2 years ago

What is the positive solution for the equation: x2−8x=9

Mathematics

2 answers:

krek1111 [17]2 years ago

8 0

Answer:

3.33..

Step-by-step explanation:

x2-8x=9

x-6x=9

-5x=9

x=-5/9

(-5/9)(2)-8(-5/9)=3.33.. (3 and 1/3)

Oxana [17]2 years ago

7 0

Answer:

x = 9

Step-by-step explanation:

x² - 8x = 9

x² - 8x - 9 = 0

(x - 9)×(x + 1) = 0

x = 9 or x = -1

Positive solution : x = 9

You might be interested in

Three houses are mapped on a coordinate grid. Joshs house is located on red street at (-5,-4). Sarah’s House is located on green

vlada-n [284]

Answer: 90

Step-by-step explanation:

5 0

3 years ago

Terrance runs 5 miles each week. His brother runs 5/6 the distance Terrance runs in one week. How far does Terrance’s brother ru

Firlakuza [10]

5\6 × 7 equals C 5 1\6 miles

6 0

3 years ago

3/4m^2-1 -5/2m+1 what is the answer and the solution

Ratling [72]

Solve Using the Quadratic Formula (m+ 4)(4m-2)=5(m+3)-10 ..... Use the quadratic formula to find the solutions.

5 0

3 years ago

In ΔCDE, \overline{CE}

abruzzese [7]

Answer:

$m\angle CDE=14^o$

Step-by-step explanation:

we know that

An exterior angle of a triangle is equal to the sum of the opposite interior angles.

see the attached figure to better understand the problem

∠DEF=∠ECD+∠CDE

substitute the given values

$(4x+5)^o=(x+9)^o+(x+8)^o$

solve for x

Combine like terms

$(4x+5)^o=(2x+17)^o$

Group terms

$4x-2x=17-5$

$2x=12$

$x=6$

Find the measure of angle CDE

$m\angle CDE=(x+8)^o$

substitute the value of x

$m\angle CDE=(6+8)=14^o$

8 0

3 years ago

8 is the difference of d and 3.75

maria [59]

Answer:

11.75

Step-by-step explanation:

From the question above 8 is the difference of d and 3.75

We are required to find the value of d

d-3.75= 8

d= 8 + 3.75

d= 11.75

Hence the value of d is 11.75

7 0

2 years ago