Answer:
Option C is correct.
roots of the given equation , 
Step-by-step explanation:
Given the equation: 
We can write this equation as:
A quadratic equation is in the form of 
......[1] where a,b ,c are the coefficient and x is the variable,
the solution of the equation is given by;
On comparing given equation with equation [1] we get;
a = 3 , b = -4 and c =10
So, the solution of the given equation is given by;
or
or
[∴
Simplify:
therefore, the roots of the given equation are;
Answer:
its d
Step-by-step explanation:
Answer: 31.792.5 cu. ft. (<u>choice B</u>)
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Work Shown:
The result is approximate since 
is approximate.
Answer:
z = 21 ; y= 16
Step-by-step explanation:
first of all we have to isolate a variable.
In second expression we can obtain:
3y = 2z+6
y = 2/3 z + 2
now we have to substitute this value in the first equation and solve it
8(2/3z+2)-5z = 23
16/3z + 16 -5z = 23
16z +48 - 15z = 69
z = 21
now we have to substitute z in the second equation:
y = 2/3 (21) +2
y = 14+ 2 = 16
y = 16
