In ΔGHI, \text{m}\angle G = (10x+9)^{\circ}m∠G=(10x+9)∘, \text{ m}\angle H = (3x+13)^{\circ}m∠H=(3x+13)∘, and \text{m}\angle I = (x+4)^{\circ}m∠I=(x+4)∘. What is the value of x?x?

Kevin and randy muise have a jar containing 78 coins, all of which are either quarters or nickels. the total value of the coins in the jar is $13.90. how many of each type of coin do they have?

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)