The correct expression that is equivalent to (–2)(a + 6) is:
–2a – 12
Which expression is equivalent to (–2)(a + 6)?
(1 point)
Responses
–2a + 6
–2 a + 6
2a + 12
2 a + 12
–2a – 12
–2 a – 12
–2a + 12
–2a – 12
(1 point)
Responses
whole numbers
whole numbers
rational numbers
rational numbers
integers
integers
irrational numbers
irrational numbers
natural numbers
The correct subsets that apply are:
- Integers
- Rational numbers
(1 point)
Responses
6b – p
6 b – p
6(b – p)
6( b – p )
6 – bp
6 – bp
6bp
6(b – p)
Start Fraction 5 left-parenthesis 14 minus 2 right-parenthesis squared over 2 End Fraction
(1 point)
Responses
60
60
30
30
72
72
360
(1 point)
Responses
188
188
36
36
98
98
224
u + xy = 18 + (10)(8)
u + xy = 18 + 80
u + xy = 98
The correct answer is 98.
A square field has an area of 479 ft2. What is the approximate length of a side of the field? Give your answer to the nearest foot. Explain your response.
(2 points)
Taking the square root of 479, we get the approximate length of a side:
√479 ≈ 21.87 ft
Rounding to the nearest foot, the approximate length of a side of the field is 22 ft.
We round up to 22 ft because it is closer to the actual value of 21.87 ft than rounding down to 21 ft. This ensures that we don't underestimate the length and maintain a conservative estimate.
(1 point)
Responses
Surfing the web
Surfing the web
Taking a catnap
Taking a catnap
Mowing the lawn
Mowing the lawn
Paying bills
(1 point)
Responses
10-15
10-15
20-30
20-30
30-45
30-45
45-60
45-60
(1 point)
Responses
220 - your age
220 - your age
220 + your age
220 + your age
220 x your age
220 x your age
220 / your age
(1 point)
Responses
Soccer
Soccer
Baseball
Baseball
Football
Football
Golf
(1 point)
Responses
Walking
Walking
Bicycling
Bicycling
Hiking
Hiking
Leisurely paced swimming
(1 point)
Responses
Thumb
Thumb
Middle
Middle
Pinky
Pinky
Index
(1 point)
Responses
Stair Climber
Stair Climber
Treadmill
Treadmill
Weight machine
Weight machine
Elliptical trainer