Answer:
21,637
Step-by-step explanation:
You can just use a caculator- Or simple multiplication by putting it on top of eachother.
You can do this many ways,just multiply with pen and paper,put 250 on top,and 85 on bottom which is 21,250,the add from there!
Hope I helped!!
Answer:
and 
Step-by-step explanation:
This is a quadratic equation, so we start by rearranging its terms so we can apply the quadratic formula:
has two possible solutions given by:
So we rearrange the terms in the given quadratic equation bringing all terms to the left hhand side of the equal sign:
The solutions will then be:
Therefore the two possible answer are: and
Step-by-step explanation:
it is a rectangle (usually).
so,
2×length + 2×width = 80
therefore, length + width = 40
length×width = 384
length = 384/width
384/width + width = 40
384 + width² = 40×width
width² - 40×width + 384 = 0
the general solution for such a square equation is
x = (-b ± sqrt(b² - 4ac))/(2a)
in our case
x = width
a = 1
b = -40
c = 384
width = (40 ± sqrt((-40)² - 4×1×384))/(2×1) =
= (40 ± sqrt(1600 - 1536))/2 =
= (40 ± sqrt(64))/2 = (40 ± 8)/2 =
= 20 ± 4
width1 = 20 + 4 = 24 cm
length1 = 40 - 24 = 16 cm
width2 = 20 - 4 = 16 cm
length2 = 40 - 16 = 24 cm
so, both solutions are the same.
the greeting card is 24×16 cm. or 16×24, depending on how you are holding it.
