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charle [14.2K]
3 years ago
15

What is 340 pages; 20 percent decrease

Mathematics
1 answer:
tresset_1 [31]3 years ago
8 0
The answer would be 272 because youre trying to find the decrease which is 
340x.20 because you always move the percent over two decimals. you would get 68 after multiplying it then u would subtract that number by 340.
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Which values for A and B will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b
Nata [24]

Answer:

a = -2 , b = -8

Step-by-step explanation:

* Lets talk about the solution of the linear equations

- There are three types of the solutions of the system of linear equations

# If the two lines intersect each other, then there is one solution

- The equations are ax+ by = c , dx + ey = f

# If the two lines parallel to each other, then there is no solution

- The equations are ax+ by = c , ax + by = d in its simplest form ,

  where a is the coefficient of x , b is the coefficient of y and

  c , d are the numerical terms

# If the two lines coincide (over each other), then there are infinite

   solutions

- The equations are ax+ by = c , ax + by = c in its simplest form, where

  a is the coefficient of x , b is the coefficient of y and c is the

  numerical term

* Lets solve the problem

∵ The system of equation is:

   ax - y = 8 ⇒ (1)

   2x + y = b ⇒ (2)

∵ The system create infinitely many solutions

∴ The lines are coincide

- The equations must be equal, then multiply equation(1) or (2) by -1 to

  make the coefficient of y in the two equations equal

∴ -ax + y = -8

∴ 2x + y = b

∵ Their coefficients of x are equal

∵ Their coefficients of y are equal

∵ Their numerical terms are equal

∵ The coefficient of x in equation (1) is -a and in equation (2) is 2

∴ -a = 2 ⇒ multiply both sides by -1

∴ a = 2

∵ The numerical term in equation (1) is -8 and in equation (2) is b

∴ b = -8

* The values for a and b will create infinitely many solutions are -2 , -8

5 0
3 years ago
A carpenter has a piece of wood that is 78 inches long. He wants to cut it so that one piece is five times as long as the other
Lyrx [107]

Answer:

13 and 65

Step-by-step explanation:

x + 5x = 78

(because u want a piece (x) and a piece that's five times longer than x- so 5x. and they should come from a 78 inch piece)

6x = 78

x = 78 / 6

x= 13

(to counter check:  13 * 5 = 65.  

                               65 + 13 = 78  )

7 0
3 years ago
Read 2 more answers
455 is divisible by 10. True or false
Yuliya22 [10]

Answer:

true and the answer would be 45.5

Step-by-step explanation:

7 0
3 years ago
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Write the phrase as an expression. The quotient of 40 and the difference of a number y and 16.
klio [65]

Answer:

40/y-16

Step-by-step explanation:

5 0
3 years ago
Fill in the blank to complete the equation below.<br> 33 +?= 3(11 + 8)
svetlana [45]

Answer:

24

Step-by-step explanation:

11+8=19

19×3=57

33-54=24

3 0
2 years ago
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