Test 8, Unit 10 Flashcards
Express algebraically. 5 more than x
5 + x
Express algebraically. 8 less than n
n - 8
Express algebraically. 2 more than the product of 4 times m
4m + 2
Express algebraically. x squared minus y cubed
x(tiny)2 - y(tiny)3
the square root of s
s (with a square root sign over it)
T = 3x + 2 Find T if x = 1
T = 5
T = 3x + 2 Find T if x = 1/3
T = 3
T = 3x + 2 Find T if x = 4
T = 14
4(3 + 6) - 9 =
4(9) - 9 =
36 - 9 =
27
5 + 3 * (15 - 8) =
5 + 3 * 7 =
5 + 21 =
26
(12 - 2 * 3) over 4 =
(12 - 6) over 4 =
6 over 4 =
3/2 or 1 1/2
6 to the 3rd power (cubed)
6 x 6 x 6 =
216
2 to the 4th power
2 x 2 x 2 x 2 =
16
8 squared
8 x 8 =
64
square root of 64
8
because 8 x 8 = 64
square root of 100
10
square root of 25
5
x + 4 = 20/2
x + 4 - 4 = 10 - 4
x = 6
x - 7 = 3 * 2
x - 7 = 6
x - 7 + 7 = 6 + 7
x = 13
5x = 20
x = 20/5 x = 4
2/3x = 8
3/2 * 2/3x = 8 * 3/2
x = 24/2
x = 12
x/4 + 3 = 7
x/4 +3 - 3 = 7 - 3
x/4 = 4
x/4 * 4 = 4 * 4
x = 16
3x - 6 = 12/4
3x - 6 + 6 = 3 + 6
3x = 9
x = 3
19 + (-6) =
same as 19 - 6
13
-5 + (-4) =
-9
12 - (-9) =
same as 12 + 9 (2 negatives cancel making a +)
21
(-6) - (+8) =
-14
6(-5) =
when multiplying 1 - & 1 + answer is -
-30
-8(-4) =
when multiplying 2 - answer is +
32
14 - (+5) =
same as 14 - 5
9
-36/-6
when dividing 2 - answer is +
6
-64/8
when dividing 1 - & 1 + answer is -
-8
-12/-2 - (-8) =
6 + 8 =
14
8 + (-8) =
same as 8 - 8
0
5 - 3 - 2 - 4 - 1 =
5 - 3 - 2 - 4 - 1 = 2 - 2 - 4 - 1 = 0 - 4 - 1 = -4 - 1 = -5
square root of 576
24
square root of 2,916
54
T or F 5(tiny 1) = 5
true
T or F 5(tiny 0) = 0
false
T or F Order of operations says to simplify within parentheses first.
true
T or F The division axiom states that both sides of an equation can be divided by the same number, except 0, without changing the value of the equation.
true
T or F The algebraic expression xy has two terms.
false
T or F A number and a variable written side by side as in 3n indicate multiplication.
true
T or F Division in algebra is usually shown using the fraction bar.
true
T or F The absolute value of -8 is -8.
false
T or F P = 2L + 2w is an example of a formula.
true
T or F -9 is greater than 0.
false
T or F The sum of two negative numbers is a positive number.
false
Three times a number is 33. What is the number?
3n = 33 n = 11
Four less than twice a number is 20. What is the number?
2n - 4 = 20
2n = 24
n = 12
