All categories

3 years ago

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

Mathematics

1 answer:

FrozenT [24]3 years ago

8 0

Answer:

No its doesn't satisfy the equation.

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

You might be interested in

2 equivalent forms of 0.7875

nadezda [96]

Idk what that answer is soooo

4 0

4 years ago

Fifteen members of the math club each wore a t shirt with a number printed on the front the students names and numbers are liste

a_sh-v [17]

Double how you wrote I don’t make sense

4 0

3 years ago

The population of bloomington is 2.4times 10^6 while the population of Smallville Is 12,000. How many times greater is the popul

dem82 [27]

Answer:

2 * 10^2 times

Step-by-step explanation:

Given:

Population of Bloomington = 2.4 * 10^6

Population of Smallville = 12000

How many times greater is the population of Bloomington than Smallville ;

Population of Bloomington / Population of Smallville

2.4 * 10^6 / 12000

2.4 * 10^6 / 1.2 * 10^4

= 2 * 10^(6 - 4)

= 2 * 10^2

= 2 * 10^2 times

4 0

3 years ago

helpp on 3 and 4 you have to divide on the 3 one and it will give you a whole number. (will mark brainiest)

miss Akunina [59]

Answer:

3 - 7

4 - 8

Step-by-step explanation:

The answer to 3 is 7 since 8.75 / 1.25 = 7

The answer to 4 is 8 since 18 / 2.25 = 8

Hope I helped you and have a great day!

Please mark me as brainliest and mark me 5.0 with a thank you!

7 0

3 years ago

?????????????? ?????

Nonamiya [84]

Answer:

A. x² - x

General Formulas and Concepts:

Pre-Algebra

Distributive Property

Algebra I

Terms/Coefficients/Degrees
Expand by FOIL (First Outside Inside Last)

Geometry

Area of a Rectangle: A = lw

Step-by-step explanation:

Step 1: Define

l = x

w = x - 1

Step 2: Find A

Substitute [AR]: A = x(x - 1)
Distribute x: A = x² - x

8 0

3 years ago