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4ac + 2ad + 2bc +bd = 2a*(2c + d) + b*(2c + d) = (2c + d)*(2a + b)
b = 1/2 (a - c) or for a = 3b - 2c: b = 1/3 (a + 2c) for a= 2bc + d is b= (a-d)/2c a= 2b +c is c= a - 2b b=1/3(a-2c)
c - 5d = 2 2c + d = 4 Multiply eqn 1 by 2: 2c - 10d = 4 Subtract this from eqn 2: 0c + 11d = 0 which implies that d = 0 Then, by eqn 1, c = 2
(a-d)/2c=b
(2a + b)(2c + d)
4ac + 2ad + 2bc +bd = 2a*(2c + d) + b*(2c + d) = (2c + d)*(2a + b)
its worth 2c
b = 1/2 (a - c) or for a = 3b - 2c: b = 1/3 (a + 2c) for a= 2bc + d is b= (a-d)/2c a= 2b +c is c= a - 2b b=1/3(a-2c)
The expression is 5d+2c and the unknown variables are d and c
The answers to 1A are 1.rivalry, 2.penetrate, 3. persistence, 4. short-lived, 5. prompt, 6. sadness, 7. hastening, 8. guess at. Hope it helped. Grace Shiba a National Taekwondo Sparring Competitor. I am 12 years old.
c - 5d = 2 2c + d = 4 Multiply eqn 1 by 2: 2c - 10d = 4 Subtract this from eqn 2: 0c + 11d = 0 which implies that d = 0 Then, by eqn 1, c = 2
(a-d)/2c=b
0
(2a + b)(2c + d)
(3a - 2c)(b - d)
(2a + b)(2c + d)
(2a + b)(2c + d)