If you use the property of substitution, you can get (-2, 6.5) as your answer. Substitute the value of X (-2) in the initial equation and solve for Y.
Y= -3/4 (-2) +5 ( I am sure you inadvertently put the Y here also)
Y= 6/4 + 5
Y = 6.5
First of all, your second term is already wrong. When you divided 8x² by 4 ,
you should have written 2x² , not 4x² .
Make that correction, and then divide the whole thing by 'x'.
Then you'll have x² - 2x + 1 = 0 .
You should have no trouble solving that one,
(especially since it's a perfect square)
That gives you two (equal) solutions. But you should also ask yourself:
"Self ! Where is the third solution ? A cubic equation like the original
one needs three solutions."
I'll give you that one:
Look over the original equation, and look at what happens to it when x = 0 .
Then the left side becomes zero, and the equation is 0 = 0 . Since that's a
true statement, " x = 0 " is another solution of the cubic equation, and now
you have all three of them.
Answer:
no she will not
Step-by-step explanation:
145*11 < 1900
Answer:
Bananas = $3.6/ kg
Oranges = $3.1/ kg
Step-by-step explanation:
Let represent Bananas by B and Oranges by O:
According to given conditions:
2B + 3O = $16.50 .........eq1
O + 0.50 = B ................. eq2
By taking eq2:
O = B - 0.50............. eq3
Now putting value of O in eq1 we get:
2B + 3(B - 0.50) = $16.50
By simplifying we get:
2B + 3B - 1.5 = $16.50
5B = $(16.50 + 1.5)
5B = $18
B = $3.6
Putting value of B in eq3
O = $3.6 -0.50
O = $3.1
So the cost for Bananas And Oranges per kilogram are:
Bananas = B = $3.6
Oranges = O = $3.1
I hope it will help you!