4x + 1 = -3
"The product" is the term used to describe the answer of a multiplication equation.
"increased by" means you're adding.
"a number" refers to a variable.
        
             
        
        
        
9514 1404 393
Answer:
   a.  (-1/2, 5)
Step-by-step explanation:
The coefficients of x have opposite signs, so the x-terms can be eliminated by adding the two equations.
   (2y -12x) +(3y +12x) = (16) +(9)
   5y = 25 . . . . . . simplify
   y = 5 . . . . . . . . .divide by 5
This matches only answer choice A.
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<em>Check</em>
The other part of answer choice A is x = -1/2. We can test this to make sure it works:
   2(5) -12(-1/2) = 16
   10 + 6 = 16 . . . . . . true, the selected answer works OK
 
        
             
        
        
        
Answer:
44
Step-by-step explanation:
delta math
 
        
             
        
        
        
Answer:
see explanation
Step-by-step explanation:
Given
 x +
x +  y +
y +  z = π
 z = π
let
 x = A ,
x = A ,  y = B ,
y = B ,  z = C , so
z = C , so
x = tanA, y = tanB , z = tanC
Substituting values
A + B + C = π  ( subtract C from both sides )
A + B = π - C ( take tan of both sides )
tan(A + B) = tan(π - C) = - tanC ( expand left side using addition identity for tan )
 = - tanC ( multiply both sides by 1 - tanAtanB )
 = - tanC ( multiply both sides by 1 - tanAtanB )
tanA + tanB = - tanC( 1 - tanAtanB) ← distribute
tanA+ tanB = - tanC + tanAtanBtanC ( add tanC to both sides )
tanA + tanB + tanC = tanAtanBtanC , that is
x + y + z = xyz