Learn this and it can answer all ur percent problems
percent formula : is/of = %/100
36 is 75% of what number...
is = 36
% = 75
of = x.....because that is what u are looking for.
now sub into the percent formula
is/of = %/100
36/x = 75/100
cross multiply because this is a proportion
75x = 36(100)
75x = 3600
x = 3600/75
x = 48
so 36 is 75% of 48
19.B 20. D 21. A. 22. A
You just put in calculator make sure you click the mode button and highlight degree so it can work
Answer:
A score of 95 she must obtain on the fifth exam to have an average of 90 or better for the five exams
Step-by-step explanation:
average = sum of all terms / number of terms
average = 94 + 83 + 92 + 86 + x / 5
90 = 355 + x / 5
multiply both sides by 5,
90 * 5 = 355 + x / 5 * 5
450 = 355 + x
subtract 355 from both sides to get x alone
450 - 355 = 355 + x - 355
95 = x
Answer:
2 barn and 4 corn
Step-by-step explanation:
Here we have to pay attention to milk, because both recipes require the same amount of flour, 3 cups, so the flour will be used in equal amounts whatever the recipe we use. Given this, we can only bake 6 trays at most.
Can we bake 6 of barn? YES! Using all our flour and 6*2=12 cups of milk and getting 6 trays of barn muffins. This will give us $2 * 6 = $12. However we keep 8 cups of milk with not use, that could have been used to bake one of corn that are twice as profits as barn. What happens if we replace one of the 6 barn trays by one of corn?
This way we will have 5 of barn and 1 of corn and we will be using 10 + 4 = 14 cups of milk. Our profits will be: $2*5 + $3*1 =$13. This will improve our income!
Lets replace another barn by one of corn. This way we have 4 of barn and 2 of corn: $2*4 + $3*2 = $14. Again, more income!!
Lets replace another and have 3 barn and 3 corn: $2*3 + $3*3 = $15. And we can bake them, as they need 2*3 = 6 cups for barn and 4*3=12 cups of milk for corn.
If we replace another we will have 2 of barn and 4 of corn. Our income will be: $2*2 + $3*4 = $16. This implies using 4 cups of mil for barn and 16 cups of mil for corn. So, we use all of our milk.
Any change in the distribution of barn and corn will, even impossible to bake as there will not be more ingredients or less profit
Step-by-step explanation:
As always, the "unit rate" can be written two ways. You have not specified which one you want.
.. (30 lb)/(1/3 ac) = 90 lb/ac
.. (1/3 ac)/(30 lb) = (1/90) ac/lb
