Answer both correctly and I’ll give golden brain c:

1.a=5,b=-2

Step-by-step explanation:

2x+a=5-bx

divide by 2

or

equate the coefficients of like terms

-b=2

b=-2 (coefficient of x)

a=5 (constant terms)

2.

72°

external angle= sum of two opposite internal angles.

∠2=42+30=72°

2 Answers:

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Explanation:

The left and right walls are mirror copies of one another, and they are also copies of the cross section as well. Think of a subdivision to divide one room into two smaller ones. That middle wall is the same as the left and right walls of the original larger room. Effectively, those two smaller rooms are blocks of their own we can pull apart or cut.