Help me with my math homework please?

Question

Here the problem:

An elephant, a hippo, and a rhino weigh 4500 pounds. If the elephant weighs 3 times as much as the hippo, and the rhino is half the size of the hippo, how much does each weigh?

And can you explain to me how to do it?

Answer 1

e be elephent

r be rhino

h is hippo

e=3h

e +r+h=4500

2r=h

e=6r

      subst

argh

im rusty from summer

Answer 2

elephant weighs 3,000 pounds

hippo weighs 1,000 pounds

rhino weighs 500 pounds

hippo=1000  

elephant is 3 times the hippo, which is 1000 times 3 = 3000

rhino is half the hippo half of 1000 is 500

elephant =3000 + hippo=1000 + rhino=500 equaling 4500 pounds

Answer 3

hi

i think its like that if the elephant was 3 times the hippo that means they r 3 and 1 and as long the rhino is half that equals 0.5 so in that case the elephant weighs 3000 the hippo 1000 and of course the rhino is 500 .

this is what i think they weigh good luck

Answer 4

Since the weights of the elephant and rhino are compared to the hippo, let's call the hippo's weight "x".  

The elephant weighs 3 times as much as the hippo. We'll call the elephant's weight "3x".

Finally, the rhino weighs half as much as the hippo, so we'll call the rhino's weight "1/2 x" or better yet "0.5x".

Here's what we have to work with:

x = hippo.

3x = elephant

0.5x = rhino

We also know from the problem that the combined weight of the 3 animals is 4500 pounds, so...

x + 3x + 0.5x = 4500

Combine the like terms, and you get...

4.5x = 4500

Divide both sides by 4.5, and you get...

x = 1000 = hippo's weight

To get the other two weights, use 1000 as x:

3x = (3 * 1000) = 3000 = elephant

0.5x = (0.5 * 1000) = 500 = rhino

Check your answers by adding the three weights:

1000 + 3000 + 500 = 4500

Answer 5

500 + 1000 + 3000 = 4500

since the rhino is half the size of the hippo, the hippo is half he size of the rhino.

So let X = the size of the hippo

let 2X = the size of the rhino

Since the Elephant is 3 times the size of the rhino, multiply 2X by 3 which makes it 6X

6+2+1 = 9

4500 ÷ 9 = 500 which is X

2X = 1000

3 X 1000 = 3000

Answer 6

The Elephant weighs 3,000 pounds

The Hippo weighs 1,000 pounds

The Rhino weighs 500 pounds

You divide 4500 by 3 and double it to get 3000, which is the weight of the Elephant. If you divide 3000 by 3, you get 1000, the weight of the Hippo. Divide that by 2 and you get 500, the weight of the Rhino. 3000+1000+500= 4500.

Answer 7

Start with the lowest common denominator for this one. The LCD is the smallest critter, the rhino. The hippo is 2x. The elephant, at three times the weight of the hippo, is 3(2x), or 6x. Follow? Now how many total x's we got? It's 1st grade addition: 1x+2x+6x=9x And the total weight is 4500 pounds, so 6x=4500. Since you need the3 value of x, isolate it on one side of the equation by dividing both sides by 9. And there you have it: x=500 pounds. Thus the rhino weighs 500, the hippo 1000, and the elephant 3000 pounds. This feat of magical mathematics was brought to you courtesy of an English major, no less, who cautions you to remember how to do this sort of thing to calculate the best price at the supermarket.

A calculator is of no use unless you ask it the right questions, dudes and dudettes.

Answer 8

let E = elephant, H= hippo, R = rhino

4500 = H + 3H + 1/2

4500 = 4H + 1/2    

9000= 4H      because u multiply 4500 by 2/1 or just 2, which is the reciprocal of 1/2

H = 2250

Hippo = 2250

Elephant = 3*2250 = 6750

Rhino = half of 2250 which= 1125