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Tom [10]
3 years ago
15

Subtract. -21 - (-13)

Mathematics
2 answers:
Daniel [21]3 years ago
8 0

Answer:

-8

Step-by-step explanation:

-21 - (-13)is the same as -21+13, so the answer is -8.

Burka [1]3 years ago
3 0

Answer:

-8

Step-by-step explanation:

-21-(-13)

=-21+13

=-8 is the answer......

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E=mc²<br>solve for m <br>McGraw-Hill algebra 2 book page 23 question 45<br>thanks in advance ​
Brums [2.3K]

Answer:

m = E/c²

Step-by-step explanation:

E = mc²

mc² = E

Divide both sides by c².

m = E/c²

3 0
1 year ago
It takes 85 pails of water to fill up a tank. If the capacity of each pail is 2.65 gallons , what ai the capacity of the tank?
Taya2010 [7]
If u multiply the amount of gallons the pail holds by the amount of pails the tank can hold you would get 225.25 gallons.

6 0
3 years ago
Given interest of $10,510 at 12 percent for 30 days one can calculate the principal as:
gtnhenbr [62]

Answer:

$1,065,597.22

Step-by-step explanation:

Simple interest = Principal * Rate * Time/100

10,510 = P * 12 * 30/365*100

10,510*365*100 = 360P

383,615,000 = 360P

Note that the time was converted to years by dividing by 365

P = 383,615,000/360

P = $1,065,597.22

Hence the principal is $1,065,597.22

7 0
3 years ago
A right rectangular prism has edges of 2 1/4 in, 1 1/2 in and 1 1/2 in. How many cubes with lengths of 1/4 in would be needed to
Zielflug [23.3K]

The volume of a rectangular prism is (length) x (width) x (height).

The volume of the big one is  (2.25) x (1.5) x (1.5) = <em>5.0625 cubic inches</em>.

The volume of the little one is  (0.25)x(0.25)x(0.25)= 0.015625 cubic inch

The number of little ones needed to fill the big one is

             (Volume of the big one)  divided by (volume of the little one) .

       5.0625 / 0.015625  =  <em>324 tiny cubies</em>

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

Doing it with fractions instead of decimals:

The volume of a rectangular prism is (length) x (width) x (height).
Dimensions of the big one are:

   2-1/4  =  9/4
   1-1/2  =  3/2
   1-1/2  =  3/2

   Volume = (9/4) x (3/2) x (3/2) =
 
                 (9 x 3 x 3) / (4 x 2 x 2)  =

                           81 / 16  cubic inches.

          As a mixed number:    81/16  =  <em>5-1/16 cubic inches</em>

Volume of the tiny cubie = (1/4) x (1/4) x (1/4) =  1/64 cubic inch.   

The number of little ones needed to fill the big one is

             (Volume of the big one)  divided by (volume of the little one) .

                 (81/16) divided by (1/64)  = 

                     (81/16) times (64/1)  = 

                             5,184/16  =  <em>324 tiny cubies</em>.


5 0
3 years ago
Select the better deal in the pair. Then give the unit rate for the better deal.
nydimaria [60]
2 one do you need explanation ??
8 0
3 years ago
Read 2 more answers
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