• ### Why does math exist?

16 answers · 2 days ago
• ### What is the easiest way to work out this math problem? 3/7 of 5 is the same as 5/7 of 3. Is this statement true or false?

11 answers · 21 hours ago
• ### Hi this is not a joke. my calculator is broken so can you help me figure out 9 plus 10. Thank you?

22 answers · 3 days ago
• ### Can someone help me with this maths question, please?

Best answer: The path of the rocket is y=-4.9t^2+39.2t+h, where y is the height of the rocket at time t s measured from the ground. h is the height of the cliff. (a) After 10 s from start on top of the cliff, the rocket hits the ground=> 0=-4.9(10^2)+39.2(10)+h=> h=98 m (c)... show more
Best answer: The path of the rocket is
y=-4.9t^2+39.2t+h,
where y is the height of the rocket at time t s
measured from the ground. h is the height of
the cliff.

(a) After 10 s from start on top of the cliff, the
rocket hits the ground=>
0=-4.9(10^2)+39.2(10)+h=>
h=98 m

(c) y=-4.9t^2+39.2t+98=>
y'=-9.8t+39.2=0=>
t=4 s is the time needed for the rocket to reach
the max. height after start.

(b) The max. height
H=-4.9(4^2)+39.2(4)+98=>
H=176.4 m

(d) y'=-9.8(10)+39.2=-58.8 m/s
is the speed of the rocket when
hitting the ground.

(e) When the rocket passes by
the top of the cliff,
y=98=>
98=-4.9t^2+39.2t+98=>
t(-4.9t+39.2)=0=>
t=0 or t=39.2/4.9=8 s (when the rocket
bypasses it when coming down).
Ans. 8 s.
4 answers · 2 days ago
• ### What value of x can you use to make x^2+1 zero?

9 answers · 9 hours ago
• ### Math problem?

the sum of a number and its reciprocal is 13/6. Find the number
the sum of a number and its reciprocal is 13/6. Find the number
8 answers · 6 hours ago
• ### If a is subtracted from b, does it mean a-b or b-a?

17 answers · 3 days ago
• ### Salary making \$34.00 an hour working 28 hours a week?

Best answer: Rate x Hours worked x Weeks in a year
34 x 28 x 52 = \$49,504 annually
Best answer: Rate x Hours worked x Weeks in a year
34 x 28 x 52 = \$49,504 annually
11 answers · 2 days ago
• ### Solve the triangle using the Law of Sines?

Best answer: First find Y Y = 180 - (X + Z) Y = 180 - (50 + 42) = 88 degrees Law of sines: a/sin A = b/sin B = C/sin C In your case t will be X/sin X = y/sin Y = z/sin Z x/sin 50 = 14/sin 42 x = (14 * sin 50)/ sin 42 x = 10.725/0.6691 x = 16.03 y/ sin 88 = 14/sin 42 y = (14 * sin 88)/ sin 42 y = 13.991/0.6691 y =... show more
Best answer: First find Y
Y = 180 - (X + Z)

Y = 180 - (50 + 42) = 88 degrees

Law of sines:
a/sin A = b/sin B = C/sin C

In your case t will be
X/sin X = y/sin Y = z/sin Z

x/sin 50 = 14/sin 42
x = (14 * sin 50)/ sin 42
x = 10.725/0.6691
x = 16.03

y/ sin 88 = 14/sin 42
y = (14 * sin 88)/ sin 42
y = 13.991/0.6691
y = 20.91
------------------------------

X = 50 Degrees
Y = 88 Degrees
Z = 42 degrees

x = 16.03
y = 20.91
z = 14.00
7 answers · 1 day ago
• ### How do you work out this maths problem? A team won 1/5 of their matches and drew 1/10 of them. What fraction of matches did they lose?

Best answer: 1/5 + 1/10 = 3/10
Lost 7/10
Best answer: 1/5 + 1/10 = 3/10
Lost 7/10
10 answers · 3 days ago
• ### What is 7813 divided by 13?

7 answers · 1 day ago
• ### How much is 323 split in three ways?

9 answers · 2 days ago
• ### Math question help?

3x=y 3z=x+y x+z+y=9360 x=? y=? z=?
3x=y 3z=x+y x+z+y=9360 x=? y=? z=?
8 answers · 2 days ago
• ### Prove with algebra that the difference between two consecutive odd numbers is always a multiple of 8?

Best answer: You missed the word "squares" in your original title. The smaller odd number can be written as 2n+1, where n is an integer. The larger odd number can be written as 2n+3. Write the difference of the squares. (2n+3)² - (2n+1)² = (4n² + 12n + 9) - (4n² + 4n + 1) = 8n + 8 = 8(n + 1) That's a multiple... show more
Best answer: You missed the word "squares" in your original title.

The smaller odd number can be written as 2n+1, where n is an integer.
The larger odd number can be written as 2n+3.

Write the difference of the squares.
(2n+3)² - (2n+1)²
= (4n² + 12n + 9) - (4n² + 4n + 1)
= 8n + 8
= 8(n + 1)

That's a multiple of 8.
5 answers · 16 hours ago
• ### Factor 9x+16y please?

7 answers · 1 day ago
• ### 1/10 of a number is 11. Find the number.?

5 answers · 3 hours ago
• ### If pi is really a constant as my teacher claims, then how come big circles have greater area than small ones?

Best answer: If A is the area of the circle, then: A = pi × r². (i.e. the area is = pi times the radius and times the radius again)
Bigger circle will have a bigger radius, and thus bigger area, but the value of pi doesn't change.
Best answer: If A is the area of the circle, then: A = pi × r². (i.e. the area is = pi times the radius and times the radius again)
Bigger circle will have a bigger radius, and thus bigger area, but the value of pi doesn't change.
12 answers · 4 days ago
• ### What is the smallest positive nonzero number used in a mathematical concept?

I was thinking about the largest usable number, Graham's number, and wanted to know about the opposite case, and if it was as mind boggling.
I was thinking about the largest usable number, Graham's number, and wanted to know about the opposite case, and if it was as mind boggling.
5 answers · 10 hours ago
• ### Pascal triangle equation?

I couldnt solve these basic ones. I need to know how to solve these so i can do the harder ones. thank you for your time
I couldnt solve these basic ones. I need to know how to solve these so i can do the harder ones. thank you for your time
4 answers · 10 hours ago
• ### Determine A and B so that the curve y=Ax^1/3+Bx^−1/3 has a point of inflection at (1,8).?

5 answers · 11 hours ago