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Answer:
160
Step-by-step explanation:
15x + 30y = -10....reduce by dividing by 5
3x + 6y = -2...same as first equation...same line ..means infinite solutions
For problem 1, it will be 25/100, which is equal to 25%
2) The relationship is that both, the bar model and the proportion, show that x is 1/4 of the actual amount. The bar graph is more a visual. However, in both cases, the x can be solved for to be 25%
3) The percent error for 23°C will be less since it is closer to 25°C, the actual amount. The percent error is greater for 5°C since it is farther for 25°C.
General rule so exg
round 14 to the nearest 10, the answer is 19 becuase 4>5 so round down
if 15 then round to nearest 10=20 because 5<u>></u>5
so tenth digit is the 6
look at the next digit
7
7>5 so round up
34.7