1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
krok68 [10]
3 years ago
5

A square has a side that is (x-3) units long. If the area of the square is 126.5625 sq units, what is the value of x?

Mathematics
1 answer:
Kitty [74]3 years ago
4 0

Answer:

14.25 units

Step-by-step explanation:

Area of a square= l*b= (x-3)(x-3)=x^{2}-3x-3x+9=x^{2}-6x+9

x^{2}-6x+9=126.5625

x^{2}-6x-117.5625

Solving the equation using quadratic equation then as attached

x=14.25 units

To prove

x-3=14.25-3= 11.25 units

area=11.25*11.25=126.5625 sq units

You might be interested in
Geometry question for homework.
mars1129 [50]

So remember that the distance formula is \sqrt{(x_2-x_1)^2+(y_2-y_1)^2} .

1.

\sqrt{(4-4)^2+(-2-(-5))^2}\\ \sqrt{0^2+3^2}\\ \sqrt{0+9}\\ \sqrt{9}\\ 3

Distance between (4,-5) and (4,-2) is 3 units.

2.

\sqrt{(1-(-1))^2+(1-4)^2}\\ \sqrt{2^2+(-3)^2}\\ \sqrt{4+9}\\ \sqrt{13}

Distance between (1,1) and (-1,4) is √13 (or 3.61 rounded to the hundreths) units.

3 0
3 years ago
If f(x) = 4x ^ 2 and g(x) = x + 1 , find (fg)(x) ).
Irina-Kira [14]

Answer:

\boxed{\sf \ C \ is \ the \ correct \ answer \ ! \ }

Step-by-step explanation:

fog(x)=f(g(x))

so it comes

f(g(x))=f(x+1)=4(x+1)^2

<u>so C is the correct answer</u>

7 0
3 years ago
Read 2 more answers
Annie has a compost pile that produces 12 pounds of compost a day from yard waste. Which function expresses the amount of compos
Masteriza [31]
The total amount of compost Annie gets is 12 every day
c equals 12 every d
c = 12d
7 0
3 years ago
Read 2 more answers
Help again! Just these last 3 questions. I don't wanna beg for answers, but I need help thank you. This assis due in a few minut
lana [24]

Answer:

Question 4: 20 + 6 + 6 + 12 + 16 = 60 yd^{2}

Question 5: 144 + 90 + 90 + 48 + 48 = 420 m^{2}

Question 6: 78.28 + 78.28 + 88.58 + 27.09 + 27.09 = 299.32 ft^{2}

Step-by-step explanation:

Hope this helps!

6 0
2 years ago
rock is thrown upward with a velocity of 27 meters per second from the top of a 23 meter high cliff and it misses the cliff on t
ahrayia [7]

the rock will be at 11 meters from the ground level after 5.92 seconds

Step-by-step explanation:

The motion of the rock is a free-fall motion, since the rock is acted upon the force of gravity only. Therefore, it is a uniformly accelerated motion, so its position at time t is given by the equation:

y=h+ut+\frac{1}{2}at^2

where

h = 23 m is the initial height

u = 27 m/s is the initial velocity, upward

a=g=-9.8 m/s^2 is the acceleration of gravity, downward

t is the time

We want to find the time t at which the position of the rock is

y = 11 m

Substituting and re-arranging the equation, we find

11=23+27t-4.9t^2\\4.9t^2-27t-12=0

This is a second-order equation, which has solutions:

t=\frac{27\pm \sqrt{(-27)^2-4(4.9)(-12)}}{2(4.9)}=\frac{27\pm \sqrt{964.2}}{9.8}

So

t_1 = -0.41 s

t_2=5.92 s

The first solution is negative so we neglect it: therefore, the rock will be at 11 meters from the ground level after 5.92 seconds.

Learn more about free fall:

brainly.com/question/1748290

brainly.com/question/11042118

brainly.com/question/2455974

brainly.com/question/2607086

#LearnwithBrainly

8 0
3 years ago
Other questions:
  • If 3x + 5 = 15, what is the value of the expression (3x + 2)(3x + 3)(3x + 4)?
    6·2 answers
  • What is $800 divided by blank =$ 80?
    11·2 answers
  • 12 7/12 subtracted by 5 14/5
    12·1 answer
  • What's the sum of 700 and 800
    14·1 answer
  • How do you eliminate the fractions on this to solve by elimination ????????
    15·2 answers
  • Can someone help me and work it out plzzzz
    7·1 answer
  • A square pyramid is shown sitting on its base.
    15·1 answer
  • Marissa is painting her rectangular patio, with the exception of a bench that does not need to be painted:
    6·1 answer
  • Choose the expression for 9 decreased by 9
    5·1 answer
  • Type the correct question of the line
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!