MATHEMATICS MIDDLE SCHOOL

How many times as great as the value of 3 in 4,385 is the value of 3 in 3,899

Answers

Answer 1
Answer:

Answer:

The value of 3 in 4,385 is 1/10 times the value of 3 in 3,899

Step-by-step solution:

Notice in 4,385, the 3 is in the hundreds thus it represents 300.  

While in 3,899 the 3 is in the thousands thus it represents 3000.

Therefore, the question is how many times as great is the value of 300 respect to the value of 3000.

To answer the question, we just divide:

\displaystyle300/3000=(300)/(3000)=(1)/(10)

Therefore, the value of 3 in 4,385 is 1/10 times the value of 3 in 3,899

Answer 2
Answer: the value of 4385 is 300 and the value of 3899 is 3000☺

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Choose yes or no to tell whether the expression represents a 20% discount off the price of an item that originally costs d dollars.

Answers

Answer:

Option A and C is correct.

Step-by-step explanation:

Discount is defined as a reduced price on something being sold or at a price lower than that item is normally sold for.

For a 20% discount,

Given:

Initial prices = $ d

Discounted price = % discount × original/initial cost

= 20/100 × d

= 0.2 × d

Selling price = original cost - discounted price

= d - 0.2d

= 0.8 × d

= 0.8d

Answer:

A: Yes

B:No

C: Yes

D: No

Step-by-step explanation:

I got 100% on the test with this question. Trust me.

If a cd player costs 49.95 what will your total be if you have to pay a 5% tax

Answers

To figure out the tax in any cost, you simply take the original cost, and multiply it by the tax which is written as 0.05, since it's in percent. once you get your answer, take the original cost and add on to the product you calculated before. ex 0.05 * 49.95 = 2.4975, now add the original price to the product: 2.4975 + 49.95 = 52.4475. Now just take your final answer and round it the proper decimal place which is to the hundredths place: $52.45. Therefore your final price is $52.45.

Hope that helps :)
49.95*.08-3.996

49.95+3.99=53.94

The value of y varies directly with the value of x, and y = –8 when x = 4.Which equations represent the relationship between y and x?

Choose exactly two answers that are correct.
A.y/x=1/2
B.y/x=-2
C.-2x=y
D.x=2y

Answers

B. y / x = - 2 because ( -8 ) / 4 = - 2 ;

so I get how to do the first step but I forgot how to factor it back? can someone explain how please, I want to be able to do it for all of them. thanks

Answers

This problem is an example of difference of squares. 49 is a perfect square root. 
So the answer is (x-7)²
Let me know if you need any more help with these kinds of problems. 

Luke has 27 lots for sale. Each lot is 0.57 acres . How much land does Luke have for sale?

Answers

Multiply 0.57 and 27 together to get 15.39 acres

Is y=4x-5 proportional

Answers

Answer: A proportional relation between two numbers, x and y is when:

y= k*x, where k is a real number.

this is read as "the number y is k times the number x" so y is proportional to x, and the constant of proportionality is k.

The equation in the problem is: y = 4x - 5, here you have an x-intercept equal to -5, this quantity breaks the proportionality relation. So in this case y is not proportional to x.
No it's not proportional because it would be like y=4x. And proportional relationship doesn't have any operation between the “k” and “x” where K is the unit rate or the constant of proportionality!
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