9.2.3 (day 1) Understanding Square Root
Homework
9-88. Find the missing length or area.
a.
15 cm
121 cm2
b.
c.
d.
20
≈ 12.25 ft
9-89. Determine the positive value that makes each equation true. If the answer is not a
whole number, write it as a square root, and then approximate it as a decimal rounded to
the nearest tenth.
a. If x2 = 36, x = ?
x =6
b. If x2 = 65 , x = ?
x ≈ 8.1
c. If x2 = 84, x = ?
x ≈ 9.2
9-90. Use the rule y = –2x + 5 to answer the questions below.
a. What is the slope of the line?
-2
a. Where does the line cross the y-axis?
(0, 5)
d. If x2 = 13, x = ?
x ≈ 3.6
9-91. Copy and complete each of the Diamond Problems below. The pattern used in the
Diamond Problems is shown at right.
9-92. Identify which of the relationships shown below is not a function. Explain your
reasoning.
a.
b.
Table b is not a function
9-93. Kenneth claims that (2, 0) is the point of intersection of the lines y = –2x +
4 and y = x − 2. Is he correct? How do you know?
He is correct