The length of a rectangle field is 20 less than its width. The area of the field is 12000 ft ^2. What is the width of the field?

1 answer:

3 0

L = w - 20

12000 = w × ( w - 20 )
12000 = w^2 - 20w
w^2 - 20w - 12000 = 0
( w - 10 ) ( w - 10 ) = 0

width = 10

i am a mathematics teacher. if anything to ask please pm me

You might be interested in

(1) What is the speed at which Mantas travels, if it has traveled for 120 kilometers: a) 4 h? b) 6 h? c) 180 min? d) 2.4 h? 2) W

storchak [24]

Answer:

120/t

Step-by-step explanation:

the formula for calculating speed is v=s/t where s is distance and t is for time.

since the Mantas travelled 120km in t times so

v=120/t.

7 0

3 years ago

(x - 1) (x – 12) = 0<br> What’s the value of X?

Over [174]

Answer:

either 1

or 12

(sorrryy if its not correct:( )

Step-by-step explanation:

7 0

3 years ago

Perform the requested operation or operations. f(x) = 7x + 6, g(x) = 4x2 find (f + g)(x).

Lina20 [59]

(f + g)(x) = 7x + 6 + 4x² = 4x² + 7x + 6

The notation given means to add the rules of f(x) and g(x), and since there are no like terms, your answer is 4x² + 7x + 6

5 0

3 years ago

If f(x)=x^2+3 and g(x)= -x-1 find the value of:

dedylja [7]

$f(x)=x^2+3 \\ g(x)= -x-1 \\ 1. (g+f)(2)=g(2)+f(2)=(-x-1)+ (x^{2} +3)= x^{2} -x+2= (2)^{2} -(2)+2=4 \\ 2. (f/g)(1)=\frac{f(1)}{g(1)}= \frac{x^2+3}{-x-1} = \frac{(1)^2+3}{-(1)-1} = \frac{4}{-2} =-2$
$3. (g-f)(6) =g(6)-f(6)=(-x-1)-( x^{2} +3)=- x^{2} -x-4 \\ =- (6)^{2} -(6)-4=-46$

4 0

3 years ago

Plz help me I’ll make brainliest

arlik [135]

Answer:

m=4 because 2 times 4 is 8 and n= 8 because 2 times 8 is 16

Step-by-step explanation:

6 0

4 years ago

Read 2 more answers