Answer:
Q1. 20x = 200. The value of x is 10
Q2. 7 - 3x = 1. The value of x is 2.
Step-by-step explanation:
In order to find an equation, you have to let the number be any variable, such as m or n or z. So I will let the number be <em>x variable</em>. Then the question says a number is multiplied by 20 is equals to 200 :
Let number = x,
Same for the next question. Given that a number multiplied by 3 :
Let number = x,
Then subtracted by 7 equals to 1 :
Answer:
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Answer:
Step-by-step explanation:
Area of plane figures
Being r the radius of a circle, the area of a sector defined by an angle is
If a is the repeated side of an isosceles triangle and is the angle they define, then the area of the triangle is
The figure shows a circle with radius of r=7 cm. The white area is equal to the area of the circle minus the blue area
The area of the circle is
The blue area is the sum of the sector defined by the angle (360-150)= and the triangle. An angle of is equivalent to
The area of the sector is
The area of the triangle with center angle 150^o is
The blue area is
Finally, the white area is