Safa287 Safa287
  • 01-07-2021
  • Mathematics
contestada

the area of the rectangle is 48cm^2
show that x satisfies the equation x^2 + 7x -78 = 0

the area of the rectangle is 48cm2 show that x satisfies the equation x2 7x 78 0 class=

Respuesta :

Аноним Аноним
  • 01-07-2021

Answer:

No its doesn't satisfy the equation.

[tex]{ \bf{area = 2(l + w)}} \\ { \tt{48 = 2((x + 10) + (x - 3))}} \\ { \tt{24 = 2x + 7}} \\ 2x = 17 \\ x = 8.5 \\ \\ { \bf{in : \: {x}^{2} + 7x - 78 = 0 }} \\ x = 6 \: \: and \: \: - 13[/tex]

Answer Link

Otras preguntas

name a metal that doesn't conduct electricity
What's the word for to talk on and on pointlessly, without clear direction
How would you call in other words to scold or punish severely
How did Niccolo Machiavelli’s book The Prince set him apart from other writers of the Renaissance?
Heat is released when H2 gas and O2 gas react to form H2O. Why? A. Breaking the H–H bond in H2 gas releases heat. B. Breaking the O–O bond in O2 gas releases he
If X is the set of negative numbers and Y is the set of positive numbers, then the union of X and Y and 0 is the set of (A) all real numbers (B) all integers (C
write in decimal form fourteen and eighty-Four hundredths
What is the highest mountain on each continent?
What's the other word a weak or lifeless feeling
Which chemical equation best describes the reaction of potassium metal with fluorine gas to form solid potassium fluoride? A. K(s) + F2(g) → KF2(s) B. K(s) + F(