Answer:
409
Step-by-step explanation:
18 x
--- = ---
22 500
18 x 500 = 9000
9000/22 = 409
Answer:
11
Step-by-step explanation:
The two equations appear to be ...
- 12x +4y = 152
- 32x +12y = 420
These can be solved for y using Cramer's rule:
y = (152(32) -420(12))/(4(32) -12(12)) = -176/-16 = 11
The cost of the vegetarian lunch is 11.
_____
<em>Comment on Cramer's Rule</em>
For equations ...
ax +by =c
dx +ey = f
The solutions are ...
x = (bf -ey)/(bd -ea)
y = (cd -fa)/(bd -ea) . . . . note the denominators are the same expression
Once you memorize the pattern of products, this can be the simplest way to solve a pair of equations--especially if you only need one of the variable values.
Answer:
more information?
Step-by-step explanation:
this question just confuses me a little bit
Answer:
Step-by-step explanation:
Let
m-----> the amount of minerals
w-----> the number of workers
we know that
so
-----> the relationship represent a proportional variation
Eddie sold 12 pies and Marsha sold 15 pies.
They both made $120.
Find multiples of 8 that are divisible by 10
