Four times the sum of a number r and 4 is equal to 20 less than 10 times the number r. what is the value of r?

Step-by-step explanation:

The sum of

(prepare to add)

four times a number and 10 is equal to

 4      *          x           +   10        =

the difference of

(prepare to subtract)

twice the number and 8.

    2x                    -  8

Putting it all together:

4x + 10 = 2x - 8

Try it from here; let me know if you need additional help.

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%

536

step-by-step explanation: