Answer:
Let x cm be the width of the photograph.
Length of photograph
= (2x-1)cm
Area of photograph
= (2x-1)(x)
= x(2x-1)
= (2x²-x)cm²
(2x²-x)cm²=91cm²
2x²-x=91
x₁=-6.5, x₂=7
Length = 13
Width = 7
Step-by-step explanation:
Given:
length = 2(width) - 1
Area of a Rectangle = lω = 91 cm²
Calculation:
(2ω-1)ω = 91
= 2ω²- ω - 91 = 0
=(2ω+13)(ω-7)=0
ω = -6.5 ω=7
l=2(7) - 1
l = 13
there would be 420 cards in total
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Step-by-step explanation
÷
4b + 22 = 5 (b + 4) - 1 (remove the parantheses)
4b + 22 = 5b + 20 - 1 (calculate)
4b + 22 = 5b + 19 (move the terms)
4b - 5b = 19 - 22 (collect like terms and calculate)
-b = -3 (change the signs)
<em>b = 3</em>
9
9-7= 2
2<3
