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Kryger [21]
3 years ago
13

In a batch of 890 calculators, 12 were found to be defective. What is the probability that a calculator chosen at random will be

defective? Write the probability as a percent. Round to the nearest tenth of a percent if necessary. 1.8% 98.7% 74% 1.3%
Mathematics
1 answer:
jarptica [38.1K]3 years ago
4 0
890 times 12 equals 10680
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you take a group of 20 people going to the movies. kids’ tickets cost $4 each, and adults tickets $6 each. your total cost is $9
brilliants [131]

The number of kids in your group is 12.

Step-by-step explanation:

Given,

Number of people = 20

Cost of each kid ticket = $4

Cost of each adult ticket = $6

Total spent = $96

Let,

x be the number of kids ticket

y be the number of adult ticket

According to given statement;

x+y=20     Eqn 1

4x+6y=96    Eqn 2

Multiplying Eqn 1 by 4

4(x+y=20)\\4x+4y=80\ \ \ Eqn\ 3

Subtracting Eqn 3 from Eqn 2

(4x+6y)-(4x+4y)=96-80\\4x+6y-4x-4y=16\\2y=16

Dividing both sides by 2

\frac{2y}{2}=\frac{16}{2}\\y=8

Putting y=8 in Eqn 1

x+8=20\\x=20-8\\x=12

The number of kids in your group is 12.

Keywords: linear equation, elimination method

Learn more about elimination method at:

  • brainly.com/question/8907574
  • brainly.com/question/8790374

#LearnwithBrainly

5 0
3 years ago
The three angle bisectors of ΔABC intersect at point P. Point P is the
lisabon 2012 [21]
<h3>Answer: C) incenter</h3>

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

Explanation:

If you were to intersect the angle bisectors (at least two of them), then you would locate the incenter. The incenter is the center of the incircle which is a circle where it is as large as possible, but does not spill over and outside the triangle. Therefore this circle fits snugly inside the triangle.

--------------

extra notes:

* The centroid is found by intersecting at least two median lines

* The circumcenter is found by intersecting at least two perpendicular bisector lines

* The orthocenter is found by intersecting at least two altitude lines

* The incenter is always inside the triangle; hence the "in" as part of the name. The centroid shares this property as well because the medians are completely contained within any triangle. The other two centers aren't always guaranteed to be inside the triangle.

* The red lines cut each angle of the triangle into two equal or congruent pieces.

5 0
3 years ago
Alex mows a lawn that measures 800 square feet in
Darina [25.2K]

First thing we gotta do is find the unit rate:

800 divided by 2.5 = 320

And now your problem is complete! The unit rate or square foot per hour is 320 square feet per hour!

Hope this helps, if not, comment below please!!!

5 0
3 years ago
Piz help me!!!!<br><br><img src="https://tex.z-dn.net/?f=look%20%5C%3A%20at%20%5C%3A%20pic%20%5C%3A%20piz" id="TexFormula1" titl
s344n2d4d5 [400]
Here is my solution to this question worked out on paper:

7 0
3 years ago
1
Westkost [7]

The difference between the two mass is 151950g

Data;

  • Mass a = 29.48kg
  • Mass b = 181,430g
<h3>Difference Between The Mass</h3>

To calculate the difference between the mass, we must do so in the same unit. i.e both mass a and mass b must be in the same unit.

<h3>Conversion of Mass from Kg to g</h3>

Let's convert mass a from kg to g

1kg = 1000g

Using this, we can find how many grammes are in 29.48kg

1kg = 1000g\\29.48kg = x\\x = 29.48 * 1000\\x = 29480g

Now we can find the difference between mass b and mass a

b - a = 181430 - 29480 = 151950

The difference between the two mass is 151950g

Learn more on difference between two numbers here;

brainly.com/question/18591813

4 0
2 years ago
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