The math department is putting together an order for new calculators. The students are asked what model and color they prefer.
Model 55 Model 66 Model 77 Total
Black 0.10
0.40
0.30
0.80
Silver 0.03
0.07
0.10
0.20
Total 0.13
0.47
0.40

there are many solutions.

step-by-step explanation:

step 1: simplify both sides of the equation.

4x+6=4x^2+10x−4

step 2: subtract 4x^2+10x-4 from both sides.

4x+6−(4x^2+10x−4)=4x^2+10x−4−(4x^2+10x−4)

−4x^2−6x+10=0

step 3: factor left side of equation.

−2(2x+5)(x−1)=0

step 4: set factors equal to 0.

x=-5/2 or x=1

12cm

the answer is d

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step-by-step explanation:

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