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8090 [49]
4 years ago
8

Ms.Griffith lives on one of the highest floors in her apartment building. The elevator goes up one floor every 10.2 seconds. Alo

ng the way, it stops for a total of 45.8 seconds for people to get out. If it takes her 158 seconds to travel from the lobby to her apartment, what floor does she live on?
Mathematics
2 answers:
Fed [463]4 years ago
7 0
Hey there,
Its the 11th floor.
You take the total of 158 seconds, subtract the 45.8 seconds of mandatory stops which leaves you with 112 seconds. You devide the 112 with 10.2 and your final answer is 11.
rusak2 [61]4 years ago
5 0

Answer:

Ms. Griffiths lives on 3rd floor

Step-by-step explanation:

The elevator moves 10.2 seconds from one floor to another and stops for 45.8 seconds for people to exit. Thus, add: 10.2 seconds + 45.8 seconds = 56 seconds

If it takes her 158 seconds to travel from the lobby to her apartment, then 158 seconds/56 seconds = 2.8 = 3 (approximately).

Therefore, she lives on 3rd floor.

Mathematically, the values ought to be 168 seconds /56 seconds = 3.

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Solve the equation -5(s+30)=-17
zzz [600]

Answer:

s = -133/5 = -26.600 ⬇️

Step-by-step explanation:

Step by step solution :

Step  1  :

Equation at the end of step  1  :

 (0 -  5 • (s + 30)) -  -17  = 0

Step  2  :

Step  3  :

Pulling out like terms :

3.1     Pull out like factors :

  -5s - 133  =   -1 • (5s + 133)

Equation at the end of step  3  :

 -5s - 133  = 0

Step  4  :

Solving a Single Variable Equation :

4.1      Solve  :    -5s-133 = 0

Add  133  to both sides of the equation :

                     -5s = 133

Multiply both sides of the equation by (-1) :  5s = -133

Divide both sides of the equation by 5:

                    s = -133/5 = -26.600

One solution was found :

                  s = -133/5 = -26.600

7 0
3 years ago
6. Find the additive inverse of -7 + 51.<br> -7 - 51<br> 7 + 5<br> 7 - 51<br> -7 + 51
masya89 [10]

Answer:

7 - 51

Step-by-step explanation:

additive inverse : a number that when added to a given number gives zero the additive inverse of 4 is −4 

5 0
3 years ago
The cafeteria is set up for a luncheon. There are 5 rows of tables. There are 5 tables in each row. Each table has a centerpiece
Sholpan [36]
One twenty five 125 :)))
8 0
3 years ago
Rob is saving to buy a new MP3 player. For every $15 he earns babysitting, he saves $10.On Saturday, Rob earned $45 babysitting.
Dmitrij [34]

Answer:

$30

Step-by-step explanation:

Okay, so we can solve this problem using fractions; $10 saved for every $15 made..

10/15=x/45

Using cross multiplication we can conclude 10*45=15x

450=15x

x=30

Hope this helps :)

7 0
2 years ago
Bud's cheeseburger and fries contained 1310 milligrams and 350 milligrams of sodium, respectively. Together they contained 66.4%
Serhud [2]

Answer:

The recommended daily intake of sodium for a 2000 calorie diet is 2500 mg.

Step-by-step explanation:

In order to calculate the daily intake of sodium we first need to calculate the mass of sodium present in both snacks, this is given by their sum.

\text{total sodium} = 1310 + 350 = 1660 \text{ mg}

We can now apply a rule of three for which the total sodium from the snacks is related to 66.4% in the same proportion as "x" mg, which is the value we want to know, is related to 100%. So we have:

\frac{1660}{x} \frac{mg}{mg} = \frac{66.4\%}{100\%}

66.4*x = 1660*100\\x = \frac{166000}{66.4} = 2500 \text{ mg}

The recommended daily intake of sodium for a 2000 calorie diet is 2500 mg.

5 0
4 years ago
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