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RideAnS [48]
3 years ago
11

Evauate 15 divide by r minus 1 when r = 5

Mathematics
2 answers:
kiruha [24]3 years ago
8 0
The Answer is 2 because 15 divided by r (5) is 3 and 3 minus 1 is 2
Alik [6]3 years ago
4 0
15 divided by 5 equals 3

3 minus 1 equals 2

so your answer would be 2 :)
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A cone has a base area of 8 cm^2 and a height of 3.8 cm. What is the volume of the cone?
Nitella [24]
The answer is:  30.4 cm³ .
________________________________________________________

The volume = Base Area * height = (8 cm²) * (3.8 cm) = 30.4 cm³ .
________________________________________________________



3 0
3 years ago
What is the measure of DE?<br><br><br> 16<br><br><br> 12<br><br><br> 20<br><br><br> 10
AnnyKZ [126]
 set up a ratio to find the length:

15/12 = DE/16

cross multiply the 15 & 16:
15 * 16 = 240

divide that by 12 to get DE

240 / 12 = 20

DE = 20
8 0
3 years ago
Need help please!!!!!
Yanka [14]

Answer:

Side 1 = 8, side 2=6, side 3=3 1/3 or 10/3

Step-by-step explanation:

We can set up a proportion comparing the sides of the original triangle to the new triangle.

The original triangle has sides 12, 9, and 5. The new triangle has sides 8, e, and f (use whatever letters you like, it doesn't matter, but for me, e is the side with the middle length and f is the side with the shortest length.

We can write 3 ratios, with the length of the new triangle over the length of the old triangle.

8/12  e/9  f/5

To figure out e and f, put each ratio equal to 8/12.

<u>8  </u> =  <u>e</u>  Then multiply both sides of the equation by 9 and get <u>72 </u> = e, 6=e.

12     9                                                                                              12

<u>8  </u> =  <u>f </u> Then multiply both sides of the equation by 9 and get <u>40 </u> = f, <u>10</u>=f.

12     5                                                                                              12          3

10/3 can be rewritten as 3 1/3.

6 0
2 years ago
What percent of 20 is 6
Luba_88 [7]

Answer:  30 percent of 20 is 6.

_______________________________________________

Step-by-step explanation:

_______________________________________________

(n/100)  * 20 = 6  ?  

Solve for "n"  .

_______________________________________________

Divide each side of the equation by "20" :

{ (n/100) * 20 }  / 20  = 6 / 20 ;

to get:

n/100  = 6/20 ;  

↔ 6/20 = n/100 ; solve for "n" ;

Look at the denominators:


20 * ? = 100 ?

  100/ 20 = ?  ;

  100/20 = 5 ;


So, 20 *  " 5" = 100 ;

Then 6* 5 = "n"  (for the numerator, "n";  in  :   "n /100" ) ;

                  →  6 * 5 = 30 ;

                  →  n = 30 .

_______________________________________________

 Answer:  30 percent of 20 is 6.

_______________________________________________

6 0
3 years ago
When adding decimals with same signs
Hitman42 [59]

Answer:

I’m pretty sure its a

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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