Answer:
The answer is
Step-by-step explanation:
we know that
In this problem we have
so
The angle 
belong to the third or fourth quadrant
The value of 
is negative
Step 1
Find the value of
Remember
we have
substitute
------> remember that the value is negative
Step 2
Find the value of 
we have
substitute
To solve this problem you must apply the proccedure shown below:
1- You must apply the following formula:
Where
is the residual, 
is the observed value 
and 
is the predicted value .
2- You only need to substitute the 
into the equation 
and then, you must apply the formula for calculate the residual:
The answer is: The residual is 
Answer:
y:3
y/3:1
She can make y/3 cards in one minute
Step-by-step explanation:
Lets split the box in pieces and then add:
top = 20*15 = 300
sidesA = 2*20*9 = 360, is multiplied by 2 cause there are 2 sides like this
sidesB = 2*9*15 = 270, is multiplied by 2 cause there are 2 sides like this
so in total we have:
total = 300 + 360 + 270 = 930 cm^2
if we express this quantity in mm^2 we have:
<span>1cm² = 100 mm²</span>total = 930*100 = 93000 mm^2
so if the tiles are 5 mm^2 we need:
total tiles = <span>93000/5 = 18600
we need 18600 tiles of 5 mm^2</span>
