Lessica swing a lap in 29 2/5 martha can swing allowed in 2.8 seconds how much faster can my marta swing allowed in jessica

Given that                                   2

Jessica swing a lap in    29     seconds .

                                                      5

Marta swings in 2. 8 seconds .

We have Jessica time in mixed fraction and Marta time in decimals .

We first covert mixed fraction into improper .

       2               29 * 5 + 2                   145  + 2                 147

29   =        =          =  

         5                     5                                5                      5

                                         147

Thus Jessica time is     .

                                           5

Converting Marta time into fractions .

There is decimal . We have 2.8  seconds .

              28

2.8  =    .

               10

We have two fractions with different denominator .

One is having denominator 5 and another is having denominator 10 .

We need to make the denominator same of both the fractions .

Multiply first fraction (147/5) by 2 in both numerator and denominator to make the denominator 10 .

It become

147 * 2              294      

  =  

5 * 2                     10

Thus we get denominator of both the fractions same .

Jessica time is 294/10  and Marta time is  28/10 seconds .

Marta taking less time . She is faster .

Difference

294            28                    266

   -       =     seconds .

10                10                     10  

Converting to decimal , we get 26.6 seconds .

Marta is faster by 26.6 seconds .            

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3