it would be B 540 in^2 I think
Answer:
x=5, y=8. (5, 8).
Step-by-step explanation:
3x+5y=55
5x+4y=57
---------------
5(3x+5y)=5(55)
-3(5x+4y)=-3(57)
-------------------------
15x+25y=275
-15x-12y=-171
---------------------
13y=104
y=104/13
y=8
3x+5(8)=55
3x+40=55
3x=55-40
3x=15
x=15/3
x=5
Answer:
(i) 5 + 2√6
(ii) 1 - 2√6
Step-by-step explanation:
(i) (√3+√2)(√3+√2)
⇒ √3(√3+√2) + √2(√3+√2)
or
⇒ (√3)² + (√3 × √2) + ( √2 ×√3 ) + ( √2 × √2 )
or
⇒ 3 + √6 + √6 + 2
or
⇒ 5 + 2√6
(ii) (√3+√2)(√3-√2)
⇒ √3(√3-√2) + √2(√3-√2)
or
⇒ ( √3 × √3 ) - ( √3 × √2) + ( √2 × √3 ) - ( √2 ×√2)
or
⇒ ( 3 ) - ( √6 ) + ( √6 ) - ( 2 )
or
⇒ 1 - 2√6
