Fill in the blanks :-
26. The sum of two monomials is always a ________.
27. The sum of x − y ,3 x² − 4y and 3x − y + 6 is __________.
28. Subtracting – x²+ 10x − 5 from 6x − 15 , we get ______________.
29. When two expressions are added ,we add their like ___________ terms and leave the _________ terms as they are.
30. The value of y²-5 for y= -5 is ___________.
31. x² −(- x)²is equal to _________.
32. The value of [x+y/6] at x=5 and y=7 is __________.
33. In the algebraic expression (4a=5b-c-5a+6ab),the like terms are 4a and _____________.
34. When -2/3 x²is subtracted from 0 ,we get ___________.
35. In ∆ PQR, the included angle between QR and RP is ______________.
36. If in an isosceles triangle, each of the base angles is 40°,then the triangle is ___________.
37. If one angle of a triangle is equal to the sum of other two, then the measure of that angle is __________.
38. State the Pythagoras property.
39. Which conditions are necessary to be satisfied by a pair of angles for them to be adjacent ?
40.The angles are equal and complement of each other,Each angle measures ______________.
Answers
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40. 180
Step-by-step explanation:
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Step-by-step explanation:
26) a monomial
27)x-y+3x²-4y+3x-y+6=3x²+4x-6y+6
28)6x-16-(-x²-10x+5)=x²+16x-5
29) coefficient terms ,unlike terms
30)(-5)²-5=25-5=20
31)x²-(-x²)=x²+x²=2x²
32)5+7/6=(30+7)/6=37/6
33)-5a
34)0-(-2/3x²)==2/3x²
35)angle QRP or angle PRQ or angle R
36)the third angle is 100° It is an obtuse Isosceles triangle.
37)90°
38) In a right angled triangle , The square of the hypotenuse is equal to the sum of the squares of the other two sides.
39)if two angles are having same common vertex on the same line
40)45°
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