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
Veronika [31]
3 years ago
8

An oil tanker can be emptied by the main pump in 4 hours. An auxiliary pump can empty the tanker in 7 hours. If the main pump is

started at 5 PM​, when should the auxiliary pump be started so that the tanker is emptied by 8 PM​?
Mathematics
1 answer:
Taya2010 [7]3 years ago
8 0

Answer: 1:00

Step-by-step explanation: if you start at 12:00 then you finish at 7:00 if you start at 1:00 then both finish by 8:00

You might be interested in
Use the following information for questions 1 through 6. The dietitian at a camp is planning breakfast for the first day of camp
Dima020 [189]

Answer:

Let x and y be the pieces of toast and sausage required.

Then the objective function is

Min Z=0.04x+0.08y

Constraints:

Vitamin A, 2x+4y≥20

Vitamin B, 3x+1.5y≥15

Iron, 2x+2y≥16

Sausage, y≤4

The non-negative constraints are x≥0, y≥0

Thus, the linear programming model is

Min Z=0.04x+0.08y

Subject to,

2x+4y≥20

3x+1.5y≥15

2x+2y≥16

y≤4

x≥0, y≥0

1) There are two variables in the LP model. So, option (B) is correct.

2) The LP model contains four constraints (excluding the non negative constraints). So, option (D) is correct.

3) Solving the LP model using a software, we get the solution as

z=0.4, at x=6 and y=2

So, The cost of the breakfast is $ 0.4. Option (B) is correct.

4) The breakfast should contains 6 toasts.

5) The amount of Vitamin B in the breakfast = 3(6)+1.5(2)=18+3=21 milligrams. So, option (C) is correct.

6) The amount of Iron in the breakfast= 2(6)+2(2)=12+4=16 milligrams. So, option (B) is correct.

Step-by-step explanation:

4 0
3 years ago
Can you guys help me with this?
zvonat [6]

Answer:

The leghts of AB is 9 because both of the triangles are symmetrical. But also, this is a Equilateral triangle, which means that both of the sides are the same lengths (AB=AC)

6 0
3 years ago
Read 2 more answers
What is the general term equation, an, for the arithmetic sequence 5, 1, â3, â7, . . . , and what is the 21st term of this seque
Valentin [98]
Hello :

the nth term ( general term  of an arithmetic sequence is :

An =A1+(n-1)d   ....a common difference is : d , A1 : the first terme
A1 = 5    and : d = 1 - 5 = - 4    n = 21
A21 = 5 + (21 -1)(-4)
A21 = 5 - 80 = -75

<span>                                      
</span>

3 0
3 years ago
In triangle ABC, angle A measures 40º and angle B measures 60º. In triangle PQR, angle P measures 40º and angle Q measures 80º.
Soloha48 [4]

Answer:

Latoya's statement because they are similar not congruent

4 0
2 years ago
Consider the circles A, B, C, and D. SOMEONE PLEASE HELP ASAPPPP THANKS!!!
Zepler [3.9K]

Answer:

a= d and b= b

Step-by-step explanation:

circumference falls hand and hand with diameter and radius

a has a circumference of about 301 inches

b is about 62 inches

c is about 75 inches

d is about 314

8 0
3 years ago
Read 2 more answers
Other questions:
  • Landry earned $2,300 over the summer and decided to invest it in an account that earns 4% annual compound interest. If Landry do
    6·2 answers
  • What is the highest common factor of 150 and 135
    9·1 answer
  • Find two different planes whose intersection is theline:x = 6 + 3ty = -8 - 3tz = -1 - tWrite equations for each plane in the for
    8·1 answer
  • What are other equations for (12-4) x7 =x
    8·1 answer
  • What is -1 and 3/5 divided by -2/3? As a fraction.
    9·1 answer
  • How do i solve 2/7v-1/7+14=20
    10·2 answers
  • Someone please help me thank you
    8·1 answer
  • 0.4 / 17= what i need help this is ilx ​
    13·2 answers
  • I need help with these please
    8·1 answer
  • 3.45 x 2.3. Whats the answer?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!