explanation:

f(x)=x²+3x+1

using a graph tool

see the attached figure

the solutions are

x=-2.618

x=-0.382

the answer is

2.6 ,-,0.4

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x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18