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Mathematics, 05.05.2020 00:17, Callmetay24
Here’s another way to think about the number line model for 2 – (-3): if we were adding 2 + (-3), we’d first move two units to the right. Then, we’d move three units to the left, because we move left when adding negative integers. But instead, we’re subtracting -3. Addition and subtraction are inverse operations, or opposite operations; they undo one another. So we move in the opposite direction, right, and end up with a sum of 5. As a result, the number line models for 2 – (-3) and 2 + 3 are identical. This shows that subtracting a negative integer is the same as adding a positive integer.
Subtracting -9 from any number is the same as
A
subtracting 9 from that number.
B
subtracting 0 from that number.
C
adding 9 to that number.
D
adding -3 to that number.
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Mathematics, 21.06.2019 20:30, Travisbennington
Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.
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Here’s another way to think about the number line model for 2 – (-3): if we were adding 2 + (-3), we...
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