If 2x+z=2y and 2x+2y+z=20 what is the value of y?

Answers

Answer 1

Answer: $2x+z=2y\to2x=2y-z\n\nsubstitute\ to\ 2x+2y+z=20:\n\n(2y-z)+2y+z=20\n2y-z+2y+z=20\n4y=20\ \ \ \ /:4\ny=5\to answer$

Answer 2

Answer:

The value of y is 5

Given,

2x+z=2y

2x+2y+z=20

Now,

From equation substitute the value of 2x,

2x = 2y -z

substitute the value in second equation,

2y -z + 2y + z = 20

Now solve the terms with like variables,

4y = 20

y = 5

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please help me :Tom ate four more pieces of fruit than Janet. Sylvia ate twice as many pieces of fruit as Tom. If x represents the number of pieces of fruit that Janet ate, write an expression to represent the amount of fruit that Sylvia ate.

Answers

J=X
T= X+4
S= 2(X+4). So s is sylvia

Final answer:

If x represents the number of pieces of fruit Janet ate, then Sylvia ate 2 * (x+4) pieces of fruit based on the given question.

Explanation:

The question requires an algebraic expression to show how many pieces of fruit Sylvia ate. According to the question, Tom ate four more pieces of fruit than Janet. If x is the number of fruits Janet ate, then we can represent the number of fruits Tom ate as x + 4.

Next, the question states that Sylvia ate twice as many pieces of fruit as Tom. So, we can represent the number of pieces of fruit Sylvia ate as 2 * (x+4). Hence, this is the expression that represents the amount of fruit that Sylvia ate.

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Which equation matches the sentence?Column A Column B
1.
Three less than 9 times a number is 21.
2.
The sum of 3 times a number and 9 is 21.
3.
The difference of 9 times a number and 3 is 21.
4.
Nine less than 3 times a number is 21.
A.
3n + 9 = 21
B.
9n – 3 = 21
C.
3n – 9 = 21

Answers

Hello,

1: 9n-3=21 ==>B

2: 3n+9=21 ==>A

3: 9n-3=21 ==>B

4: 3n-9=21 ==>C

I wish to have understood all those sentences.

What is 1 tenth of 0.65??

Answers

0.065 thats the answer

Solve for u. -24 = u ÷ 6
U=

Answers

Answer: Um, the answer is U= –144.

Step-by-step explanation:

If x = -3, then x 2-7x + 10 equals

Answers

Answer: 40

Step-by-step explanation: x=−3

(−3)2−(7)(−3)+10

=40

A cell phone manufacturer chose 200 people at random and asked them whether they would purchase the newest model for $300. The manufacturer repeated this survey using the same method three more times.Do any of the surveys appear to be biased?

Would purchase new model for $300? Survey
1 2 3 4
Yes 127 131 128 133
No 73 69 72 66

A.
Yes, because the results from Survey 1 differ the most from the other surveys’ results.

B.
Yes, because the results from Survey 4 differ the most from the other surveys’ results.

C.
No, because the sampling methods are all different but have about the same results.

D.
No, because all four surveys have about the same number of people saying “yes” and about the same number of people saying “no.”

Answers

Yes, because the results from Survey 4 differ the most from the other surveys’ results.

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Solve for x: 2x + 4 ≤ 12