If 3 times a certain number is increased by 4 the result is 28 what is the number

The number is 8

Step-by-step explanation:

 Let be "x" the certain number. Then "3 times a certain number" means that the number "x" is multiplied by 3. This is:

Now, "3 times a certain number is increased by 4" means that the we must add 4 to , in other words, this indicate an addition:

And finally "3 times a certain number is increased by 4 the result is 28" means that   is equal to 28. Then the expression is:

To find the number "x", subtract 4 from both sides of the equation:

Dividing both sides of the equation by 3, you get that the number is:

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

step-by-step explanation:

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