Answer:
165 more students are coming
Step-by-step explanation:
To solve percentage problems we do = since the 70 is 35% that is the part and the percentage is 35 since the total is unknown it is the x
now we cross multiply
70 * 100 = 35 * x
7000 = 35x now we divide both sides by 35 so that the x is alone
35x ÷ 35 = x
7000 ÷ 35 = 200
x = 200 the total number of students COMING is 200 so now we subtract 35 to find out how many MORE are coming
200 - 35 = 165
Given:
Let baked beans be x
Let brown sugar be y
Let biscuits be z
5x + 4y + 2z = 150 - 26
5x + 4y + 2z = 124
a can of baked beens costs half as much as a packet of biscuits:
x = 1/2 * z = z/2
a packet of sugar is 3.00 cheaper than a packet of biscuits
y = z - 3
We substitute x and y with its values:
5x + 4y + 2z = 124 ; x = z/2 ; y = z-3
5(z/2) + 4(z-3) + 2z = 124
5z/2 + 4z - 12 + 2z = 124
5z/2 + 6z = 124 + 12
2(5z/2 + 6z) = 2(136)
5z + 12z = 272
17z = 272
z = 272/17
z = 16 price of a packet of biscuits.
can of baked beans : x = z/2 ; x = 16/2 = 8
packet of sugar : y = z - 3 ; y = 16 - 3 = 13
5x + 4y + 2z = 124
5(8) + 4(13) + 2(16) = 124
40 + 52 + 32 = 124
124 = 124
Answer:
wait is it y=20x + 40y = 30x+ 10
or y= 20x+ 40 y= 30x + 10
I cant really help you otherwise sorry when you clarify it i will edit the correct answer in
The answer is 1.9! Explanation: 20.3-18.4=1.9