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# What percent of php 850 is php 1000​

• Réponse publiée par: alexespinosa

possible answers: -6, 6, using reverse operation method

(opposite of subtraction, use addition)

18 + 30 = 48

(opposite of division, use multiplication

48 x 3 = 144

(opposite of square, use square root and can be splitted into 2 operations)

√144

=-12 or 12

(opposite of multiplication, use division)

= -12 / 2 or 12/2

= -6 or 6

• Réponse publiée par: enrica11

vertex angle is 66°

step-by-step explanation:

in an isosceles triangle the two base angles are congruent. the third angle is the vertex angle. in any triangle the sum of the three angles will be 180°.

let v = the vertex angle

let b = each of the base angles

v + b + b = 180°

v = b + 9 (the vertex angle of an isosceles triangle is 9 degrees more than a base angle)

substitute b + 9 for v, in the equation v + b + b = 180°

(b + 9) + b + b = 180° combine like terms to simplify

3b + 9 = 180° subtract 9 from both sides

3b = 171° divide both sides by 3

b = 57°

v = b + 9° => v = 57° + 9° = 66°

check: 57° + 57° + 66° = 180°

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What percent of php 850 is php 1000​...