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

What is a list of countries without volcanoes?
Translucent definition: __________ is allowed to pass through translucent objects.
how do I solve 9 1/9 - 5/6
You begin solving the equation 4 – 5x = 59 by subtracting 4 from both sides. Which is the best choice for Step 2?
what does diametor mean?
I would like to know if 1 km is greater or less then 999 m
Can someone help me please!!!!!1.Grace and Allie are going to meet at the fountain near their houses.They both leave their houses at the same time. Allie passes
Aqueous solutions of this ion give a reddish precipitate when excess hydroxide ion is added. (A) Cu^{2+} (B) CO₃^{2−} (C) Fe^{3+} (D) Al^{3+} (E) Pb^{2+}
A man exchanged a dollar bill for change and received 7 coins, none of which were half dollars. How many of these coins were dimes?
A man exchanged a dollar bill for change and received 7 coins, none of which were half dollars. How many of these coins were dimes?