Explanation

 If both the like terms are either positive or negative, then the resultant term will always be positive.

Explanation

Area= a+b/2* h

putting the values

Area= 54+45/2* 36

=99/2*36

=49.6*36

Area= 1782

Rate=2.5

1782*2.5=4455

Total expenditure=4455

Explanation

A vertebrate is an animal with a spinal cord surrounded by cartilage or bone.

  Vertebrates include birds, fish, amphibians, reptiles, and mammals.

Explanation

Vertebrate is an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.

Explanation

Sodium Bicarbonate is the monosodium salt of carbonic acid with alkalinizing and electrolyte replacement properties

Explanation

6444325689 - 8344000351=1899674662

Explanation

99-10=89

Explanation

 Sound energy is a form of energy that can be heard by living beings.

Only those waves that have a frequency of 16 Hz to 20 kHz are audible to humans.

Explanation

Let the age of D= x

Mother =2x

After 2 years = x+2

Mother = 2x+2

X+2 +2x+2=49

3x+4=49

3x=49_4

3x=45

x=15

Current age of daughter =15

After two years= 15+2=17

Explanation

halt رک

 The word halt means stop