Question

Please tell how to solve this....​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

a=4

b=1

9a^2+16b^2=160

Step-by-step explanation:

(3a+4b)=16 (equation 1)

ab=4(equation 2)

b=a/4

(3a+4(a/4)=16

3a+a=16

4a=16

a=4(substitute in equatioon 2)

4b=4

b=1

then 9a^2+16b^2

9(4)^2+16(1)^2

9(16)+16(1)

144+16=160