Replace * with a monomial so that the trinomial may be represented by a square of a binomial: 1) * + 28a + 49
2) 36 - 24x + *
3) 6.25a^2 + * + 1/4b^2
4) * + 2bc + 100c^2

1) 4a^2+ 28a+49

2) 36-24x+4x^2

Step-by-step explanation:

1) (2a)^2 +2.2a.7+(7)^2

2) (6)^2-2.6.2x+(2x)^2

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: