Question

find the value of each if the following algebraic expressions: ab-3b+7c where a=5,b=7 and
c=4​

Answer 1

27

ab - 3b + 7c

5 * 4 - 3 * 7 + 7 * 4

20 - 21 + 28 = 27

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Answer 2

Answer:

∴  The value of algebraic expressions: $ab-3b+7c$ where $a=5, b=7$ and $c=4$ is $42$.

Step-by-step explanation:

• In context with question asked,  
• We have to find the value of algebraic expressions: $ab-3b+7c$ where $a=5, b=7$ and $c=4$.
• To find the value of given equation, we have to put $a=5, b=7$ and $c=4$ in the given equation.
• So the given equation is,

 $ab-3b+7c = 5\times 7-3\times 7+7\times 4$

                 = $35-21+28$

                 = $42$

• ∴  The value of algebraic expressions: $ab-3b+7c$ where $a=5, b=7$ and $c=4$ is $42$.