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:

answer:   rotate 270° clockwise about (7, 1) and reflect across the line x = 7

step-by-step explanation:

because i took test

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet