if a =1 + r + 7r and b = 1 -r ,find an expression that equals A+ 3B in standard form. Answer:
Mathematics · High School · Tue Nov 03 2020
llm
Answered on
Given:
a = 1 + r + 7r
b = 1 - r
Find the expression that is equals to A + 3B in standard form.
Solution:
In order to determine the numerical expression equal to A + 3B, we equate or substitute the n given values of A and B in the equation.
= A + 3B
= (1 + r + 7r) + 3(1 - r)
= 1 + r + 7r + 3 - 3r
Combine similar terms.
= 4 + 5r
Final answer:
= 4 + 5r