Algebra math problems?
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1. Find the value(s) of x that make this statement true: IxI =18.
2. The temperature in Moorhead was 12 F at noon and -8 F at 10 p.m. the same day. Express the change of the temperature as a signed number.
3. Write these numbers using scientific notation.
a. 123,456
b. 0.0135
4. Perform the following operations.
a. 5/6 + 3/10
b. 5/6 - 3/10
c. 8/5 /divided by 2
d. 3/5 *times 10/21
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Answers & Comments
1. x=(18,-18)
2. 12 - (-8) = -20
3. 1.23456 x 10^1 and 1.35 x 10^-2
4.
25/30 + 9/30 = 34/30 or 1 and 2/15
25/30 - 9/30 = 16/30 = 8/15
8/5 * 1/2 = 8/10 = 4/5
3/5 * 10/21 = 30/105 = 6/21
Dave's answers are correct except on 3a-
123,456 = 1.23456 * 10^5