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guajiro [1.7K]
3 years ago
5

4x-3y=17 Y=3x-4 Solve by subsition

Mathematics
1 answer:
Fudgin [204]3 years ago
8 0
4x - 3y = 17
y = 3x - 4
(-1, -7)
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A solution of salt and water is 20% salt. If 25% of the water is removed, what is the percentage of salt in the new solution?
Ratling [72]
So lets say that this salt and water solution consists of 100 liters.

Then that means 20 liters is salt, and 80 liters out of the 100 is water.



Now, we remove 25% of the water. 25% of 80 liters is 20 liters. So, we are left with 80-20, or 60 liters.



Now in all we have 20 liters of salt, and 60 liters of water.

The percentage of salt in the new mixture will be 20/(20+60) = 20/80 = 25%.



Your answer is 25%
4 0
3 years ago
I've ordered this shed. It is 2 meters wide, 3.25 meters long and 2 meters tall to the roof line. From the roof line to the peak
Alecsey [184]

Answer:

18.2 cubic meters.

Step-by-step explanation:

From the measurements they give us, we assume that the shed has the shape of a rectangular prism, however, to calculate the amount of storage, we must calculate the volume.

The volume would be:

V = height * width * length

According to the statement height = 2, width = 2 and length = 3.25

V = 2 * 2 * 3.25

V = 13

That is, the volume of the shed is 13 cubic meters, but then they mention that the roof line to the peak is 0.8 meters high, which means that the volume can increase, the new volume would be changing the height = 2 + 0.8 = 2.8, the other values remain the same:

V = 2.8 * 2 * 3.25

V = 18.2

That is to say that when adding that part, the volume that is to say total amount of storage is 18.2 cubic meters.

6 0
3 years ago
Find the first term of a sequence x+1,2x-18,2x-1,if this sequence is an arithmetic progression​
PIT_PIT [208]

Answer:

a₁ = 37

Step-by-step explanation:

In an arithmetic progression the common difference d is

d = a₂ - a₁ = a₃ - a₂ , that is

2x - 18 - (x + 1) = 2x - 1 - (2x - 18) ← distribute and simplify both sides

2x - 18 - x - 1 = 2x - 1 - 2x + 18

x - 19 = 17 ( add 19 to both sides )

x = 36

Thus

a₁ = x + 1 = 36 + 1 = 37

6 0
3 years ago
Macky wants to open a checking account. He is examining different banks and banking accounts. Then he will choose a bank account
Alex
I think the answer would be c. I mean, I know I wouldn't choose a bank 'cause it offered a prize. Hope this helps! 
4 0
3 years ago
Read 2 more answers
Last one please help meeeee
sergey [27]

Answer: Answer :Isolate the variable by dividing each side by factors that don't contain the variable.

Exact Form:

x

=

3

√

9

45

x

=

9

3

45

Decimal Form:

x

=

0.04622408

…

x

=

0.04622408

I hope this helps friend

Step-by-step explanation:

6 0
3 years ago
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