Question

find the value of each if the following algebraic expressions: 3x-4y+9 if x=5 & y = -2​

Answer 1

Answer:

If x=5 and y = -2​ then 3x-4y+9 = 32

Step-by-step explanation:

If x=5 and y = -2​

Then

3x-4y+9

= 3(5) - 4(-2) + 9

= 15 + 8 + 9

= 23 + 9

= 32

So, if x=5 and y = -2​ then 3x-4y+9 = 32

Answer 2

Answer:

∴ The value of equation $3x-4y+9$ at $x=5$ and $y=-2$ is $32$.

Step-by-step explanation:

• In context to question asked,
• We have to find the value of algebraic expressions: $3x-4y+9$ if $x=5$ and $y=-2$.
• To find the value of given equation, we have to put $x=5$ and $y=-2$ in the given equation.
• So the given equation is,

         $3x-4y+9 = 3\times 5-4\times (-2)+9$

                         = $15+8+9$

                         = $32$

• ∴ The value of equation $3x-4y+9$ at $x=5$ and $y=-2$ is $32$.