(5/9 multiplied by -4) + (3/4 multiplied by -6) is ? Please please help ill give brainiest!!

- 6 13/18

Step-by-step explanation:

5/9 times -4 is -20 over 9     -20/9     -2 2/9

3/4 times -6 is -18 over 4     -18/4         -4 1/2

You need them to have a common denominator

so you can multiply the first answer by 4 and the second by 9.

You get -242/36 after a while

and then

you simplify.

You can multiply 36 six times  into -242 so you get the whole number of 6 plus 216

242-216 is 26

26 over 36 is 13 over 18

-6 13/18

For this case, the first thing we must do is define variables.

We have then:

x: number of pennies

y: number of dimes

z: number of quarters

We now write the system of equations:

the box containts 44 coins:

The number of pennies is equal to the number of dimes:

the total value is $ 4.37:

Solving the system of equations graphically, we obtain:

Let's rewrite equations 1 and 2:

The intersection of the straight lines is the graphic solution

Note: see attached image

x = 17

z = 10

Then, the value of y is:

y = x = 17

pennies = 17

dimes = 17

Quarters = 10