Un roseau est placé verticalement contre un mur. Si on ecarte le pied de ce roseau de 45 cm du bas du mur, son sommet glisse de 15 cm vers le bas. Quelle est la longueur de ce roseau

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

In priyas math class there are 10 boys and 15 girls. what is the ratio of boys to girls in priyas math class? express your answer as a decimal

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)