Start with
Add 2 to both sides:
Divide both sides by 7:
Which is true if
If we choose the positive alternative, we have
Otherwise, we have
The depth of a lake is most likely to be measured in
2 answers:
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Answer:
13
Step-by-step explanation:
The distance that has from
is:
So let's just apply the formula there:
Correct option is C)
On putting x=2y+5 in second equation, we get
y=(4y+7)(2y+14)
⇒8y 2 +70y+98=y
⇒8y 2+69y+98=0
Discriminant D=69 2−4(8)(98)=1625>0
Hence, the equation has 2 real roots.
Therefore, there are 2 ordered pair.
Option C is correct.
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