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4 years ago

Evaluate the following expression 2(1,0) -3(2,-1) A-(2,3) B-(-4,3) C-(-3,-2) D-(2,3)

Mathematics

2 answers:

Liono4ka [1.6K]4 years ago

6 0

Answer:

(-4,3)

B is the correct option.

Step-by-step explanation:

We have been given the expression 2(1,0) -3(2,-1)

On distributing 2 and -3 over the parentheses, we get

(2×1,2×0)+(-3×2,-3×(-1))

On simplifying, we get

(2,0)+(-6,3)

Now, adding, we get

(2-6,0+3)

On simplifying, we get

(-4,3)

B is the correct option.

marusya05 [52]4 years ago

5 0

The answer is B, (-4,3)

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The braking distance at 55 mph, is approximately 298.35 ft.

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Reason:

The given function for the braking distance is D = 2.6 + v²/22

a. The braking distance if the car is going 25 mph is therefore;

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At 25 mph, the braking distance is approximately 63.7 ft.

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55 mph = 80.65945 ft.s

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At 55 mph, the braking distance is approximately 298.35 ft.

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At 85 mph, the braking distance is approximately 708.92 ft.

b. The speed of the car when the braking distance is 450 feet is given as follows;

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v = √(9842.2) ≈ 98.211 ft./s

The car was moving at v ≈ 98.211 ft./s

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