Download Evaluate the expression when x = 6

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MATH 8
LESSON 9.1 SQUARE ROOTS
Find the square roots of the number.
16
25
18
81
20
24
Geometry – The area of a square is 49 square feet. Find the side length.
Approximate the square root to the nearest integer.
___
__
26
-√120
28
√17
30
1024
___
√250
Use a calculator to approximate the square root. Round to the nearest tenth.
___
___
____
34
-√10
36
√110
38
√1325
Evaluate the expression when a = 48 and b = 12.
_______
42
√a + b + 4
44
__________
√b2 – (a + 15)
In Exercises 54-57, match the number with a point on the number line.
54
__
√15
56
__
√95
22
1600
32
___
-√7.4
40
____
√6.92
58
Photography – You can use the following rule of thumb when photographing fireworks: The
f-stop, a number that describes the size of the opening of the camera lens, should be the
number closest to the square root of the film speed. You have a camera with f-stop numbers
2.8, 4, 5.6, 8, 11, 16, and 22. Which f-stop should you use to photograph fireworks if you are
using a film speed of 64? of 100?
Solve the equation. Round to the nearest hundredth if necessary.
60
15 = 2h2 – 3
66
_
Consider the function y = √x.
62
1400 = 10z2 + 2
64
a)
Make a table of ordered pairs (x, y) for x = 0, 1, 4, 9, 16, 25.
b)
Plot the ordered pairs from part (a) on a coordinate plane.
c)
_
Writing – Is y = √x a linear function? Explain.
1.5n2 + 7 = 20