The total amount of money earned by all three plumbers on monday was $1,400. on tuesday they earned a total of $1,660, and on wednesday, they earned a total of $1,650. on thursday, plumber a made four house calls, plumber b made six house calls, and plumber c made three house calls. how much total money is earned on thursday?

Total money earned on Thursday is $1090.

Step-by-step explanation:

Let amount of money for one house call of Plumber A be x

So, amount of money for 2 house call of Plumber A=2 x

So, amount of money for 4 house call of Plumber A=4 x

So, amount of money for 3 house call of Plumber A=3 x

Let amount of money for one house call of Plumber B be y

So, amount of money for 8 house call of Plumber B=8 y

So, amount of money for 7 house call of Plumber B=7 y

So, amount of money for 9 house call of Plumber B=9 y

Let amount of money for one house call of Plumber C be z

So, amount of money for 8 house call of Plumber C=8 z

So, amount of money for 10 house call of Plumber C=10 z

So, amount of money for 9 house call of Plumber C=9 z

Now we are given that The total amount of money earned by all three plumbers on Monday was $1,400.

On Monday Plumber A has 2 calls , Plumber B has 8 calls and Plumber C has 8 calls

So, equation becomes:  --1

On Tuesday they earned a total of $1,660,On Tuesday Plumber A has 4 calls , Plumber B has 7 calls and Plumber C has 10 calls.

So, equation becomes: ---2

On Wednesday, they earned a total of $1,650.On Wednesday Plumber A has 3 calls , Plumber B has 9 calls and Plumber C has 9 calls.

So, equation becomes: ----3

Solving equation 1 ,2 AND 3

Equation 3:

                    ---4

Now substitute the value of x from 4 in 1 and 2

and

and

--- (a) and ---(b)

Now substitute the value of y from a in b

Substitute the value of z in (a)

Substitute the value of y and z in 1

So, amount of money for one house call of Plumber A = $100

So, amount of money for one house call of Plumber B =$80

So, amount of money for one house call of Plumber C =$70

On Thursday Plumber A made four house calls, Plumber B made six house calls, and Plumber C made three house calls.

So, equation becomes :

Substitute the values of x ,y and z

Thus total money earned on Thursday is $1090.

Hence Option C is correct.

hello!

to begin with, we're given that on earth, a rock weighs 20 pounds, and while on jupiter, that same rock weighs 42 pounds. now, we're trying to find the weight of a rock that weighs 10.5 pounds on earth, on jupiter.

to solve this, first, set up a proportion, cross-multiply, and solve it algebraically.

setting up the proportion is the hardest and the most confusing part of the problem, but it's simple.

if on earth, the rock weighs 20 lbs, and on jupiter it weighs 42 lbs, our first part of our proportion is 20/42 lbs. the second part has to be equal to each other. this means that 10.5 has to be on the numerator of the fraction, and x, the value we're trying to find, has to be on the denominator. remember that the rock weighs 10.5 lbs on earth, and we're trying to find the weight of it on jupiter (which is x).

20/42 = 10.5/x

next, you would cross-multiply.

20x = 42(10.5)

20x = 441

now, solve it algebraically by using division.

x = 22.05 lbs

this can be rounded to 22.1 lbs.

therefore, the weight of the rock on jupiter is 22.1 lbs, the fourth choice.

-3n+2+5n-7=

2n+2-7=

2n-5 (d)