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True [87]
4 years ago
6

Why is it important to solve an equation for a specific variable?

Mathematics
1 answer:
Svetllana [295]4 years ago
8 0
It all depends on the importance of the variable its self. Its important to solve it so you know what the variable is and its important to solve one at a time because its impossible to solve a variable completely if you have two of them
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HELP PLZ
Sladkaya [172]
Given:
Regular price = r
discount rate = 30%
coupon = $5 off any single item at the store

expression: 3(r - 0.3r) - 5

C.) 3(0.7r) - 5 represents the total cost before tax.

3(r-0.3r) - 5 ⇒ 3(0.7r) - 5

The coupon can only be used once because the problem stated any single item not every single item purchased. 



7 0
3 years ago
You practice the piano for 30 minutes each day. Right and solve an equation to find the total time T you spent practicing the pi
Svet_ta [14]

Answer: 30x= T

Step-by-step explanation:

I solved this by first finding the rate of change (or the amount it changes by each day) which is 30. Then I put the variable (or X) after it which represents the number of days. Then it equals T because that’s the total amount of time spent!

8 0
3 years ago
The sum of two numbers is 25. One of the numbers is fifteen less than the other. Find the numbers.
bija089 [108]

20+5 because 5 is 15 less than 25.

4 0
4 years ago
Read 2 more answers
A 2,768–foot–long straight fence has posts that are set 8 feet on center; that is, the distance between the centers of two adjac
salantis [7]

Answer:

No.P=347

Step-by-step explanation:

The fence is 2768 feet long, how many posts should be placed along the fence if the adjacent distance between them is 8 feet?

How to start and end with a post the number of them (No.P) will always be the distance of the fence (f) between the adjacent distance of the posts (p) plus one     No.P = \frac{f}{p}+1= \frac{2768}{8}+1 = 346+1=347

As an example we have graph 1

5 0
3 years ago
Calculate the area of this section of floor in square feet.
ch4aika [34]

Answer:

A total= 0.6703125 ft²

Step-by-step explanation:

A1= 3.9× 14.3= 55.77 in²

A2=1/2 × 14.3× ( 9.6-3.9)= 40.755 in²

A total= A1+ A2= 55.77+40.755=96.525 in²

1 ft= 12 in , 1ft²= 144 in²

Atotal= 96.525÷144= 0.6703125 ft²

8 0
3 years ago
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