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NemiM [27]
2 years ago
12

Help help help math math

Mathematics
1 answer:
Arada [10]2 years ago
6 0

Answer:

x  >  - 14

Step-by-step explanation:

Since the dot in the illustration isn't filled in, that means that x can not be a part of -14, which means it is greater than 14

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A plot of land doubles in size by adding x meters to the length and x meters to the width of the land. If the original plot had
Yuri [45]
Given:
plot of land doubles in size.
original plot area 200 by 300 meters

Area = 200m * 300m
A = 60,000 m²  original plot area

60,000m
² x 2 = 120,000 m²

(200m + x)(300m + x) = 120,000 m²

60,000m² + 200m*x + 300m * x + x² = 120,000 m²

x² + 500x + 60,000 = 120,000
x² + 500x + 60,000 - 120,000 = 0
x² + 500x - 60,000 = 0

x = -b <u>+</u> (√b² - 4ac)/2a 

a = 1 ; b = 500 ; c = -60,000

x = -500 + (√500² - 4(1)(-60,000)) / 2(1)
x = (-500 + (√250,000 + 240,000)) / 2 
x = (-500 + 700)/ 2
x = 200 / 2
x = 100 meters

(200 + x)(300 + x) = 120,000
(200 + 100)(300 + 100) = 120,000
300 * 400 = 120,000
120,000 = 120,000

8 0
3 years ago
I need help with these questions
maks197457 [2]
I think the answer would be 2 because if you divide 4 into 2 it equals 2
5 0
3 years ago
Can i get some help please
Brilliant_brown [7]

Answer:

60

Step-by-step explanation:

We can use the pythagorean theorem to find the leg.

10^2+x=13^2

x=12

We now find the area given the height of the triangle.

10 X 12=120

120/2=60

3 0
2 years ago
Read 2 more answers
At what point does the curve have maximum curvature? y = 9 ln(x) (x, y) =
Andrews [41]

y = 9ln(x) 
<span>y' = 9x^-1 =9/x</span>
y'' = -9x^-2 =-9/x^2

curvature k = |y''| / (1 + (y')^2)^(3/2) 

<span>= |-9/x^2| / (1 + (9/x)^2)^(3/2) 
= (9/x^2) / (1 + 81/x^2)^(3/2) 
= (9/x^2) / [(1/x^3) (x^2 + 81)^(3/2)] 
= 9x(x^2 + 81)^(-3/2). 

To maximize the curvature, </span>

we find where k' = 0. <span>
k' = 9 * (x^2 + 81)^(-3/2) + 9x * -3x(x^2 + 81)^(-5/2) 
...= 9(x^2 + 81)^(-5/2) [(x^2 + 81) - 3x^2] 
...= 9(81 - 2x^2)/(x^2 + 81)^(5/2) 

Setting k' = 0 yields x = ±9/√2. 

Since k' < 0 for x < -9/√2 and k' > 0 for x > -9/√2 (and less than 9/√2), 
we have a minimum at x = -9/√2. 

Since k' > 0 for x < 9/√2 (and greater than 9/√2) and k' < 0 for x > 9/√2, 
we have a maximum at x = 9/√2. </span>

x=9/√2=6.36

<span>y=9 ln(x)=9ln(6.36)=16.66</span>  

the answer is
(x,y)=(6.36,16.66)
7 0
3 years ago
The two functions below are used to represent the height of a rocket above the ground after it is launched. which rocket reaches
Bess [88]
<span>The rocket that will reach a greater distance above the ground at its maximum height is y = -4x</span>² + 80x. The answer is letter B. This is because of the coefficient presented in the x² term. The number -4 is much greater than -6. Graphing these equations into a graphing paper or excel, you would get a parabola. 
7 0
3 years ago
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