The first option is correct I did this before hope this helps
Answer:
204.2 cm
Step-by-step explanation:
equilateral means all sides are of equal length.
the perimeter of such a triangle is simply 3 times one of these sides.
so,
612.6 = 3×0.2×(10x + 90) = 0.6×(10x+90) = 6x + 54
6x = 558.6
x = 93.1
so, a single side is
0.2×(10×93.1 +90) = 0.2×(931 + 90) = 0.2×1021 = 204.2 cm
to check
3×204.2 = 612.6 = the original perimeter.
so, correct.
=7/(32+10)÷1/(36×36)×9/(6×9)
=1/6×1296×1/6
=9
The solution of the equation after solve the equation, 2x − 3 4x = 21 is 4. Option 3 is correct.
<h3>How to obtain the solution of equation?</h3>
To obtain the solution of an equation, the similar terms should be arranged together and then mathematical operation need to be performed to simplify it.
The equation which is provided to solve is,

To solve this equation, arrange the like terms as,

Add number 3 both side of the equation as,

Divide both side of the equation with number 6, we get,

Hence, the solution of the equation after solve the equation, 2x − 3 4x = 21 is 4. Option 3 is correct.
Learn more about the solution of the equation here;
brainly.com/question/21283540
1) 1hour 10minutes =

hours,
50 minutes =

hours
2) speed of plane against the wind =

3) speed of plane on the the wind =

4) (336-240):2=48miles/hours - speed of wind
5)336-48=288miles/hours - plane's speed <span>in still air
Answer: speed of wind is 48 miles/hours, speed of </span>plane in still air is 288 miles/hours