2x-3y=13
x+2y=-4
First times the second problum by 2.
2x-3y=13
2(x+2y=-4)
Your new problum is
2x-3y=13
2x+4y=-8
Now subtract both problums
2x-3y=13
-2x+4y=-8
------------------
-7y=-21
Now divde the -7 on both sides.
-7y=-21
/7 /-7
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y=2
Now you want to substitute the y for the 2 in on of your problums.
x+2(2)=-4
Now mutiplie the 2 by the 2
x+4=-4
Now subtract the 4 on both sides to solve for x.
x+4=-4
-4 -4
--------------
x=-8
Answer:
d = 1.4 t + 30
Step-by-step explanation:
Head start means any advantage achieved or advantage gained in any race or competition.
In the context, the runner is gained a head start of 30 meter from the starting point.
It is also given that the speed with which the runner is running is 5.0 km per hour.
Therefore, the equation that gives the distance covered by the runner from his start line at any time in seconds is given by d = 1.4 t + 30.
The radical is 2√21.
<h3>What is radical?</h3>
The √ symbol that is used to denote square root or nth roots.
Given :
√84
= √2*2*21
=2√21
Hence, the radical is 2√21.
Learn more about radical here:
brainly.com/question/14923091
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