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Charra [1.4K]
3 years ago
5

What is the equivalent expression for 2x-3

Mathematics
2 answers:
jeyben [28]3 years ago
7 0

Answer: The answer is -6

Step-by-step explanation:

I had this on my math quiz (online schooling) and got it right

OLEGan [10]3 years ago
5 0

Answer: 2x-3

Step-by-step explanation:

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A chemist has a 40% alcohol solution and a 25% alcohol solution. How much of each should he mix together to get 50 liters of a 3
ludmilkaskok [199]

Answer:

33 1/3 L of the 40% solution, 16 2/3 L of the 25% solution

Step-by-step explanation:

Set up two equations...

Let x represent the number of Liters of the 40% solution

Let y represent the number of Liters of the 25% solution

We need 50 liters total, so

x + y = 50

and we need the 50 L to be 35% solution, so

0.4x = 0.25y =  0.35(50)  

Solve the first equation for one variable...

x = 50 - y             (subtract y from both sides in equation 1)

Now substitute that value into the second equation...

0.4(50 - y) + 0.25y = 17.5      (x becomes 50 - y, 0.35(50) = 17.5)

Now solve for y...

20 - 0.4y + 0.25y = 17.5

  -0.15y = -2.5

      y = 16.66666667

        y = 16 2/3 L

So we need to plug that into the first equation to find 'x'

x + 16 2/3 = 50

x = 50 - 16 2/3

x = 33 1/3

3 0
3 years ago
Read 2 more answers
Pls help A bag contains 40 colored tiles. There are 12 red, 17 blue, 8 yellow and 3 green. One tile is drawn at
aleksley [76]
D blue I think, it has the most tiles in the bag 17/40 while all the other fractions are smaller decreasing their chances
4 0
3 years ago
For a science project 30 students are divided into a group of six each group needs a piece of string that is 2 1/2 feet long mr.
Anuta_ua [19.1K]

Answer:

66 inches

Step-by-step explanation:

1. Yards to Feet:

1 yard= 3 feet

(6 yards)(3)= 18

6 yards = 18 feet

2. Number of Groups:

30 students/6 students per group= 5 groups

3. Total String Needed:

(5 groups)x(2.5 feet string)= 12.5 feet total string

4. Remaining String:

18 feet-12.5 feet= 5.5 feet

5. Feet to Inches:

1 foot= 12 inches

(5.5 feet)(12)= 66 inches

66 inches of string will remain

3 0
3 years ago
Todd has already baked 26 pies,and he can bake 2pies with each additional cup of sugar he buys.How many additional cups of sugar
kozerog [31]

Answer:

11 cups

Step-by-step explanation:

Since he has already baked 26.

-The additional number of cakes to be baked is

=48-26=22 cakes

Each cup of sugar bakes 2 then for 22 it means he needs 22/2=11 cups of sugar

8 0
3 years ago
Consider the following system of equations.
Sidana [21]
Y = 6x - 6  therefore   y - 6x = -6
y - 6x = 5 
so:
-6 ≠ 5
There is no solution to this system.
==========================
\left \{ {{y=6x-6} \atop {y-6x=5}} \right.  \\  \left \{ {{6x-y=6} \atop {-6x+y=5 }} \right.  \\ 0 \neq 11
6 0
3 years ago
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