Answer:
40.021
Step-by-step explanation:
Unlimited calls = $40
Text message = $0.021
NOTE:There is a difference between the value you gave for cost of text messages in the question and the values given in the group of answers. I will use $0.021 for cost of text messages since it is common to all answer choices.
Total cost = Cost of unlimited calls + cost of text messages
C = $40 + $0.021
= $40.021
Therefore, the equation which represent the total cost in dollars for a month is 40.021
A. 40.021
Answer:
Step-by-step explanation:
l = 4m = 400 cm
w = 3m = 300 cm
Volume = 720000 cubic cm = 720000
length * width * height = 720000
400 * 300 * height = 720000
height = 720000 / 400 * 300 = 72/12 = 6 cm
Answer:
they are side by side but not intersect
Answer:
you may
2x+15+4x+21=90 simplified is 6x+36=90
m<a=33º
m<b=90º
m<c=57º
Step-by-step explanation:
6x+36=90
6x=54
x=9
2(9)+15=33
4(9)+21=57
Answer:
<em>(a) The system that models the situation: 
and 
</em>
<em>(b) David needs 40 pounds of bread flour and 240 pounds of cake flour.</em>
Step-by-step explanation:
The amount of flour mixture is 280 lb. that is 8% plain flour.
So, the amount of plain flour in the mixture will be: 
lb.
The number of pounds of bread flour and cake flour needed to make the new mixture are 
and 
respectively.
<u>So, the first equation will be</u>: 
The bread flour has 14% plain flour and the cake flour has 7% plain flour.
Thus, the amount of plain flour in bread flour 
lb. and the amount of plain flour in cake flour 
lb.
<u>So, the second equation will be</u>: 
From equation (1), we will get: 
Now substituting this into equation (2) in place of ........
Plugging this 
into equation (1), we will get.....
So, David needs 40 pounds of bread flour and 240 pounds of cake flour.
