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kap26 [50]
3 years ago
11

Physical and chemical changes

Mathematics
2 answers:
OlgaM077 [116]3 years ago
5 0
Physical changes the appearance of matter. Chemical change is when two substances combine to form a new one
SCORPION-xisa [38]3 years ago
3 0

Answer:

Physical and chemical changes can occur in matter. The look of material changes as a result of a physical change. Physical changes are sometimes known as phase changes. When materials change phase, they transition from solid to liquid, liquid to gas, or some other combination. If you mix materials together and see fire, bubbles, or a change in color, you might be able to see a chemical shift.

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Rectangle is 5 feet wide and 11 feet long. What is the perimeter
Ahat [919]

Answer:

Just add all side

5+11+5+11=32 feet

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The table below shows the linear relationship between the number of people at a picnic and the total cost of the picnic.
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12. (r - 5)3 + r2 ifr= -3 and s= -4
Natasha2012 [34]

Answer:

-503

Step-by-step explanation:

the statement tell us:

(r - 5)^3 + r^2

r= -3

so we have:

(-3 - 5)^3 + (-3)^2

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6 0
3 years ago
54 sq. Ft. Rectangle 9 ft. Lenght what is width
densk [106]
6 because 54 divided by 9 is 6
7 0
3 years ago
The length of a string is L inches. Samantha cuts it into two unequal pieces such that the length of the small piece is 35% of L
skelet666 [1.2K]

Answer:

The shorter piece   x  =  8.4 in

The longer one    y  =  15.6 in

Step-by-step explanation:

If we cut  a string length  L  in to unequal  pieces we get two pieces

first one with length  x  and the other one with length  y

Let call  x  the smaller piece,  then   y = L  -  x will be the longer one

If   x  =  35 %    then

x  =  0,35* L     and

y = L -  x  =  L - 0,35*L      ⇒  y  =  0,65 L     ⇒ y  =  0.65*24

Now if L  =  24  in

x  =  0,35*24          ⇒               x = 8.4 in

and

L  -  x  =  0.65*L      ⇒       L - x  =  0.65*24     y  =  L  -  x  =  15.6 in

as way of verification you can add the length of the two pieces and find:

8.4  +  15.6  = 24 in

4 0
3 years ago
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