Use the additive inverse to find −123.45−(−234.76).(1 point)
Responses
121.31
121.31
111.31
111.31
−358.21
negative 358.21
−111.31
The correct answer is −111.31
Use the additive inverse to find −2445−6710.(1 point)
Responses
3112
31 Start Fraction 1 over 2 End Fraction
−31110
negative 31 Start Fraction 1 over 10 End Fraction
−18110
negative 18 Start Fraction 1 over 10 End Fraction
−3112
Use the additive inverse to find −24 4/5−6 7/10.(1 point)
Responses
3112
31 Start Fraction 1 over 2 End Fraction
−31110
negative 31 Start Fraction 1 over 10 End Fraction
−18110
negative 18 Start Fraction 1 over 10 End Fraction
−3112
The correct answer is -31 12/50.
Use the additive inverse to find −24 4/5−6 7/10.(1 point)
Responses
31 1/2
31 Start Fraction 1 over 2 End Fraction
−31 1/10
negative 31 Start Fraction 1 over 10 End Fraction
−18 1/10
negative 18 Start Fraction 1 over 10 End Fraction
−3 1 12
The correct answer is -31 1/10.
Subtract Rational Numbers Quick Check
3 of 53 of 5 Items
Question
Consider 16–20.5. What is the solution? Represent the subtraction on a horizontal number line diagram.
(1 point)
Responses
4.5
A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
4.5 Image with alt text: A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
−4.5
A number line ranges from negative 21 to 15 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 20.5 to 16.
negative 4.5 Image with alt text: A number line ranges from negative 21 to 15 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 20.5 to 16.
−4.5
A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
negative 4.5 Image with alt text: A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
16
A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
The correct response is: A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
Consider 16–20.5. What is the solution? Represent the subtraction on a horizontal number line diagram.
(1 point)
Responses
4.5
A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
4.5 Image with alt text: A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
−4.5
A number line ranges from negative 21 to 15 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 20.5 to 16.
negative 4.5 Image with alt text: A number line ranges from negative 21 to 15 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 20.5 to 16.
−4.5
A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
negative 4.5 Image with alt text: A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
16
A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
16 Image with alt text: A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
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The correct response is: A number line ranges from negative 4 to 16 in increments of 1. A solid line with dots on both ends is drawn on the number line, ranging from negative 4.5 to 16.
Subtract −6−(−8).(1 point)
Responses
−2
negative 2
14
14
2
2
−14
To subtract −6−(−8), we can rewrite it as −6+8 and then perform the addition:
-6 + 8 = 2
So, the correct answer is 2.
Subtract 17−(−18).(1 point)
Responses
35
35
−35
negative 35
1
1
−1
To subtract 17−(−18), we can rewrite it as 17+18 and then perform the addition:
17 + 18 = 35
So, the correct answer is 35.
Of these things in an environment, which one is a living thing?(1 point)
Responses
water (river)
water (river)
fungus (mushroom)
fungus (mushroom)
soil (clay)
soil (clay)
air (wind)
The correct answer is fungus (mushroom). Fungi, like mushrooms, are living organisms.
What made the discovery of cells possible?(1 point)
Responses
the use of magnifying glasses
the use of magnifying glasses
the invention of the microscope
the invention of the microscope
the study of viruses and bacteria
the study of viruses and bacteria
the observation of cells by Hooke and Pasteur
The correct answer is the invention of the microscope. The microscope allowed scientists to observe and study cells for the first time.
Which of the following best describes cell theory?(1 point)
Responses
cell theory describes the three criteria for determining living things.
cell theory describes the three criteria for determining living things.
cell theory describes the difference between multicellular and unicellular organisms.
cell theory describes the difference between multicellular and unicellular organisms.
cell theory describes the tiny structures that are found within cells.
cell theory describes the tiny structures that are found within cells.
cell theory describes the process of how cells come from preexisting cells.