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ddd [48]
3 years ago
7

Show the following conjectures are false by finding a counterexample.

Mathematics
1 answer:
Julli [10]3 years ago
3 0

''All prime numbers are odd."

That is incorrect because if we consider the smallest odd number, 2, is an even number. We can say that except 2, all prime numbers are odd.

14. section is wrong. For example, both numbers can be negative, so when we multiple these two, it will equals a positive value.

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What is the measure of Arc BA? An explanation would be much appreciated.
yKpoI14uk [10]

Answer:

m<BA = 180degrees

Step-by-step explanation:

First you must know that measure of <BA is 180 degrees and m<CD = m<BA

Since <CD = 16z - 12, hence;

180 = 16z - 12

16z = 180++12

16z = 192

z = 192/16

z = 12

Get <BA

m<BA = 16z - 12

m<BA = 16(12) - 12

m<BA = 192 - 12

m<BA = 180degrees

8 0
3 years ago
Someone please help me with my homework
spin [16.1K]
Answer: 
20700 feet per hour

Explanation: 
Convert 345 feet per minute to 345 feet per hour. 
First find how many minutes are in an hour:
60 minutes = 1 hour. 
1 minute • 60 = 1 hour
345 feet • 60 = 20700 feet per hour.
3 0
3 years ago
Yu Xing paid 3.60 dollar for 2 pens after a 10 percent discount .What was the usual price of 1 pen.
notka56 [123]

Answer:

2 $

Step-by-step explanation:

let the original price be x

price after 10% discount = 3.60$

x -  \frac{10}{100} \times x = 3.60

\frac{100x - 10x}{100}  = 3.60 \\  \frac{90x}{100}  = 3.60 \\ 9x = 36 \\ x = 4

The original price of 2 pens is 4$

original price of one pen = 4/ 2

<u>= 2 $</u>

8 0
3 years ago
What is the value of x: -7x = -2x + 15​
Art [367]

Answer:

-3

Step-by-step explanation:

-7x=-2x+15

collect like terms

-7x+2x=15

-5x=15

divide both sides by -5

x=15/-5

x=-3

6 0
3 years ago
Read 2 more answers
a wall on the side of a building is made up of 52 rows of bricks with 44 bricks in each row. how many bricks make up the wall
sveta [45]
There are a total of 2,288 bricks that make up the wall.
5 0
3 years ago
Read 2 more answers
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