Question

For the simultaneous equations 7a+ 4b=13; 4a+7b=9, what is the value of a + b?​

Answer 1

Answer:

Step-by-step explanation:

Answer:

9

Step-by-step explanation:

Put x=0

p(0) = 4(0)² - 12(0) + 9 - p(0)=0-0+9 p(0) = 9

Answer 2

Answer:

Add both equation

Step-by-step explanation:

7a+4b=13 -------- (1)

4a+7b=9 --------- (2)

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11a+11b=22 ---------(3)

Now,

Dividing equation( 3 )by 11

a+b=2

Ans = a+b= 2