When a line is given in the form
The slope of the line is m. So, in this case, the slope of 
is -1.
Given a slope 
, you find the slope of a perpendicular line 
by imposing
So, if the given line has slope -1, a perpendicular line has slope given by
and thus 
So, we want a line with slope 1 and passing through (9,2). Using the fomula
we get
Answer:
Option B. 4
Step-by-step explanation:
The given expression is x² + 4x + -----
We have to find a number which can be added in the expression to make it a perfect square trinomial.
x² + 2(2x) + 2²
= (x + 2)²
Therefore, if we add 4 in the given expression it becomes a perfect trinomial.
Option B is the correct option.
Let the number be n.
Then 2(7-n) = 4n, or 14 - 2n = 4n, or 14 = 6n. Then n = 7/3 (answer)
4m + 7a = 14.89
8m + 3a = 18.89
Multiply the first equation by 3 and the second equation by 7
12m + 21a = 44.67
56m + 21a = 132.23
Then subtract the equations and get:
44m=87.56
m=1.99
mangoes cost = $1.99<em>
</em>To find the price of apples, substitute with the mangoes on one equation
4(1.99) + 7a = 14.89
7.96 +7a = 14.89
7a = 6.93
a = 0.99
apples cost = $0.99
.....hope this helps///:)::))):))
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