For this case we must propose an algebraic expression associated with:
"four times a difference of a number and seven is 12"
So we have to:
Four times a difference of a number and seven is represented as:
So we have the expression is:
We apply distributive property to the terms within parentheses:
We add 28 to both sides:
We divide between 4 on both sides:
Answer:
18-2x-14=8x-20-1
4-2x=8x-21
4+21=8x+2x
25=10x
25/10=x
5/2=x
Answer:
51
Step-by-step explanation:
Answer: 9
Step-by-step explanation: sorry I don’t know
Answer: Using Pythagoras Rule the ladder touches 13.75ft ~ 14ft up the wall.
Step-by-step explanation: Using the Pythagoras Rule the Hypothenus is the leaning hieght of the ladder 15ft
And the base is 6ft. Now let's find the height of the wall h¹
h¹ = √{15² - 6²}
h¹ =√{225 - 36}
h¹ = √189
= 13.74ft