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vova2212 [387]
2 years ago
14

Pls help! Error Analysis problem

Mathematics
2 answers:
Gennadij [26K]2 years ago
7 0

Answer:

Ana made a mistake from line 2 to 3

Step-by-step explanation:

charle [14.2K]2 years ago
6 0

Answer:

Ana made a mistake from line 2 to 3

Step-by-step explanation:

From line 2 to 3, on the left side, ana <u>added</u> 2 and 3 but completely ignored the - in front of the 3. the correct answer would have been<u> -x - 21 = 3x + 19</u>

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A diving board is 10 feet above the surface of the water. At time t = 0, the board propels Chris upward at a rate of 12 feet per
Art [367]

Answer:

Chris will take 0.75 seconds to return to his starting height of 10 feet.

Step-by-step explanation:

Let the height of Chris be represented by h(t) = -16\cdot t^{2}+12\cdot t +10, where h(t) is the height in feet and t, the time in seconds. First, we equalize the formula to a height of 10 feet and simplify the resulting expression, that is:

-16\cdot t^{2}+12\cdot t +10 = 10

-16\cdot t^{2}+12\cdot t = 0

Then, we simplify the expression by algebraic means:

-16\cdot t\cdot \left(t-\frac{3}{4} \right) = 0

Roots of the polynomial are, respectively:

t = 0\,s\,\lor \,t = 0.75\,s

First root represents the initial height of Chris, whereas the second one represents the instant when Christ returns to the same height above the surface of the water. Hence, Chris will take 0.75 seconds to return to his starting height of 10 feet.

5 0
3 years ago
Please solve will give BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINL
Mnenie [13.5K]

Answer:

3.4

Step-by-step explanation:

7 0
3 years ago
How would you describe a meter in English units?
dalvyx [7]
The answer is letter A. A meter has nearly the same value to a yard, one yard approximately amounting to 1.09361 meter. The rest of the other measures are far from meter's value in distance.

Thank you for posting your question. I hope you found what you were after. Please feel free to ask me more.

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5 0
3 years ago
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MrRa [10]

2.   Using the external angle of a triangle theorem.

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= 45 degrees   answer

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2:1  


3 0
3 years ago
Circumference of a circle
solmaris [256]

Answer:

50.27 units

Step-by-step explanation:

The formula for the circumference of a circle is:

C = \pid

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C = \pi16

C = 50.27

3 0
3 years ago
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