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3 years ago

In the equation -2(2-r)=4(5-r) what is r?

Mathematics

1 answer:

valina [46]3 years ago

8 0

$-2(2-r)=4(5-r)\\
-4+2r=20-4r\\
6r=24\\
r=4$

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. On a school field trip, the school requires that there are 6 teachers for every 90 students. If 135 students attend the trip h

mr_godi [17]

Answer:

For 135 students , the number of teacher requires is 9

Step-by-step explanation:

Given as :

The number of teacher = 6

The number of student = 90

∵ For 90 students , the number of teacher requires = 6

So , For 1 student , the number of teacher requires = $\frac{6}{90}$

= $\frac{1}{15}$

∴ For 135 student , the number of teacher requires = $\frac{1}{15}$ ×135

Or, For 135 student , the number of teacher requires = $\frac{135}{15}$

So, For 135 student , the number of teacher requires = 9

Hence For 135 students , the number of teacher requires is 9 Answer

5 0

3 years ago

Troy signed up for a new cell phone plan which charges him a fee of $40 per month, plus $0.05 for each text message that he send

nataly862011 [7]

He can send 600 messages.
40+0.05x=70
-40+0.05x=70-40
0.05x=30
So divide 30 by 0.05
and you get 600.

5 0

3 years ago

HELP ME PLSSSSS I NEED HELP PLS PLS PLS ITS PYTHAGOREAN THEOREM

sergij07 [2.7K]

H=9ft
B=6ft

Using Pythagorean thereon

$\\ \Large\sf\longmapsto P^2=H^2-B^2$

$\\ \Large\sf\longmapsto P^2=9^2-6^2$

$\\ \Large\sf\longmapsto P^2=81-36$

$\\ \Large\sf\longmapsto P^2=45$

$\\ \Large\sf\longmapsto P=\sqrt{45}$

$\\ \Large\sf\longmapsto P=6.3ft$

7 0

3 years ago

If there is 100 students how much would 40% be

I am Lyosha [343]

Answer: 40 students.

Step-by-step explanation:

To solve this problem you mmust apply the steps shown below:

1. You know that there is a total of 100 students, then you can say that the 100% is 100 students.

2. Then, to calculate how much would 40% be, you must multiply 100 students by 40% which you rewrite as a decimal by dividing it by 100, as following:

40%/100=0.4

Then 40% of the students would be

100 studens*0.4=40 students

3 0

3 years ago

Read 2 more answers

Graph the line with the equation y=1/3x+1

devlian [24]

Answer:

See photo

Step-by-step explanation:

$\frac{1}{3}$ = $\frac{rise}{run}$

1 = slope intercept

6 0

3 years ago