Four times bruce's age plus two times sarah's age equals 84. bruce's age is also three times sarah's age. how old is bruce?

The circumference of a circle is 5 pi cm. what is the area of the circle?

State if the two triangles are congruent. if they are, state how you know?

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?