(4.5y +9)-(6.2-3.1y)= 7.2y+2.8

0

Step-by-step explanation:

(4.5y+9)-(6.2-3.1y)=7.2y+2.8

4.5y+9-6.2+3.1y=7.2y+2.8

4.5y+3.1y+9-6.2=7.2y+2.8

7.6y+2.8=7.2y+2.8

7.6y-7.2y=2.8-2.8

0.4y/0.4=0/0.4

y=0

I hope this helps

y=0

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable

1. Open the brackets

problem: 4.5y + 9 - 6.2 + 3.1y= 7.2y + 2.8

2. Combine like terms/solve for y

problem: 7.2y-4.5y-3.1y=-0.4y

-0.4y=9- 6.2 - 2.8=0

3. Solve/algebra

-0.4y=0

*-0.4 divided by zero is 0, (anything divided by 0 is 0!)

y=0

Cheers! Hope you understand this.

true

step-by-step explanation:

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.