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
SSSSS [86.1K]
3 years ago
15

A cereal box has a volume of 441 cubic inches. Its height is 12 inches, its width is x inches, and its length is (x+7) inches. W

hat is the width of the box?
Mathematics
1 answer:
likoan [24]3 years ago
7 0
Volume = length * width * height 
<span>441 = (x+7) * x * 12 </span>
<span>All you have to do is just find x which is the width. </span>

<span>441 = (x+7) * 12x </span>
<span>441 = 12x2 + 84x </span>
<span>12x2 + 84x - 441 = 0 </span>

<span>Thus you have a quadratic equation with two possible solution. Use the quadratic formula To calculate the x values. If you calculate it, you will find that x = 3.5 and x = -10.5. To prove which one is the width, substitute these values for x one at a time into the volume equation. Lets take x=3.5 </span>

<span>441 = (x+7)+x+12 </span>
<span>441 = (3.5+7) *3.5*12 </span>
<span>441 = 10.5*3.5*12 </span>
<span>441= 441 </span>

<span>If we try -10.5; </span>

<span>441 = (x+7) *x*12 </span>
<span>441=(-10.5+7)*10.5*12 </span>
<span>441 = -3.5*10.5*12 </span>
<span>441 = -441 </span>

<span>Therefore clearly, our answer will be x = 3.5... We don't have to use the substitution to prove our answer is 3.5 because logically we can rule out -10.5 inches of width. Realistically, there can never be a negative width. Therefore your width is 3.5 inches. Hopefully this helps!</span>
You might be interested in
An airplane descends at a rate of 500 feet per minute.Write and evaluate an expression to show how far the plane will descend in
Nataly_w [17]

Answer:

500/6 min if I'm correct

Step-by-step explanation:

8 0
3 years ago
Square root 15*3sqyare root 81y
Deffense [45]
<span>No simplification exists, Root remains :
</span>sqrt(15y) 
7 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7Ba%2Bb%7D%20%7D%7B%5Csqrt%7Ba-b%7D%20%7D%20%2B%5Cfrac%7B%5Csqrt%7Ba-b%7D%20
andrezito [222]

Answer:

\frac{(a+b)}{a^{2} -b^{2}  } + \frac{(a-b)}{a^{2} -b^{2}  } = \frac{2a}{a^{2} -b^{2}  }

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
HELP<br> Find the value of two numbers if their sum is 5 and their difference is 30
vodomira [7]

Answer:

The 2 numbers are -12.5 and 17.5.

Step-by-step explanation:

Let 1 number be x then  x - y  = 30 where the other number is y.

y = x - 30 so the sum is:

x - 30 + x = 5

2x = 35

x = 17.5

and y = 17.5 - 30 = -12.5.

8 0
3 years ago
Read 2 more answers
Can someone help me?
BabaBlast [244]
Both are equal because the distance from AB is equal to RS.
6 0
3 years ago
Other questions:
  • I need help on 25. I know the answer is 2a but I need to see the work. Please help I’ve tried so many possibilities.
    13·2 answers
  • The distribution of vitamin C amount in vitamin drops produced by a given factory is approximately Normal, with a mean of 60.0 m
    7·2 answers
  • 7y 12=-4(y-4)<br><br> a.-1 5/11<br> b.4/11<br> c.-11/16<br> d. 2 3/4
    14·1 answer
  • And one season the top four players on one major league team had batting averages of 0.332, 0.361, 0.343 and 0.360 which is the
    7·1 answer
  • Respond if you need friends
    10·1 answer
  • PLEASE HELP ASAP WILL GIVE BRAINLEIST!!
    8·1 answer
  • Evaluate the following function from this rule:
    11·1 answer
  • What should I draw...... I’m bored<br><br> Examples:
    14·1 answer
  • Find the area of the trapezoid.<br> 95 cm<br> 133 cm
    10·2 answers
  • If WX= 82 cm, find the length of YZ. (OV = 9cm and OV is perpendicular to YZ)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!