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.
Answer: 1- subtract 25 from 62, that’s your x
2- add 19 to 46, that’s your y
3- subtract 56 from 74, that’s your b
Step-by-step explanation:
Answer:
m^2+7m=0
Step-by-step explanation:
m(m+7)=0
m^2+7m=0
9514 1404 393
Answer:
9(2 +4x) = 18 + 36x
Step-by-step explanation:
There are 10 available digits, but only 7 available blanks. There will be many solutions. A couple of them are ...
9(2 +4x) = 18 +36x
6(9 +3x) = 54 +18x
Answer:
X= 232÷ 2-40
Step-by-step explanation:
so first you minus the 40 giving you 192. The you do 192 ÷ 2 giving you 96$. So Trey had 96$ saved before mowing lawns.
