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Reptile [31]
3 years ago
11

Number 79 Physics The velocity of the ball

Mathematics
1 answer:
Harrizon [31]3 years ago
3 0

Answer:

  (a)  16 ft/s

  (b)  1.5 s

Step-by-step explanation:

(a) Put 1 where t is in the expression and do the arithmetic:

  -32×1 +48 = 16 . . . . feet per second

__

(b) Use the hint and solve for t:

  -32t +48 = 0

  t -1.5 = 0 . . . . . divide by 32

  t = 1.5 . . . . . . . . add 1.5

The ball reaches its maximum height after 1.5 seconds.

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Give the equation of the line perpendicular to y +7= -2(x - 6) through the<br> point (6,-3)
lilavasa [31]

<u>Note: this answer assumes the equation of the line can be put in slope-intercept form. </u>

Answer:

y + 3 = \frac{1}{2}(x-6)

Step-by-step explanation:

1) First, find the slope of y + 7 = -2 (x - 6). We can see that it's already in point-slope form, or y-y_1 = m (x-x_1) format. Remember that the number in place of the m is the slope. Therefore, -2 is the slope of that equation.

What we need is the slope that is perpendicular to that, though. So, find the opposite reciprocal of -2. To do this, change its sign, convert it into a fraction (-\frac{2}{1}), and flip its numerators and denominators. Therefore, the perpendicular slope would be \frac{1}{2}.

2) Now that we have a slope and a point the line passes through, we can write an equation using the point-slope formula, y-y_1 = m (x-x_1). In order to write an equation, the x_1, y_1, and m have to be substitute for with real values.

The m represents the slope. We already calculated that in the last step, so put \frac{1}{2} in place of the m. The x_1 and y_1 represent the x and y values of a point the line passes through. We know that the line has to pass through (6, -3), so substitute 6 for x_1 and -3 for y_1:

y - (-3) = \frac{1}{2}(x -(6))\\y + 3 = \frac{1}{2}(x - 6)

Therefore, (again, assuming that the line can be put in point-slope form) the answer is y + 3 = \frac{1}{2}(x-6).

5 0
3 years ago
Please help! What are the piecewise functions for this graph? Which means, what is d(t)?​​
Anna11 [10]

Answer:

idk

Step-by-step explanation:

6 0
3 years ago
Write [2(cos15*+isin15*)]^3 in standard form a+bi
Marysya12 [62]
Hello : 
by moivre theorem : 
[2(cos15*+isin15*)]^3 = 2^3(cos(3×45*)+isin(3×45*))
                                   =8 (cos45*+isin45*)
                                   = 8 ( √2/2 +i √2/2)
                                   = 4√2 + 4√2 i ..... ( <span>in standard form a+bi)
</span>a = b = 4√2 
8 0
3 years ago
Read 2 more answers
The line passing through (-4,6) and parallel to the line y=3x+8
Allisa [31]
<span>y=3x+8
if it's parallel to this line, then the slope will also be 3.

slope = 3
</span><span>x</span>₁ = -4
<span>y</span>₁ = 6
<span>
</span><span>for this question, we use point-slope
y - y</span>₁ = m(x - x₁)

y + 4 = 3(x - 6)
y + 4 = 3x - 18

y = 3x - 14
this is your equation
6 0
3 years ago
What is the second equation??
navik [9.2K]
It’s going to be x+y=73
8 0
3 years ago
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