Answer:
$12
Step-by-step explanation:
first we multiply the candies by the weight to find out the total weight
60* 25= 1500g
1500g to kg = 1500/1000 = 1.5kg
so its going to be 1.5kg * 8
1.5* 8 = 12
Answer:
1. x = 4 and y = 1
2. x= 5 and y = 3
Use the examples below to complete 3 and 4.
Step-by-step explanation:
To solve each system of equations, use elimination.
1. Stack the equations and subtract to perform elimination.
2x + 2y = 10
- x + 2y = 6
-------------------------
x = 4
Substitute x = 4 into an equation to solve for y.
2(4) + 2y = 10
8 + 2y = 10
2y = 2
y = 1
2. Stack the equations and subtract to perform elimination.
3x + y = 18
- 2x + y = 13
-------------------------
x = 5
Substitute x = 5 into an equation to solve for y.
3(5) + y = 18
15 + y = 18
y = 3
Continue the same method for numbers 3 and 4.
Answer:
1. 24
2. 24/3 = 24 divided by 3
Step-by-step explanation:
We have for example 2 numbers, a and b, and their product, number c.
So,
c = a * b
If value of a is increased by 30 percent, it means that the new value will be old value plus 30 percent of the value; so new value is:
a1 = a + 30% * a
If we elaborate this equation, we get:
a1 = a + 30/100 * a, i.e.:
a1 = 100/100 * a + 30/100 * a, i.e.:
a1 = (100+30)/100 * a, i.e.:
a1 = 130/100 * a .
Same for other number b:
It its value is increased by 20 percent, it means that the new value will be old value plus 20 percent of the value:
b1 will be the notation for the new value, and b is the old value
b1 = b + 20% * b
b1 = 120% * b
b1 = 120/100 * b
-------------------------------------
When wanting to multiply a1 with b1, we get:
c1 = a1 * b1
c1 = 130/100 * a * 120/100 * b
When reducing fractions, we get:
c1 = 13/10 * a * 12/10 * b
When multiplying free numbers and move the order of a and b, we get:
c1 = (13*12)/(10*10)*a*b
c1 = 156/100 * a * b
-> a * b is c (c = a * b), so:
c1 = 156% * c
c1 = (100 + 56)% * c
Which means that the value of c is increased by 56%.