Ellie is 5 times as old as her sister Emma. In 2 years Ellie will be 3 times as Emma. How old is Emma now?
1 answer:
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Answer:
Last year Dr. Potter give<u> 32 </u>Polio vaccination and <u>28</u> measles vaccination.
Step-by-step explanation:
Given:
Each Polio vaccination consists of 4 doses , and each measles vaccination consists of 2 doses.
Last year ,Dr. Potter gave a total of 60 vaccinations that consisted of a total of 184 doses.
Now, to find the number of polio vaccinations and many measles vaccination.
Let the number of Polio vaccination be
And let the number of measles vaccination be
So, the total number of vaccinations:
.......(1)
<em>As, given each Polio vaccination consists of 4 doses , and each measles vaccination consists of 2 doses.</em>
Thus, the total number of doses:
Substituting the value of from equation (1):
<em>Subtracting both sides by 120 we get:</em>
<em>Dividing both sides by 2 we get:</em>
<em>The number of Polio vaccination = 32.</em>
Now, putting the value of in equation (1):
<em>The number of measles vaccination = 28.</em>
Therefore, last year Dr. Potter give 32 Polio vaccination and 28 measles vaccination.