A group of preschoolers has 8boys and 24 girls. What is the ratio of girls to all children
2 answers:
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Answer :
(1)
Use FOIL method to mulitply (3x – 5)(3x – 5)
(2)
Use FOIL method to mulitply (3x - 5)(3x + 5)
(3)
Use FOIL method to mulitply -(3x + 5)(3x + 5)
(4)
Use FOIL method to mulitply -(3x + 5)(3x - 5)
So equation 2 is true
Answer:
(8,-1)
Step-by-step explanation:
Given :
To Find: solution of given system of equations.
Solution:
Equation a :
Equation b :
Substitute the value of y from equation b in equation a
y from equation b : y = 7-x
Now substitute value of y in equation a
Thus equation a becomes:
⇒ x= -1 and x = 8
Now substitute values of x in equation b to obtains values of y
⇒
for x = -1
⇒
⇒
⇒
Thus (x,y)=(-1,8)
For x =8
⇒
⇒
⇒
Thus (x,y)=(8,-1)
Hence Option A is the correct solution .