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3 years ago

What is the properties of 0 + (-7) = -7 +0

Mathematics

1 answer:

Hunter-Best [27]3 years ago

7 0

The answer is -7 = -7

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There are 620 students and 31 teachers at the Turner Middle School.There are 950 students and 38 teachers at the Green Middle Sc

kicyunya [14]

We begin with the Turner Middle School:
Ratio of students to teachers: $\frac{620}{31}$
Green Middle School:
Ratio of students to teachers: $\frac{950}{38}$
Let check that we cannot form a proportion:
$\frac{620}{31}=20\text{ and } \frac{950}{38}=25$
The two ratios are not equals so we cannot form a proportion.
Let x be the number of teachers that Green have to hire in order to make the two ratios equal. We get the equation:
 $\frac{950}{38+x}=\frac{620}{31}\text{ and we solve the equation like this:}\\38+x=\frac{950\times31}{620}=47.5 \text{ and then:}\\x=47.5-38=9.5$

The Green school need to hire 9 teachers.

Part-to-whole ratio:
Turner Middle School:
$\frac{620}{31+620}$
Green Middle School:
$\frac{950}{38+950}$

8 0

3 years ago

Read 2 more answers

Mark, Bridget and Sushil share £14 in a ratio 2:3:2. How much money does each person get?

icang [17]

Answer:

Mark = 4, Bridget = 6, Sushil = 4

Step-by-step explanation:

You can add up all of the ratios, which is 7, and do 14/7 to find how much each ratio has in terms of money. So if someone had a ratio of 1, they would get a dollar, and since Mark and Sushil has 2, they get 4 dollars. (I'm American Sorry.)

5 0

2 years ago

At an amusement park, only 18 peopel are allowed on a ride at the same tome. There are 157 people waiting in line. Hiw many grou

Bond [772]

Answer:

8 groups

Step-by-step explanation:

just keep taking away 18 till u can't anymore

your welcome

6 0

3 years ago

Read 2 more answers

CAN SOMEONE PLEASE HELP ASAP!?? I RLLY NEED THIS

Sindrei [870]

Answer:

109 degrees

Step-by-step explanation:

Since we can see that the line on the top, the one across the yellow box, is the main one, and that one measures 180*, so that means that we have to just subtract 180 by 71, and that will be our answer!

180-71 =109

So, the angle of the missing angle is 109 degrees.

Another proof that this is your answer is that 109 degrees is obtuse, and we can easily say that the angle here is also obtuse.

3 0

2 years ago

3/5 divided by 1/3 please say how you get that answer

kodGreya [7K]

3/4 divided by 1/5 = 3 3/4

Hope that helps :)

6 0

3 years ago