Answer:
A store sells bread and milk. On Tuesday, 3 loaves of bread and 2 litres of milk were sold for €6.25. On Thursday 4 loaves of bread and 5 litres of milk were sold for €10.90. If b = the price of a loaf of bread and m = the price of
one litre of milk, Tuesday's sales can be written as 3b+2m=6.25.
Part A Using simplest terms, write an equation in band m for Thursday's sales.
PartB calculate the values of b and m
3b + 2m= 6.25 >> Tuesday equation 1
4b + 5m = 10.90 >> Thursday equation 2
Subtract equation 1 and 2
3b+2m-6.25-4b+5m-10.90= 0
b+7m-4.65= 0
b+7m= 4.65+0
b+7m= 4.65
b= 4.65 - 7m
if b= 4.65-7m
then substitute b in b+7m=4.65
4.65-7m+7m= 4.65
4.65-m= 4.65
4.65-4.65= m
m= 0
Step-by-step explanation:
Answer:
The least score the student can get is 71 to get an overall B average at the end of the year.
Step-by-step explanation:
Let the score she needs to get be = x
We now have to take the mean of all the five subjects <em>(including x)</em> and equate it to the least score she can have to get a B grade.
Let us take the least score the student needs to get a B grade to be 85
Mean of all 5 scores =
The least score the student can get is 71 to get an overall B average at the end of the year.
Answer:
100 N to the left
Step-by-step explanation:
They have to be equal and opposite to balance, so they will need a force of 100 N to the left
