840 = 1×840=2×420 = 3×280 = 4×210 = 5×168 = 6×140 = 7×120 = 8×105
4220=1×4220 = 2×2110 = 4×1055 = 5×844
2840 = 1×2840 = 2×1420 = 4 × 710 = 5 × 568 = 8 × 355
Answer:8
Step-by-step explanation:
Answer:
2x -16
Step-by-step explanation:
The area of each rectangle is the product of its length and width. The shaded area is the difference between the areas of the outside rectangle and the inside rectangle.
shaded area = (2x -1)(x +6) -(2x +5)(x +2)
= (2x^2 +11x -6) -(2x^2 +9x +10)
= (2 -2)x^2 +(11 -9)x +(-6 -10)
= 2x -16 . . . . . area of the shaded region
X ·( x + 1 ) = 600
x² + x = 600
x² + x - 600 = 0
x = ( - 1 - 49 ) / 2 = - 50 : 2 = - 25
x = - 25, x + 1 = - 24
( - 25 ) · ( - 24 ) = 600
Answer:
C ) - 25
Congruent because you can map the triangles using a reflection across the y-axis which is a rigid motion