Substitute and simplify, X= 2, y = 9, z = -5
1. x + y + z = 6
2. 8x + 3 =
3. 4y + 3x2 =
4. xyz + 10 =
5. 2(y + 2) =

35-60 students are taking math.

21

jk it's 20

step-by-step explanation:

v,jhvljh,b.b; hk; ljujb,vuvccklokll; k,m,km,

step-by-step explanation:

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629