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
quester [9]
3 years ago
12

Five sisters - Alexandra, Emily, Lisa, Martha, and Laura decide to purchase a big screen TV as a birthday gift for their mother.

- Martha agrees to pay 20% of the cost -Emily gives $75 -Alexandra pays 25% of the cost -Laura gives $75 - Lisa contributes one-half of the cost. What is the total cost of the big screen Tv? What amount will each sister pay?
Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
8 0

Answer:

  • Total cost: $3000
  • Martha: $600
  • Emily: $75
  • Alexandra: $750
  • Laura: $75
  • Lisa: $1500

Step-by-step explanation:

The percentages add to 95%, so the dollar amounts (total $150) comprise 5% of the cost. Then the total cost is ...

  total cost × 5% = $150

  total cost = $150/0.05 = $3000

And the percentages are ...

  20% × $3000 = $600 (Martha's share)

  25% × $3000 = $750 (Alexandra's share)

  50% × $3000 = $1500 (Lisa's share)

_____

<em>Check</em>

$600 + 75 + 750 + 75 + 1500 = $3000 . . . as it should

You might be interested in
PLEASE HELP REALLY URGENT!!
yawa3891 [41]

Part A

F = 50 N is the force applied along the purple vector

r = 1.5 is the radius (half the diameter 3)

theta = 110 is the angle in which the force vector is applied

Use this formula to plug in the values to find the torque T

T = F*r*sin(theta)

T = 50*1.5*sin(110)

T = 70.4769

<h3>Answer: The torque applied is approximately 70.4769 Newton-meters</h3>

=========================================

Part B

Refer back to the formula in part A. If theta is the variable, then T maxes out when theta = 90 degrees, because sin(theta) is maxed out at 1 here. If theta = 90, then T = F*r. The torque is maxed out when the force vector is perpendicular to the original position vector, this way you get the most push leading to the highest twisting or turning force possible.

<h3>Answer: 90 degrees</h3>

=========================================

Part C

Use the values from part A, but make theta = 90 so that the torque T is maxed out. So we would get the following

T = F*r*sin(theta)

T = 50*1.5*sin(90)

T = 50*1.5*1

T = 75

<h3>Answer: The max torque possible is 75 Newton-meters</h3>
8 0
3 years ago
It took a sled dog team 8.5 hours to travel 161.5 Kilometers. What was the average speed of the sled dog team in Kilometers per
BartSMP [9]

Answer:

19

Step-by-step explanation:

because 161.5/8.5=19

This is because you divide the distance by the time

6 0
3 years ago
Read 2 more answers
Let f(x)=2x−1. If 3f(a)=15, what is the value of f(2a)?
Misha Larkins [42]
The answer is 7.

f(a) = 2a-1, 3f(a) = 3(2a-1) = 15 -> a=2 so f(2a)=f(4)=7
3 0
3 years ago
Please help I have no clue how to do this​
Alinara [238K]

Step-by-step explanation:

It's a question of trigonometry.

You need to remember that tangent (tan) stands for Perpendicular / Base.

So, tan P = QR / PR

By Pythagoras Theorem,

34² = 30² + x²

x² = 34² - 30²

x² = 1156 - 900

x² = 256

x = 16

Now, placing the values,

tan P = 30 / 16

tan P = 1.875

HOPE IT HELPS ^_^

5 0
3 years ago
A professional diver began to descend at a rate of 9 feet per minute after jumping into the ocean at a depth of 7 feet. Which of
klemol [59]

See what you can do like ask what the change is

8 0
3 years ago
Other questions:
  • Divide, and then round the answer to two decimal places: 0.3572928 ÷ 0.419
    10·1 answer
  • The volumes of two similar solids are 512 cm3 and 2,197 cm3. If the smaller solid has a surface area of 960 cm2, find the surfac
    11·2 answers
  • What is the x-coordinate of the solution to the system of equations 3x-2y=-30 6x+3y=3
    9·1 answer
  • Un moviz parte del repeso y coure una
    15·1 answer
  • Quan bought 8.6 meters of fabric.how many centimeters of fabric did he buy
    6·1 answer
  • Explain what a stretch is
    13·1 answer
  • What is the value of x? circle the correct answer of 23x=115 .x=7 or x=5
    10·1 answer
  • How do u start your car with an EFI system
    6·1 answer
  • Delaney wants to start saving money to buy a 3-D printer. If she needs to save at least $300.00 to pay for it and has decided to
    6·1 answer
  • inside temperature y after x hours can be represented by y=68x. come park the functions by comparing the temperatures
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!