Answer:
3
Step-by-step explanation:
substitute where x=3 into the equation
so 4*3-1=11
Cross multiplication!

=

7 × 24 = 8x
168 = 8x
Divide both sides by 8 to isolate x

=

8 and 8 cancels out
21 = x
Answer : 12.56 inches²
Explanation :
Diameter is twice the radius.
Radius = 4 ÷ 2 = 2 inches
Area = 3.14r² = 3.14 × 2² = 12.56 inches²
Answer:
Hiiiii
The answer is 4 + 2 + 7= 13
Sorry if it incorrect
Have a nice day