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
Artyom0805 [142]
3 years ago
14

A rectangular piece of cardboard is 15 inches longer than it is wide. A 5-inch square is cut from each corner, and the remaining

piece is folded to form a box. If the volume of the box is 1,250 cubic inches, what is the length of the box?
A.25 inches
B.30 inches
C.35 inches
D.40 inches

Mathematics
1 answer:
HACTEHA [7]3 years ago
7 0
Let x be the width of the cardboard, then the length is x+15. If 5 unches square is cut from each corner, then the new length is x+15-5·2=x+5 and the new width is x-5·2=x-10. The height of the formed box is 5 in. Now you can find the box volume:

V=\text{ width }\cdot \text{ length }\cdot \text{ height },\\ V=(x-10)\cdot (x+5)\cdot 5,\\ V=5(x^2-5x-50).


If the volume of the box is 1,250 cubic inches, then


5(x^2-5x-50)=1250,\\ x^2-5x-50=250,\\ x^2-5x-300=0,\\ D=(-5)^2-4\cdot (-300)=25+1200=1225,\\  \sqrt{D} =35,\\ x_{1,2}=\dfrac{5\pm 35}{2} =20,-15.


The length of the box is x+5=20+5=25 in. (the negative x is extra, because the length couldn't be negative).


Answer: the length of the box is 25 inches.

You might be interested in
Evaluate the expression. 5^2−4⋅6+11 Enter your answer in the box.
mart [117]

Explanation:

This question's it's about the order of operations. P-parenthesis, E-exponents, M-multiply, D-divide, A-add, and S-subtract. It can also go left to right.

Do exponents first.

5^2=5*5=25

25-4*6+11

Then, multiply left to right.

4*6=24

25-24+11

And add/subtract left to right.

25-24=1

1+11=12

\boxed{=12}

Hope this helps!

Thanks!

Have a great day!


6 0
2 years ago
A bakery offers a sale price of 3.50 for 4 muffins.What is the price per dozen
hammer [34]
1
3.50
3.50
+3.50
______
10 .50
6 0
2 years ago
Which statements about the local maximums and minimums for the given function are true? Choose three options.
Nostrana [21]

Answer:

Over the interval [2, 4], the local minimum is –8.

Over the interval [3, 5], the local minimum is –8.

Over the interval [1, 4], the local maximum is 0.

Step-by-step explanation:

The true statements are:

Over the interval [2, 4], the local minimum is –8.

Over the interval [3, 5], the local minimum is –8.

Over the interval [1, 4], the local maximum is 0.  

Lets discuss each option one by one:

Over the interval [1, 3], the local minimum is 0

This is a false statement. Look at the graph. The minimum point given is (3.4,-8). Therefore the local minimum is -8 not 0

Over the interval [2, 4], the local minimum is –8.

This statement is true because the given minimum point is(3.4, -8). Thus the  local minimum is -8 which is true

Over the interval [3, 5], the local minimum is –8.

According to the given minimum point, the local minimum  is -8 which is true

Over the interval [1, 4], the local maximum is 0.

Look at the graph. The maximum point given is (2,0). Thus this statement is true because local maximum is 0.

Over the interval [3, 5], the local maximum is 0.

This is a false statement because there is no maximum point

8 0
3 years ago
Read 2 more answers
From the information in the graph, which team showed the least amount of improvement over last year?
Ksenya-84 [330]

Answer:

The rangers

Step-by-step explanation:

Their number of wins didn't go up. In fact their wins decreased the most.

5 0
3 years ago
Read 2 more answers
What is the mode of this data set? {8, 11, 20, 10, 2, 17, 15, 5, 16, 15, 25, 6}
lidiya [134]
The mode is what appears the most so 15 is the answer because it appears the most.
8 0
3 years ago
Read 2 more answers
Other questions:
  • PLS HELP / EXPLAIN !!!!
    15·1 answer
  • Spencer rolled a number cube 50 times and recorded the results in this table. Outcome Number 1 8 2 10 3 7 4 7 5 9 6 9 What is th
    13·1 answer
  • Please actually show ur work on how u got the answer thank u
    8·2 answers
  • margery decided to purchase 4 points in order to lower her interest rate on her $150,000 mortgage. how much additional money doe
    9·2 answers
  • How many numbers are between 1 and 100 that are divisible by 2 and 5?
    11·1 answer
  • Did I do this correctly?
    12·1 answer
  • Legs = 20 mm and 27 mm<br> a? + b2 = c2<br> 2 points<br> YOUR QUESTION:<br> 6<br> 20 mm<br> 27 mm
    9·1 answer
  • Which of the following expressions is not equivalent to (-2)(8 +6+-3)?
    11·1 answer
  • 2+(G+5) Please help lol
    15·2 answers
  • This is a 30-60-90 triangle.<br> a<br> What is the measure of x?<br> Х<br> 43<br> X=<br> = [ ?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!