3 years ago

What is the speed of each

Mathematics

1 answer:

elena-s [515]3 years ago

7 0

the rates of change will be 210. if the change is after 8 hours than the rate of change will be 105

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Can y’all help me please

matrenka [14]

Answer:

w = 5

Step-by-step explanation:

The perimeter of a rectangle is given by

P = 2(l+w)

28 = 2(2w-1 + w)

Combine like terms

28 =2(3w-1)

Divide each side by 2

28/2 = 2/2(3w-1)

14 = 3w-1

Add 1 to each side

14+1 = 3w-1+1

15 = 3w

Divide each side by 3

15/3 =3w/3

5 =w

8 0

3 years ago

Water has a density of 1.00g/cm^3 per cubic centimeter. What is the mass of half a liter of water?

anygoal [31]

Answer:

The mass of half a liter of water is 500g, that is, 0.5kg.

Step-by-step explanation:

Density is mass divided by the volume, that is:

$d = \frac{m}{v}$

Here, we have to be careful. Since the density is in grams per cm³, m has to be in grams and v in cm³.

We have that:

$d = 1$

What is the mass of half a liter of water?

One liter is 1000 cm³.

So half a liter is 1000/2 = 500 cm³, which means that $v = 500$

Then

$d = \frac{m}{v}$

$1 = \frac{m}{500}$

$m = 500$

The mass of half a liter of water is 500g, that is, 0.5kg.

7 0

3 years ago

Jules has $1,200 and is saving $40 per week. Kelsey has $400 and is saving $50 a week. In how many weeks will Jules and Kelsey h

enyata [817]

80 weeks
1,200+40x=400+50x
800+40x=50x
800=10x
x=80

3 0

3 years ago

Find x and y. <br>x - y = 2 <br>3x - y = 12

omeli [17]

the answer is

X=5

y=3

hope you like it

8 0

1 year ago

どうすれば2個の卵を壊さずに最も少ない回数で落とすことができますか？

Vikentia [17]

Answer:

知りません

Step-by-step explanation:

6 0

3 years ago