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FinnZ [79.3K]
3 years ago
11

Solve each system of equations. 5x + 5y = 3 5x – 3y = 27

Mathematics
1 answer:
Mademuasel [1]3 years ago
4 0

Answer:


Step-by-step explanation:

You basically minus the x's

Then get your equation e.g a +b+c=.....

Then find x on its own e.g 2x=4

X= 2

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the sum of three numbers is 2100. the first number x is equal to the sum of the other two (y and z) which are equal to each othe
max2010maxim [7]
We will have a system of equations, and we are going to solve it by using substitution.
Let's make the equations.
x+y+z=2100
z+y=x
Since y and z are equal, I think it is easier for us to have them as one variable for now. Let the value of z and y be a.
These are the equations now.
x+2a=2100
2a=x
Since the second equation is giving the value of x, let it replace the value of x also in the first equation.
2a+2a=2100
4a=2100
2100÷4= 525
so, x and y equal 525. Let's put this in our original equation.
x+525+525=2100
x+ 1,050= 2,100
x= 1,050
So, x=1,050, y= 525 =z.

7 0
3 years ago
Below are two different functions, f(x) and g(x). What can be determined about their slopes? f(x) Dawn writes 800 pages in 80 da
lilavasa [31]
Given function f(x) which is described by "<span>Dawn writes 800 pages in 80 days".

From this function we can notice that Dawn writes 0 pages in 0 days, (i.e. the initial point of the function is point (0, 0).

Recall that the slope, m, of a line passing through points:
(x_1,y_1) and (x_2,y_2)
is given by
m= \frac{y_2-y_1}{x_2-x_1}

Function f(x) passes through points (0, 0) and (80, 800).

Thus the slope of function f(x) is given by
m= \frac{800-0}{80-0} = \frac{800}{80} =10


Give function g(x), passing through points (2, -6) and (4, 12), the slope is given by
m= \frac{12-(-6)}{4-2} = \frac{12+6}{2} = \frac{18}{2} =9

It can be seen that the slope of f(x) and the slope of g(x) are close.
</span>
7 0
3 years ago
3 9/12 + (4 7/12 + 5/12) = 3 9/12 + ____?
Maru [420]

Answer:

5

Step-by-step explanation:

4 7/12 + 5/12 = 4 12/12 which equals 5

8 0
3 years ago
Read 2 more answers
. Melissa wants to check the accuracy of the finance charge on her promissory
masha68 [24]

Answer:

A

Step-by-step explanation:

Idek.

5 0
3 years ago
What is w-4&gt;9 written on a number line?
Aleksandr-060686 [28]
There would be an open circle on positive 12 with the arrow moving to the right.
7 0
3 years ago
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