use the distributive property to write an equivalent expression without parentheses.

check all that apply.
a. distribute 9, by multiplication, to the variable, a, and to the constant, 8.
b. write the two multiplications, 9(a) + 9(8)
c. the expression 9(a) is written as 9a.
d. the expression 9(8) equals 72.
e. the equivalent expression is 9a + 8.
f. the equivalent expression is 9a + 72.

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.