PLEASE HELP! Multiply each equation by a number that produces opposite coefficients for x or y.
4.2 + 5y = 7
>
X
3.x - 2y = -12
X

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

To decrease an amount by 16% what single multiplier would you use

Atype of plant is introduced into an ecosystem and quickly begins to take over. a scientist counts the number of plants after mmonths and develops the equation p(m)= 19.3(1.089)^m to model the situation. most recently, the scientist counted 138 plants. assuming there are no limiting factors to the growth of the plants, about how many months have passed since the plants werefirst introduced? a)o 6.1b)0.6.6c)10 72d)o 23.1