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Pani-rosa [81]
3 years ago
9

Write and solve the following expression:The sum of 7 and twice a number is 15

Mathematics
1 answer:
Nastasia [14]3 years ago
8 0

Answer:

It would be 7 + 2x = 15

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The side length of a square can be represented by the expression 2x − 5. Write a polynomial that represents the area of the squa
Helen [10]

Answer:

Step-by-step explanation:

area of square A=(2x-5)²

5 0
4 years ago
4x- 2y = 8<br> 2x + y =2
Juli2301 [7.4K]

Answer:

x = 3/2 , y = -1

Step-by-step explanation:

I'm assuming that you are being asked to solve the system of equations for x and y.

given:

4x- 2y = 8  ---------------(1)

2x + y =2 -----------------(2)

We can solve this by elimination:

multiple (2) by 2, we get:

2(2x + y) =2(2)

4x + 2y = 4 ------------(3)

(1) + (3) , we get:

(4x- 2y) - (4x + 2y) = 8 + 4

8x = 12   (divide both sides by 8)

x = 12/8

x = 3/2   answer, substitute this into (2)  

2(3/2) + y =2

3 + y = 2  (subtract 3 from both sides)

y = 2 - 3

y = -1  answer

5 0
3 years ago
Explain how you can divide 6/8 by 0.25. Show the steps to your answer and reply to at least two other responses.
blondinia [14]

Answer:

The result is 3.

Step-by-step explanation:

One way is to convert the 0.25 to a fraction.

Thus 0.25 = 25/100 = 1/4.

Note 6/8 simplifies to 3/4, so we have the division:-

3/4  /  1/4

We invert the 1/4 and multiply:-

= 3/4 * 4/1

= 12/4

= 3 (answer).

4 0
3 years ago
A pharmaceutical company receives large shipments of aspirin tablets. The acceptance sampling plan is to randomly select and tes
Pavel [41]

Answer:

0.818

Step-by-step explanation:

Since the shipment has a ton of aspirin tablets, we can assume that we pick 13 of them <em>with</em> <em>reposition, </em>because the probability shoudn't change dramatically from the probability of picking without reposition if we do so.

We call D the amount of defective tablets. If we assume that we pick the tablets with reposition, then we obtain that D is a random variable of Binomial distribution with parameters 13 and 0.6 (the probability of picking a defective tablet).

We want D to be at most one. To calculate the probability of that event we add up the probability of D being equal to 0 and the probability of D being equal to one. Since D is binomial, we have

  • P(D = 0) = (1-0.06)^{13} = 0.447
  • P(D = 1) = {13 \choose 1} * 0.06^1 * (1-0.06)^{12} = 13*0.06*0.94^{12} = 0.371

We conclude that

P(D \leq 1) = P(D = 0) + P(D = 1) = 0.447+0.371 = 0.818

Hence, the shipment will be accepted with probability 0.818

<em>I hope this helps you!</em>

6 0
3 years ago
A rational number can be written as the ratio of on BLANK to another.
swat32
"Integer" I think! As all rational numbers can be written as integer fractions.
4 0
4 years ago
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