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
Dima020 [189]
2 years ago
6

If the necklace has 20 star shaped beads, how many total beads are on the necklace? Explain

Mathematics
1 answer:
goldenfox [79]2 years ago
6 0
For example: 18-inch princess necklace made with 4mm beads: 18 x 25.4 ÷ 4 = 114.3. 32-inch opera necklace made with 10mm beads: 32 x 25.4 ÷ 10 = 81.2.

Necklace?
Type Length
Collar 14 to 17 inches
Choker 16 to 18 inches
Princess 17 to 19 inches
Matinee 20 to 25 inches
You might be interested in
Tell whether the angles are adjacent or vertical. Then find the value of x. x =?
baherus [9]

Answer:

The triangle of the 360 squared by the square

8 0
2 years ago
I NEED HELP please!!
swat32

9514 1404 393

Answer:

  (c)  11

Step-by-step explanation:

As x goes up by 1, f(x) goes up by 2. The next line of the chart would be ...

  x = 4+1 = 5; f(x) = 9+2 = 11

The appropriate choice is f(5) = 11.

5 0
3 years ago
You are a lifeguard and spot a drowning child 60 meters along the shore and 40 meters from the shore to the child. You run along
sukhopar [10]

Answer:

The lifeguard should run across the shore a distance of 48.074 m before jumpng into the water in order to minimize the time to reach the child.

Step-by-step explanation:

This is a problem of optimization.

We have to minimize the time it takes for the lifeguard to reach the child.

The time can be calculated by dividing the distance by the speed for each section.

The distance in the shore and in the water depends on when the lifeguard gets in the water. We use the variable x to model this, as seen in the picture attached.

Then, the distance in the shore is d_b=x and the distance swimming can be calculated using the Pithagorean theorem:

d_s^2=(60-x)^2+40^2=60^2-120x+x^2+40^2=x^2-120x+5200\\\\d_s=\sqrt{x^2-120x+5200}

Then, the time (speed divided by distance) is:

t=d_b/v_b+d_s/v_s\\\\t=x/4+\sqrt{x^2-120x+5200}/1.1

To optimize this function we have to derive and equal to zero:

\dfrac{dt}{dx}=\dfrac{1}{4}+\dfrac{1}{1.1}(\dfrac{1}{2})\dfrac{2x-120}{\sqrt{x^2-120x+5200}} \\\\\\\dfrac{dt}{dx}=\dfrac{1}{4} +\dfrac{1}{1.1} \dfrac{x-60}{\sqrt{x^2-120x+5200}} =0\\\\\\  \dfrac{x-60}{\sqrt{x^2-120x+5200}} =\dfrac{1.1}{4}=\dfrac{2}{7}\\\\\\ x-60=\dfrac{2}{7}\sqrt{x^2-120x+5200}\\\\\\(x-60)^2=\dfrac{2^2}{7^2}(x^2-120x+5200)\\\\\\(x-60)^2=\dfrac{4}{49}[(x-60)^2+40^2]\\\\\\(1-4/49)(x-60)^2=4*40^2/49=6400/49\\\\(45/49)(x-60)^2=6400/49\\\\45(x-60)^2=6400\\\\

x

As d_b=x, the lifeguard should run across the shore a distance of 48.074 m before jumpng into the water in order to minimize the time to reach the child.

7 0
3 years ago
PLEASE HELP!!!!!!!!!
notka56 [123]

Answer:

thyx

Step-by-step explanation:

sakfjy

7 0
3 years ago
Multiple choice please help!!
AveGali [126]

3 and 4

Step-by-step explanation:

y=5x

y=5(0)

y=0

y=5x

y=5(10)

y=50

y=5x

y=5(51)

y=255

y=5x

y=5(400)

y=2000

5 0
2 years ago
Other questions:
  • A building that is 100 for tall casts a shadow that makes a 30 degree angle. Approximately how long in feet is the shadow across
    15·2 answers
  • Whats 126545 x 14569865 x 45645158 x 56453258?
    9·2 answers
  • Light travels about 180 million kilometers in 10 minutes. How far does it travel in one minute? How far does it travel in one se
    5·2 answers
  • Diego is solving the inequality 100 − 3x ≥ -50. He solves the equation 100 − 3x = -50 and gets x = 50. What is the solution to t
    10·2 answers
  • Which system of linear inequalities is shown in the graph
    13·1 answer
  • Who believed that humans should<br> not base beliefs on tradition or<br> authority
    13·1 answer
  • Margarite owns a boutique. She sells her jewelry at a 30% markup. If she buys a bracelet for $22, what would she sell it for aft
    15·1 answer
  • Listen Rachel babysat three children for five hours if they were paid $2.50 per hour for each child and divided their earnings e
    10·1 answer
  • A food bill is $44.00 and you want to leave a 20% tip. How much money is the tip?
    13·2 answers
  • 3010 divided by .20 = ?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!