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murzikaleks [220]
3 years ago
15

What is the value of the expression? Drag and drop the answer into the box to match the expression. 0.9(1/2−2)+0.6

Mathematics
2 answers:
arsen [322]3 years ago
8 0
Just use pemdas....
-0.75 is the solution.

 distributed the 0.9 to the .5 converted fraction to decimal and the 2,  keep the parenthesis and subtract the 0.45 with the positive 1.8 which equals -1.35. Then add-1.35 to 0.6 and then you get -0.75 is the solution.


mrs_skeptik [129]3 years ago
6 0
Should be, -0.7, if you follow PEMDAS
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Step-by-step explanation:

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As the bridge have the shape of an inverted parabola, so the standard equation, which describes the shape of the bridge is

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Maximum height of the bridge= 40 feet.

The coordinate where the bridge meets the base is A(83, -40) and B(-83, -40).

There is only one constant in the equation of the parabola, so, use either of one point to find the value of a.

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The point P_1(10,-1.72225) and P_2(-10,-1.72225) represent the point on the bridge at a distance of 10 feet from its center.

The distance of these points from the x-axis is d=1.72225 feet and the distance of the base of the bridge from the x-axis is h=40 feet.

Hence, height from the base of the bridge at 10 feet from its center

= h-d

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