The circumfrence of a ball is 60cm. The ball rolls 16.2m. How many times does the ball make one complete roll?

Answers

Answer 1

Answer: $1 roll=circumference$

$(distance)/(circumference) =rolls$

$(16.2m)/(60cm) =rolls$

$((16.2*100)cm)/(60cm) =rolls$

$(1620cm)/(60cm) =rolls$

$27 = rolls$

$27times$

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Please help me with these questions

Answers

Besides posting the answers, I also included the solution to solve similar simplification of algebraic expressions questions. :)

What is 19 percent of 72

Answers

To find 19% of 72 you would multiply 72x.19.
72x.19=13.68
19% of 72 is 13.68

To do this multiply 72 by 0.19. This will give you 13.68.

I recently took a test in my Algebra 1 class. This was on the test (that I most likely failed)and it said something about vertical motion. The problem is below. Try to solve it, please! Thanks!2=-t^2+4+5

Answers

OK.    2 = -t² + 4t + 5

Subtract 2 from each side: 0 = -t² + 4t + 3

Multiply the right side by -1 : 0 = t² - 4t - 3

Unfortunately, this can't be factored. The only other way I know
to find the solutions to a quadratic equation is with the use of the
quadratic formula. When you do that, you get these solutions:

   t = 2 + √7 = about 4.65
and
   t = 2 - √7 = about -0.65 .

If this equation comes from a problem that involves real people throwing
real things into the air and making vertical motion, then you want only the
positive solution.

#5 Find the unit rate of the
tuation below.
ou run 12 miles in 2 hours

Answers

Answer:

6 miles per hour

Step-by-step explanation:

12 ÷ 2= 6

Identify the equation of the graph

Answers

This has a vertex at (1,-5) and otherwise looks like y=x^2; the two points one x unit away from the vertex are also 1 y unit away, the two points two away are 4 units higher, etc.

$y = (x- 1)^2 - 5$

That's in vertex form. We're not shown any choices; let's multiply this out.

$y = x^2 - 2x - 4$

Either one of those.

Write each rational numbe as a fraction

Answers

well a fraction is a/b and all whole numers (exg 1,2,3,4,5,1.5) are all over 1 so
1=1/1
2=2/1
3=3/1
6.3=6.3/1

lets say that you have 0.22 that would be 22/100
0.2=2/10
0.23=23/100
1.34=134/100
4.32=432/100
4.843=4843=4843/1000

so lets say that you have 9/4
that would be (2 fours in 9 so) 2 and 1/4 so to go back just multiply the '2' by the denomenator (bottom number or in this case it is 4) so 2*4=8 then add that to the top number so 1+8=9
9/4
very simple so
3. -15=-15/1
4. 0.31=31/100
5. 4 and 5/9= (4 times 9=36 so 36+5=41) 41/9
6. 6.2=62/10

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