MATHEMATICS HIGH SCHOOL

The set of integers is closed under subtraction.
True
False
The set of integers is closed under subtraction. True False - 1

Answers

Answer 1
Answer: The answer of the  integers is closed  under subtraction is  False
Answer 2
Answer:

Answer:

false

Step-by-step explanation:

Related Questions

Can anyone help me?
What is 2+x/5+x=7/8?
Help i need help with this question.
Which sum or difference identity would you use to verify that cos (180° - q) = -cos q?
What is the answer..........

David wants to hang a mirror in his room. The mirror and frame must have an area of 8 square feet. The mirror is 2 feet wide and 3 feet long. Which quadratic equation can be used to determine the thickness of the frame, x?2x2 + 14x − 2 = 0
3x2 + 10x − 8 = 0
4x2 + 10x − 2 = 0
x2 + 7x − 8 = 0

Answers

Represent the thickness of the frame by x. Framing the mirror will increase both its length and width by 2x. The area of the mirror with the frame is the product of the length and width which can mathematically be expressed as,                                 

                                               A = (3 + 2x)(2 +2x) = 8

The equation above can be simplified into 4x^2 + 10x -2 = 0. This equation can still be further simplified by dividing it by 2. However, it will give an answer which is not found on the choices. Thus, the answer is the third choice. 

Answer: The answer above me is correct .

Need help with this

Answers

Answer:

Its b

Step-by-step explanation:

Divide 180 in a ratio of 4:5:9

Answers

ratio in which 180 should be divided is 4:5:9
firstly we need to find the total number of portions 
this we can find by adding all the numbers making up the ratio 
4 + 5 + 9 = 18
180 is made of 18 portions 
size of 1 portion = 180 / 18 = 10
when dividing 180 into the respective ratio 4:5:9 the portions are as follows
4 x 10 = 40
5 x 10 = 50
9 x 10 = 90
therefore when we divide 180 in the ratio 4:5:9
the answer we get is
40 :50: 90

There are 49,000 seats in a sports stadium. Tickets for the seats in the upper level sell for $25, the ones in the middle level cost $30 and the ones in the lower level are $35 each. The number of seats in the middle and bottom levels together equal the number of seats in the upper level. When all of the seats are sold for an event, the total revenue is $1,419,500. How many seats have been sold in the upper level?

Answers

u- amount of upper level tickets which cost 25$
m-amount of middle level tickets which cost 30$
b-amount of bottom level tickets which cost 35$

m+b=u and
m+b+u=49000 and
25u+30m+35b=1419500

putting u from first equation to the second
2u=49000
u=24500 - seats in upper level
m+b=24500 so m=24500-b
25*24500+30(24500-b)+35b=1419500
612500+735000-30b+35b=1419500
1347500+5b=1419500
5b=72000 /:5
b=14400 amount of seads in bottom level

Horses are measured in units called hands. One inch equals 1/4 hand. The average Clydesdale is 17 1/5 hands tall. What is the height in inches? In feet?

Answers

Clydesdale is 17 1/5 hands tall then the height in inches is 68.8 inches and the height in feet is 5.73ft and this can be determined by using arithmetic operations and the unitary method.

Given :

  • Horses are measured in units called hands.
  • One inch equals 1/4 hand.
  • The average Clydesdale is 17 1/5 hands tall.

The following steps can be used to determine the height in inches:

Step 1 - Clydesdale height in hands unit is:

17(1)/(5)=(86)/(5)

Step 2 - Now, if one inch equals 1/4 hands then 86/5 is equal to:

=((86)/(5))/((1)/(4))

Step 3 - Multiply 86/5 and 4/1.

=(86)/(5)* (4)/(1)

Step 4 - Multiply 86 and 4.

=(344)/(5* 1)

Step 5- Further simplify the above expression.

\rm =68.8\;inches

Now, to convert inches in feet use:

1 inch = 0.08333 feet

So, if 1 inch is equal to 0.0833 feet then 68.8 inches is equal to:

=(68.8)/(1)* 0.0833

= 5.73 ft.

For more information, refer to the link given below:

brainly.com/question/24406804
1 inch = 1/4 hand, that means 1 hand = 1*4 = 4 inch.
17 1/5 = [85 + 1]/5 = 86/5,
86/5 hand = 86/5 * 4 = 344/5 = 68.8 inch, 
1 feet = 12 inch, 
68.8 inch = 68.8/12 = 5.73 feet. 
Avg. Clydesdale height = 17 1/5 hand = 68.8 inch = 5.73 feet.

Use cross products to demonstrate whether the two ratios are equivalent in this problem: 4 over 6 times 14 over 21

Answers

Determine if the two ratios are equivalent in this problem

The two ratios are equivalent

Given:

4 over 6 times 14 over 21

Times mean multiplication (×) in mathematics

Over means division (÷ or /) in mathematics

So,

4 over 6 times 14 over 21

= 4/6 × 14 / 21

Equate both ratio

4/6 = 14/21

cross product

(4 × 21) = (6 × 14)

84 = 84

Therefore, the two ratios are equivalent

Read more:

brainly.com/question/24425126
4/6 = 14/21When using cross product always multiply the left fractions numerator times the right side fractions denominator and the left side fractions denominator times the right side fractions numerator4×21 = 6×1484=84They are equivalent because they both equal 84
Other Questions
What’s the answer to this
a student earns a 90 on a test for missing one question incorrectly and earns a 70 for answering three incorrectly.What is the slope?
In a train yard, there are 6 flatcars, 7 boxcars, and 3 livestock cars. A train is made up of 9 cars.Which would you use to find the number of ways the train could be made up?
A local television station sells time slots for programs in 30-minute intervals. If the station operates 24hrs per day, every day of the week, what is the total number of 30-minute time slots the station can sell for tuesday and wednesday?