1. use a commutative law to find an equivlant expression f+sr? sr+f?
2. determine which real number corresponds to the situation. The record high tempature for a date is 97.8 above zero. The cooresponding number for this sentence is 97.8?
3.Translate to an algebric expression. The sum of c and n? c+n?
4. divide if possible -64/-8=-72?
5. divide if possible -90/10=-9?
6. multiply 2/7 by (7/1)=14/7?
7. solve using addition princible.7.4=x-2.5. x=4.9?
8. find the oppisite of 50=-50?
9. add. do not use number line except to check
-7.1+8.7=15.8?
10. a mountian with a base 12,231ft below sea level rises 15,202ft. what is the elevation above sea level of its peaks? 2971?
1. To use the commutative law to find an equivalent expression for f + sr, we can simply rearrange the terms. The commutative law states that the order of addition does not change the result. Therefore, f + sr is equivalent to sr + f.
2. The given sentence states that the record high temperature is 97.8 above zero. This means that the temperature is just 97.8. Therefore, the corresponding real number is indeed 97.8.
3. To translate "The sum of c and n" into an algebraic expression, we simply add c and n. So the algebraic expression is c + n.
4. When dividing -64 by -8, we divide both the numerator and the denominator separately. Dividing -64 by -8 gives us a quotient of 8. Therefore, -64 divided by -8 is equal to 8.
5. When dividing -90 by 10, we divide -90 by 10, which gives us -9. So, -90 divided by 10 is equal to -9.
6. To multiply 2/7 by 7/1, we multiply the numerators (2 * 7) to get 14, and multiply the denominators (7 * 1) to get 7. So, 2/7 multiplied by 7/1 is equal to 14/7. However, we can simplify the fraction 14/7 further to get the final answer of 2.
7. To solve the equation 7.4 = x - 2.5 using the addition principle, we first add 2.5 to both sides of the equation to isolate the variable x. This gives us 7.4 + 2.5 = x. Adding 7.4 and 2.5 gives us 9.9, so the solution to the equation is x = 9.9.
8. To find the opposite of 50, we simply change the sign to its opposite. So, the opposite of 50 is -50.
9. To add -7.1 and 8.7, we simply add the two numbers together. Adding -7.1 and 8.7 gives us 1.6. Therefore, the sum of -7.1 and 8.7 is not 15.8, it is 1.6.
10. To find the elevation above sea level of the peaks, we add the base below sea level (12,231 ft) to the rise (15,202 ft). Adding 12,231 ft and 15,202 ft gives us 27,433 ft. Therefore, the elevation above sea level of the peaks is 27,433 ft, not 2,971 ft.