Hello :
<span>an equation is : y=ax+b a is a slope</span>
The measure of the angle R is 
Explanation:
It is given that the lengths of the triangle are PQ = 8 and QR = 3
To find the angle of R using the opposite and adjacent side, we shall use the tangent formula.

where opp = 8 and adj = 3
Thus, substituting these values in the formula, we get,

Multiplying both sides by
, we get,

Dividing, we get,

Rounding off to the nearest tenth, we have,

Thus, the measure of the angle R is 
a- 2/10 divide the fraction by 6
b-2/17 divide the fraction by 3
The answer to this follow question is -70x - 100
here is the extra work
calculate the product to get your answer
let length = x
width is 7 feet less than length
width = x-7
area = length *width
area = x(x-7)
170=x²-7x
x²-7x-170=0
x²-17x+10x-170=0
x(x-17)+10(x-17)=0
(x-17)(x+10)=0
x=17 or x=-10
since length cannot be negative so x=17
and width =x-7 =17-7=10
length =17 feet and width =10 feet