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meriva
2 years ago
6

A ball is projected with velocity 10m/s at an angle of 30 degrees with the horizontal surface . The time taken by the ball to re

ach the ground is ... g=10
Mathematics
1 answer:
Tresset [83]2 years ago
7 0

The ball's vertical position in the air is given by

y=10\cos30^\circ\,t-\dfracg2t^2

and it will reach the ground at t for which y=0:

0=5\sqrt3\,t-5t^2=5t(\sqrt 3-t)\implies t=\sqrt3\approx1.73

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If the coefficient a in the general quadratic equation is equal to 9, what is the focal length for the
lutik1710 [3]

Answer:

9

Step-by-step explanation:

Let the equation of a parabola be

y^{2} = 4ax.

Then , focal length of the parabola is a.

As , (0,0) is the vertex and its focus is (a,0)

Thus, focal length comes out to be a.

Here,

a is given as 9 units .

Thus focal length of the parabola, d, equals to 9 units

5 0
2 years ago
2008 population of wyoming was counted as 532,668 people. what is a reasonable estimate of the population of wyoming?
Snezhnost [94]
The smaller is the rounding factor, the more accurate the estimation is

532668 rounded to the nearest ten is 532670
532668 rounded to the nearest hundred is 532700
532668 rounded to the nearest thousand is 533000
532668 rounded to the nearest ten thousand is 530000
532668 rounded to the nearest hundred thousand is 500000

We can use either 532700 or 533000 as a reasonable estimate because these values don't give much difference to the original value
8 0
3 years ago
Find the greatest common factor of x^2y and xy^2
Dimas [21]
1. Find the H.C.F. of 4x2y3 and 6xy2z.
Solution:
The H.C.F. of numerical coefficients = The H.C.F. of 4 and 6.
Since, 4 = 2 × 2 = 22 and 6 = 2 × 3 = 21 × 31
Therefore, the H.C.F. of 4 and 6 is 2
6 0
3 years ago
A school population was predicted to increase by 50 students a year for the next 10 years. If the current population is 700 stud
antoniya [11.8K]

The enrollment number should be 1200

5 0
2 years ago
What is the equation of a line that passes through the point?
Artist 52 [7]
<h3>Answer: 3x-2y = 5 (choice A)</h3>

=====================================================

Explanation:

The given graph passes through (0,2) and (2,5)

The slope of this line is

m = (y2 - y1)/(x2 - x1)

m = (5-2)/(2-0)

m = 3/2

Since the y intercept is b = 2, we go from y = mx+b to y = (3/2)x+2, which is the equation of the graphed line shown.

Any parallel line will have the same slope, but a different y intercept.

-------------------

The parallel line must pass through (x,y) = (3,2). We'll use these coordinates along with m = 3/2 to find the y intercept b

y = mx+b

2 = (3/2)(3)+b

2 = 9/2+b

2-9/2 = b

4/2 - 9/2 = b

-5/2 = b

b = -5/2 ... is the new y intercept

The equation of the parallel line is y = (3/2)x-5/2, which is in slope intercept form

-------------------

Let's convert to standard form

y = (3/2)x-5/2

2y = 3x-5 .... multiply everything by the LCD 2 to clear out fractions

2y+5 = 3x

3x = 2y+5

3x-2y = 5 ... is the equation in standard form of the parallel line

-------------------

As a check, we can plug (x,y) = (3,2) into that last equation above to get

3x-2y = 5

3*3-2*2 = 5 ... replace x with 3, replace y with 2

9-4 = 5

5 = 5

Confirming that (x,y) = (3,2) is on the line.

3 0
3 years ago
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