Answer:
Work study
Step-by-step explanation:
I did that question.
<span>The method of solving "by substitution" works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, "substituting" for the chosen variable and solving for the other. Then you back-solve for the first variable.</span>
Answer:
3:4
Step-by-step explanation:
probability = what wanted : total outcome
= 3 heads : 4 tosses
= 3 : 4
