How to do this algebra problem -7(7×-3)=126

x = -2.14

Explanations:

How to do -7 (7x - 3) = 126

1. Use distribution property

-7(7x) - 7(-3) = 126

-7 times 7x = -49x

-7 times -3 = 21  (Negative times Negative sign = positive sign)

-49x + 21 = 126

2. Combine the like terms

21 and 126 are like terms

-49 = 126 - 21 ( When negative sign or positive sign crosses an equal sign, the negative sign changes to positive and positive changes to negative)

-49x = 105

3. Divide

Divide via by -49

-49x/-49 = 105/-49

x = -2.14

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice