ilianysacosta10
18.01.2021 •
Mathematics
Expand and simplify (
+3)(4x+5)-8x(
-2)
Solved
Show answers
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Ответ:
2x(5x + 14) + 15
Step-by-step explanation:
Given: (2
+ 3)(4x + 5) - 8x(
- 2)
(2
+ 3)(4x + 5) - 8x(
- 2) = 2
(4x + 5) + 3(4x + 5) - 8x(
- 2)
= (8
+ 10
+ 12x + 15) - 8
+ 16x
= 8
+ 10
+ 12x + 15 - 8
+ 16x
collecting like terms to have,
8
- 8
+ 10
+ 12x + 16x + 15
10
+ 28x + 15
Thus,
(2
+ 3)(4x + 5) - 8x(
- 2) = 10
+ 28x + 15
= 2x(5x + 14) + 15
Ответ:
Step-by-step explanation:
Find the area of the triangle sides
Area of a triangle: (1/2)bh
b-base
h-height
(1/2)x2x2=2
Multiply by the number of that type of side
2x2=4
Find the height of the rectangles
1+4=
5=
c=2.2
Find the area of the rectangles
Area of a rectangle: base times height
2.2x3=6.6
Multiply by the number of rectangles
6.6x2=13.2
Find the area of the bottom rectangle
2x3=6
Add the totals together
4+13.2+6=23.2
So the closest value would be 22