Question

Please answer I will mark u as the brainliest

Answer 1

Answer:

1st    perimeter is( 3x+1) +(4x+2)+ 5x

=(3x+4x+5x+1+2+)

=12x +3

2nd    perimeter is 2(l+d)

2{(3a-4b)+(5b+2a)}

2(5a-b)

=10a - 2b

3rd    (02)²

=(1+1)²    {a+b}² =a² +b² +2ab

=1² + 2.1.1 +1²

=4

(311)²

(300+11)²

300² + 2.300.11 + 11²

96721

(89)² = (90-1)²

(a-b)² = a² + 2ab +b²

7919

(13x7)

91

(12.5 x 11.5)

143.75

(153 x 147)

(a+b)(a-b)   = a²-b²

(150 + 3) (150 - 3)

150² - 32

= 22491

4rd    1526.26

1000 + 500 +20 + 6 + 2÷10 + 6÷100

a+6 = 9

a = 3

Step-by-step explanation: