Answer:
There are a lote of examples for a real world problem that could be solve with the equation, you need that the x in both sides represents the same thing.
This is what i came up with:
Sam bought 7.5 kilos of oranges, which cost the same as buying 5.5 kilos of oranges plus $ 25
The equation that describes the above is
where x is kilograms of orange.
Solving for x you will find the cost of 1 kilogram:
-2x(x-3) = -11
-2x(x) -2x(-3) = -11
-2x² + 6x = - 11
-2x² + 6x + 11 = 0
Let us use the quadratic formula in solving for the value of x.
-2x² + 6x + 11 = 0
a = -2 ; b = 6 ; c = 11
x = (-b <u>+</u> √b² -4ac) ÷ 2a
x = (-6 + √6² - 4(-2)(11)) ÷ 2(-2)
x = (-6 + √36 + 88) ÷ -4
x = (-6 + √124) ÷ -4
x = (-6 + 11.14) ÷ -4
x = 5.14 ÷ -4
x = -1.285 or -1.29
x = (-6 - 11.14) ÷ -4
x = -17.14 ÷ -4
x = 4.285 or 4.29
Answer:
yes
Step-by-step explanation:
175 + 263 = 438
to get 40% do 40/100=0.4
so 438 x 0.4 = 175.2
175 is about 40% of 438
A because if you reflected this across the answer would be 4,6
Answer:
0.40 + 0.02
Step-by-step explanation:
4 tenths plus 2 hundredths