9x mean 9 multipled with an unkown number and 9x is subtracted from another unknown number 'y' . you can substitute with any letters you want ,but you have to use two different letters.
∠SCD =150 and ∠BCD=174 (Given)
∠BCS + ∠SCD = ∠BCD (Segment Addition Postulate)
∠BCS + 150 = 174 (Substitution)
∠BCS = 24 (Subtraction Property of Equality)
Answer: 24
The roof is made up of two mirred right triangles which are congruent. We can find the width by finding the width of one of the triangles then doubling the answer to get the width of the entire roof.
We are given that the slope (rise over run) is 5/12 which means that for every 5 feet of height there is 12 feet of width. We can use this ratio to find the width of one triangle given the height of 8 by setting up the following proportion:
5/12 = 8/x
Solve for x by cross multiplying:
5x = (12)(8)
x = (12)(8)/5
x = 19.2 feet
Multiply by 2 to get the entire width:
(19.2)(2) = 38.4 feet
The answer is 38.4 feet
Answer: other than 7
Step-by-step explanation:
Given
Equation is 
For an equation to have no solution, the missing number can be any number other than 7
because if we put 7 then it justifies the equation i.e. 
while on the other hand for a number other than 7, it does not justify the equation.
