Answer:
50 of D and 10 of C
Step-by-step explanation:
First of all, put this data into 2 equations.
You sold 60 items, so C+D=60
C is $5 so we can represent it by 5C
D is $7 so we can represent it by 7D
You made $400 total from C and D, so 5C+7D=400
We can use simultaneous equations to solve this.
To eliminate one of these variables, we'll multiply the first one by 5 to make it 5C like the other.
5(C+D=60) (make sure you multiply both sides.)
so 5C+5D=300
5C+7D=400
Now we solve it:
5C-5C+7D-5D=400-300
7D-5D=100
2D=100
D=50
Now we can substitute this with one of the equations to find C
C+50=60
C=60-50
C=10
so, (10x5)+(50x7)=400
Answer:
x = 2 and x = -3
Step-by-step explanation:
We need to find the value of x in the below expression.
Adding 1 to both sides,
Squaring both sides,
Hence, this is the required solution.
You could just use a calculator but...
5573.858974 or just 5573.86
Answer:
p = 8
Step-by-step explanation:
Given that,
42p = 414
We need to find the value of p. It can be done by dividing both sides by 42. So,
Out of the given options, option (b) i.e. 8 is the nearest option. So, the value of p = 8.
