The number of marbles in 13 bags The number of marbles you had before purchasing more bags. The number of marbles in each of the 13 bags.
#2
The number of children Jamie has. The number of months. The monthly tuition for the science club The one-time materials fee. The total cost for one child to join the science club.
#3
Use the area model.
3π₯
β2
2π₯
6π₯ 2
β4π₯
2π¦
+5
+15π₯
β10
6π₯ 2 + 11π₯ β 10
5π¦
+5
10π¦ 2
+10π¦
β3 β15π¦
β15
10π¦ 2 β 5π¦ β 15
#4
Multiply Exponents
π¦ 6 β π¦ 4 = π¦10 Add Exponents
Multiply Exponents
π§6 β π§3 = π§9 Add Exponents
To raise to a power; multiply exponents. To multiply; add exponents.
#5
3π β 2 9 27 β 4
=1
1 3π β 2 β 3 =1 27 β 2 9 3π =1 9
Simplify the radicals.
Simplify the numerator and denominator. Re-write the equation with all terms in the same base.
3π = 30 2 3 Use the properties of exponents.
πβ2=0 π=2
#6
3π β 5 32
β 45 3π
32
β 9
=3
Simplify the radicals.
=3
3π =3 32 β 3
Use the properties of exponents.
3π =3 33
Use the properties of exponents again.
πβ3= 1 π=4
#7
=
3 π5
π. 7 π₯ π.
5
π3
π.
π
π₯π
#8
π.
1 (7π¦ 3 )2
π.
5 π3
π.
π ππ
#9
π. real; the 3 is irrational π. real; 4
3 β 5
=
2 3 5
rational
π. real; irrational π. real;
7 9
2 9
9 9
+ = = 1 rational, integer, whole
# 10
Distribute
Distribute
20π€ β 10 = 8 + 2π€ β 12 + 12
2π‘ + 8 = 7 + 5π‘ β 20
Combine 2π‘ + 8 = 5π‘ β 13 Like 20π€ β 10 = 8 + 2π€ Terms β2π€ β2π€ β2π‘ β2π‘ 2t from 8 = 3π‘ β 13 Subtract 18π€ β 10 = 8 Subtract 2w each side of the from each side +10+10 +13 +13 equation. of the equation. 18π€ = 18 Divide each 21 = 3π‘ each Add Divide 13 to each side of the 3 3 18 18 Add 10 to each side of the side of the equation by side of the equation by equation. 7 = π‘ π€ = 1 3. equation. 18.
# 22 This is not a function because β4 (domain) is assigned to more than one value in the range. This is a function because every element of the domain is assigned to exactly one element in the range. This is a function because every element of the domain is assigned to exactly one element in the range.
This is not a function because β3 is assigned to multiple values in the range.
a. There are no games left in the warehouse after 27 shipments.
b. He has 9,000 games in the warehouse before making any shipments. c. The slope represents the decrease in the number of games in the warehouse per shipment. d. Domain 0 β€ π₯ β€ 27 and Range 0 β€ π¦ β€ 9,000
# 30
192
Domain π β€ π β€ π and Range π β€ π β€ πππ
# 31
Graph the line with a y-intercept of 2 and a slope of
π . π
Translate the line 4 units left.
# 32
Graph the line with a y-intercept π of β3 and a slope of . π
Translate the line 3 units up.
# 33
Initial value
π. ππ = 7 + (π β 1)(β3) Common difference
28 β 16 = 12 blocks Let x be the number of bricks and y the number of blocks.
π₯ + π¦ = 28 0.38π₯ + 1.56π¦ = 24.80
π¦ = 28 β π₯
Substitute
0.38π₯ + 1.56 28 β π₯ = 24.80
0.38π₯ + 43.68 β 1.56π₯ = 24.80 Combine β1.18π₯ + 43.68 = 24.80 Like Terms β43.68 β43.68 Subtract 43.68 from each β1.18π₯ = β18.88 side of the equation. β1.18 β1.18 Divide each side of the π₯ = 16 Distribute
equation by -1.18.
# 40
Let a = # adult tickets and c = # of child tickets Use substitution to replace c with 3a.
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