A teacher has 21 red pens if the ratio of red pens to blue pens she owned was 3:1 how many pens did she have in total

The square root of a negative number, such as StartRoot negative 144 EndRoot, is undefined. Explain why the square root of - x, StartRoot negative x EndRoot, is not necessarily undefined and what this means about the domain and range of f (x) =

If two angles are congruent and supplementary then each is a right angle true or false

What is the measure of the radius of A. circumference = 37.68

2x - 2y = 12 29. - 3y = - 2

Five fractions equivelent to 4/12

Diego measured the length of a pen to be 22 cm. The actual length of the pen is 23 cm Which of these is closest to the percent error for Diego's measurement? a. 4.3% b. 4.5% c. 95.7% d. 104.5%

You started with $25 in your pocket. You were lucky and found two dimes on the ground. You then bought a sandwich for $3.99 and an iced tea for $1.48. How much money do you have left?

Convert 0.265 to a percent round to the nearest tenth

Consider the graph of the linear function h (x) = - 2/3x + 5. Which could you change to move the graph down 3 units? the value of b to - 3 the value of m to - 3 the value of b to 2 the value of m to 2

What is the simplified form of this expression, written in scientific notation? (1.5*10^7) ⋅30,000⋅ (6.7*10^5)