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Liula [17]
4 years ago
14

What's (2/5) x-8=9-(3/5)

Mathematics
1 answer:
Alina [70]4 years ago
8 0

Answer:

41

Step-by-step explanation:

(2/5) x - 8 = 9 - ( 3/5 )

First you need to multiply everything with inversely proportional number of  2/5 to get x alone.

(2/5) x - 8 = 9 - ( 3/5 )  / × 5/2

x - (8 × 5/2) = 9 × 5/2 - (3/5 × 5/2)

x - 40/2 = 45/2 - 15/10

Now you switch 40/2 on the other side, but when you do this, you need to change it's sing (minus to plus). We do that so x can be alone on one side.

x = 45/2 - 15/10 + 40/2, contracted, it look like this:

x = 22,5 - 1,5 + 20

and  x = 41

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The answer and the work
crimeas [40]

Answer:

x=1

Step-by-step explanation:

Substitute the value of y to the first given

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5 0
3 years ago
The population at Bishop High School is 2000 students in 2011. Every year the population decreases by 50 students
Artemon [7]

Answer:

  • Let p be the population at t be the number of years since 2011.  Then, p=2000-50t
  • The projected population of the high school in 2015=1800
  • In <u>2019</u> the population be 1600 students

Step-by-step explanation:

Given: The population at Bishop High School students in 2011 =2000

Also,  Every year the population decreases by 50 students which implies the rate of decrease in population is constant.

So, the function is a linear function.

Let p be the population at t be the number of years since 2011.

Then, p=2000-50t

So at t=0, p=2000

In year 2015, t=4, substitute t=4 in the above equation ,we get

p=2000-50(4)\\\Rightarrow\ p=2000-200\\\Rightarrow\ p=1800

Hence, the projected population of the high school in 2015=1800

Now, put p=1600 in the function , we get

1600=2000-50t\\\Rightarrow50t=2000-1600\\\Rightarrow50t=400\\\Rightarrow\ t=\frac{400}{50}\\\Rightarrow\ t=8

Now, 2011+8=2019

Hence, in <u>2019</u> the population be 1600 students




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3 years ago
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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The cost of labor per hour is $95.

6 0
3 years ago
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