1.6. Practice question answers
Chapter 1 practice question answers
1.1 Introduction
1. a. 5x3 , 8x2 , 2x
b. –y4 , 9a2 , a , –1
2. a. –x + 19y
b. 6a2 – 31b
c. 9m2 + 64n
3. a. 10a2 + 13
b. -19x + 39y
c. 17ab – 28xy
d. 40y2 – 11y – 63
e. 21r2 + 28rt2 – 6rt –8t3
f. x2 – x +
1.2. Equations
1. a. x = 19
b. y =
c. x =
d. t =
e. x = 2
f. y =
g. t = – 0.05
h. x =
2. a. $375 + y
b. 175 – y
c. 45 – w
d. ,
1.3. Measurement Systems
1. a. 0.439 m
b. 0.0000483 kL
c. 7.23 kg
d. 520 mm
3. a. 4000 mm
b. 63006 g
4. a. 38 g
b. 5000 cm3
c. 18,000 cm3
d. 0.039375 kL
1.4. Ratios, Rates, and Percent
1. a.
b.
c.
2. 76.5 km/h
3.
4. $3.69
5. $18,000
6. 40%
7. a. 28%
b. 308
c. 1200
1.5. Exponents and Scientific Notation
1. a. 24
b. 982
2. a. – 92
b. y7
c. x3
d.
e. 81a8 b12
f.
g.
3. a. 4.56 × 107
b. 5.23 × 10-6
4. a. 3578
b. 0.000043