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Step 1

Collect x terms on one side (here we subtract 3x from both sides to give 2x on the left, and 0x, on the right)

Step 2

Collect the non x terms ...

A baby can either be a boy or a girl, so there are only two possible outcomes. This means that the probability of the next baby being born a boy is 1 out of the 2 outcomes. This also can be written as 0.5...

Accept any two from:

Toxicity

Dosage

Efficacy

side effects

using the method, what two numbers multiply to create -1 and add to make 0 -1 must be 1 x -1 therefore answer is (x+1)(x-1) - is it clear how the single x value is cancelled out? x^2 +x -1 -x = x^2 -1

Regular verbs in Spanish follow a series of rules which are easy to follow and remember. Forming the past tense follows these rules - easy peasy!
You take the stem of the verb and add on certain end...