5x-14x=9-90
-9x=-81
9x=81
x=81/9
x=9
In what chapter or section in the book do you have problems with? try khan academy it might help
Step-by-step explanation:
16-6=10
because 16.058 rounds down
6.143 rounds down
Answer: 18 cm^2
Step-by-step explanation:
There are four equal triangle and a rectangle.
Formula of a rectangle = b * h = 2*3 = 6
Formula of triangle = but there four of them so we times them by 4, this leaves us with 2 (b * h) = 2(2*3) = 12
Area of pentagon = area of all triangles + rectangle
Area of pentagon = 12 + 6 = 18
Hope this helps.
Answer:
The area of the triangle is : 201.5 cm ²
<h2>
Step-by-step explanation:</h2>
All the sides of an equilateral triangle are equal. A triangle has 3 sides. If the perimeter is 78cm, 78 cm needs to be divided by 3 so find each side of the triangle.
78÷3=26
In order to find the area of a triangle, you need to multiply the base by the height and divide the product by 2.
26×15.5=403
403÷2= 201.5
So therefore, The area of the triangle is : 201.5 cm ²