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Zinaida [17]
3 years ago
12

Tran says that -1/4x-7+9/4x+2x is equivalent to 4x-7. How can substituting any value for x help you determine whether Tran is co

rrect? Is Tran correct? Use substitution to justify your answer
Mathematics
1 answer:
Reil [10]3 years ago
5 0

Answer:

yes, Tran is correct.

Step-by-step explanation:

−1/4x+ −7+9/4x+2x

(−1/4x+9/4x+2x)+(−7)

4x+−7

Hope it helps

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Car travels 360 miles on 18 gallons of gas. Write the unit rate.
mars1129 [50]

360/18=20

So, your answer is 20 unit rate.

Hope this will help you!

5 0
4 years ago
K - 2( k - ( 2- k ) - 2
mamaluj [8]
Assuming the missing parenthesis is at the end the simplified answer should be k-8
5 0
3 years ago
By [n][n] we denote the set {1,…,n}. A function f:[m]→[n] is called monotone if f(i) \leq f(j)f(i)≤f(j)whenever i < ji
Dafna11 [192]

Answer:

There are a total of  { 6 \choose 3} = 20 functions.

Step-by-step explanation:

In order to define an injective monotone function from [3] to [6] we need to select 3 different values fromm {1,2,3,4,5,6} and assign the smallest one of them to 1, asign the intermediate value to 2 and the largest value to 3. That way the function is monotone and it satisfies what the problem asks.

The total way of selecting injective monotone functions is, therefore, the total amount of ways to pick 3 elements from a set of 6. That number is the combinatorial number of 6 with 3, in other words

{6 \choose 3} = \frac{6!}{3!(6-3)!} = \frac{720}{6*6} = \frac{720}{36} = 20  

3 0
3 years ago
Allen started to save money from his daily allowance. In the first week he saved $5.8 and every next week $3.6 more than the pre
Vikentia [17]

Answer: $16.60

Step-by-step explanation:

5.80+ 3.60= 9.40+ 3.60= 13.00+ 3.60= 16.60

So after 4 weeks he earned $16.60

6 0
4 years ago
Read 2 more answers
An experienced roofer can work twice as fast as her helper. working together, they can shingle a new section of roof in 4 hours.
AlladinOne [14]
For this case, the first thing we must do is define variables.
 We have then:
 x: amount of time the assistant works
 Y: amount of time the experienced person works
 We then have the following system of equations:
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 y = (1/2) x
 Solving the system we have:
 x = 8/3
 y = 4/3
 Answer:
 
It would take the roofer, working alone, to complete the same job about:
 
y = 4/3 hours
8 0
4 years ago
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