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Contact [7]
3 years ago
11

How many 12 inch rulers would be the same length as a door

Mathematics
1 answer:
Nataly_w [17]3 years ago
5 0
Mostly doors are is 5 ,12 inch rulers long
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erics cell phone service costs $40.00 a month for unlimited calls. he also pays $0.02 for each text message he sends. what equat
KatRina [158]

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

3 0
3 years ago
The wall is 4m long and 3m board.If it has volume of 720000cm.find the height of the wall​
OLEGan [10]

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

6 0
3 years ago
How do you prove that two lines are parallel
Pani-rosa [81]

Answer:

they are side by side but not intersect

3 0
3 years ago
Read 2 more answers
May I please receive help?
weeeeeb [17]

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

4 0
2 years ago
Please, I NEED HELP. Anyone?
olchik [2.2K]

Answer:  

<em>(a) The system that models the situation:   b+c= 280 and 0.14b+0.07c= 22.4</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:  (280*0.08)lb.= 22.4 lb.

The number of pounds of bread flour and cake flour needed to make the new mixture are b and c respectively.

<u>So, the first equation will be</u>:   b+c= 280 ...................................(1)

The bread flour has 14% plain flour and the cake flour has 7% plain flour.

Thus, the amount of plain flour in bread flour =0.14b lb. and the amount of plain flour in cake flour = 0.07c lb.

<u>So, the second equation will be</u>:   0.14b+0.07c= 22.4 ................................(2)


From equation (1), we will get:   b= 280-c

Now substituting this b= 280-c into equation (2) in place of b........

0.14(280-c)+0.07c= 22.4\\ \\ 39.2-0.14c+0.07c=22.4\\ \\ -0.07c=22.4-39.2\\ \\ -0.07c=-16.8\\ \\ c=\frac{-16.8}{-0.07}=240

Plugging this c=240 into equation (1), we will get.....

b+240=280\\ \\ b=280-240=40

So, David needs 40 pounds of bread flour and 240 pounds of cake flour.

7 0
3 years ago
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