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
dusya [7]
3 years ago
10

A 120-inch strip of metal 12 inches wide is to be made into a small open trough by bending up two sides on the long side, at rig

ht angles to the base. The sides will be the same height, x. If the trough is to have a maximum volume, how many inches should be turned up on each side?
Mathematics
1 answer:
mezya [45]3 years ago
3 0

Answer:

x= 3 inch should be turned up on each side

Step-by-step explanation:

Let the height of trough be x.

Width of trough be 12 - 2x.

and length of trough = 120 inch

Volume of trough, V = L×W×H = 120 × (12-2x) × x = 120x(12 - 2x)

For maximum volume, we find V' = 0

i.e 1440 -480x = 0

or  x = \frac{1440}{480}

or  x= 3

Hence x= 3 inch should be turned up on each side

You might be interested in
(9+4c)+(2+3x) add timed so hurry!
Luba_88 [7]

Answer: 3x + 4c + 11

Step-by-step explanation: Combine like terms.

5 0
3 years ago
Convert into percentages 7/25
LekaFEV [45]

Answer:

28%

Step-by-step explanation:

<u>Divide the numerator by the denominator in order to convert this fraction into a decimal.</u>

7/25 = 0.28

<u>Multiply the decimal by 100 to convert into a whole number.</u>

.28 * 100 = 28

<u>7/25 converted into a percent is 28%.</u>

8 0
3 years ago
Find (3) if<br> f(x)=x2 + 2x2-x-1
Olenka [21]

Answer:

The correct answer is:

f(3)=23

Step-by-step explanation:

By evaluating first, and then the mathematical calculation, we have:

f(3)= 3^{2} + 2 ×3^{2} - 3 -1 

= 9 +18 -3-1  

= 23

7 0
3 years ago
3 octagons 4 Pentagons 2 trapezoids how many sides are on the shapes altogether
klio [65]

Answer:

52 Sides

Step-by-step explanation:

Octagons have 8 sides so 3 x 8 = 24

Pentagons have 5 sides so 4 x 5 = 20

Trapezoids have 4 sides so 2 x 4 = 8

Add it all up and it equals 52 sides in total

8 0
3 years ago
Gianna put $1000 in a savings account for 18 months, The interest on the account is 3.5%. How much will Gianna earn in interest?
zimovet [89]

Answer:

amount of interest = 52.5

amount at the end of the period = 1052.5

Step-by-step explanation:

use the formula for simple interest

PRT/100

P is the principle

R is the rate of interest charged

T is the Time taken

18 months  = 1 years 6 months ( 1.5 years)

1000 * 3.5 * 1.5 = 5250

5250/100 = 52.5

the amount of interest = <u>52.5</u>

the amount she will have at the end of the period

= 1000 +52.5

= <u>1052.5</u>

8 0
2 years ago
Other questions:
  • Will give brainliest to person who answers first. Much appreciated:)
    13·2 answers
  • Oberon Cell Phone Company advertises service for 10 cents per minute plus a monthly fee of $35.00.
    13·1 answer
  • A group of 5 students are running a relay race. If the race is 1/4 of a mile long and each student runs the same distance how fa
    11·2 answers
  • I am not really sure how to solve these and I really need an explanation..
    11·1 answer
  • Please help me on this, thank u
    7·1 answer
  • NEED HELP, REALLY URGENT!! Will mark Brainliest for the right answer!!!​
    15·1 answer
  • What is 54.77 rounded to the nearest tenth ?
    15·1 answer
  • What is the surface area of a trapezoid prism with base 1 = 9 and base 2 = 11 and height of 10. the Height of the prism is 10?
    15·1 answer
  • Please help this is confusing me:(
    10·1 answer
  • Williamston Daily is a new daily newspaper. When they first started printing three years ago they had 5900 home
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!