Answer:
a)
, b)
, c) 
Step-by-step explanation:
We proceed to solve each exercise below:
a) 




b) 





c) 







Answer:
15.75 > 15.57
Step-by-step explanation:
1. 15.75 is greater than 15.57. ">" means greater than.
2. 15.75 < 15.57 is wrong because 15.75 is not less than 15.57
3. 15.75 does not equal 15.57. They are not equal numbers.
4. This means " 15.75 > 15.57" is correct. Even though they are both 15 the number after the decimals are important to look at too. 75 is greater than 57.
Answer:
The desired ordered pair is (1/2, 3/2).
Step-by-step explanation:
Let's use the substitution method here to determine either x or y first:
x = 5y - 7 (given). Then 5y - 7 can be substituted for x in x + 5y = 8:
5y - 7 + 5y = 8.
Combining like terms, we get 10y = 15, so that y = 3/2.
Find x by substituting 3/2 for y in x = 5y - 7: x = 5(3/2) - 7 = 15/2 - 14/2 = 1/2
The desired ordered pair is (1/2, 3/2).