A = l x w
so you know that the length is 3m longer than the width, so you could use a formula to represent that
w = l + 3
you then substitute the second equation into the first to solve for l
70 = l x (l +3)
70 = l^2 + 3l
you could then rearrange the formula and solve for l using the quadratic formula
0 = l^2 + 3l - 70
l = -3 +- (square root (3)^2 - 4(1)(70)) / 2(1)
l = -3 +- (square root 9 + 280) / 2
l = -3 +- (square root 289) / 2
l = -3 +- 17 / 2
then you solve for the two seperate roots
l = -3 + 17 /2
l = 14 / 2
l = 7
or
l = -3 - 17 / 2
l = -20 / 2
l = -10
since a length cannot be negative, this root is not viable. therefore l = 7
to solve for w you would use
w = l + 3
w = 7 + 3
w = 10
hope this helps! if you did not understand a step or concept please let me know!
Answer:
(5)
Step-by-step explanation:
The given two points are:
A(3,k) and B(h,4)
Now, using the distance formula that is=
.
In the given points, 
,
,
and 
, thus,
=
which is the required equation, hence option 5 is correct.
Answer:
t° = 11° s°= 71°
Step-by-step explanation:
79° + t° =90° (Given)
t°= 90° - 79°
t°= 11°
s°+79°+11°+19° =180° (angles on an str line)
s° = 180° - 109°
s° = 71°
answer: c. -3/8
Explanation: do it step by step so opposite of -3/8 is 3/8 the opposite of 3 /8 is -3/8
it sounds complicated but it is actually easy
Answer:
e we'll
Step-by-step explanation:
second equation
to –8x – 2y =-2. What property justifies this manipulation?
8x + 3y = 7
4x + y =1
