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Anni [7]
3 years ago
15

Write an equivalent expression for 9 y + 2 y + 5 -2

Mathematics
1 answer:
IRISSAK [1]3 years ago
7 0

Answer:

An equivalent expression would be:

11y + 3

You would combine like terms, so 9y + 2y = 11 y and +5 - 2 = +3.

The simplest equivalent expression you would be able to have then is 11y + 3

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Question 13 pts
oee [108]

Answer:

1. 68%

2. 50%

3. 15/100

Step-by-step explanation:

Here, we want to use the empirical rule

1. % waiting between 15 and 25 minutes

From what we have in the question;

15 is 1 SD below the mean

25 is 1 SD above the mean

So practically, we want to calculate the percentage between;

1 SD below and above the mean

According to the empirical rule;

1 SD above the mean we have 34%

1 SD below, we have 34%

So between 1 SD below and above, we have

34 + 34 = 68%

2. Percentage above the mean

Mathematically, the percentage above the mean according to the empirical rule for the normal distribution is 50%

3. Probability that someone waits less than 5 minutes

Less than 5 minutes is 3 SD below the mean

That is 0.15% according to the empirical rule and the probability is 15/100

7 0
2 years ago
There are 250 bricks used to build a wall 20 feet high.How many bricks will be used to buld a wall that is 30 fet high
Dmitry_Shevchenko [17]

Answer: 375

Step-by-step explanation:

Since we are given the information that there are 250 bricks used to build a wall 20 feet high, the number of brick used per feet will be:

= 250/20

= 12.5 bricks per feet.

Therefore, the number of bricks that will be used to buld a wall that is 30 fet high will be:

= 12.5 × 30

= 375 bricks.

Therefore, 375 bricks would be used.

3 0
3 years ago
Simplify the polynomial. Then find its value for the given value of the variable.
zloy xaker [14]

Answer:

  • simplified: xy²
  • value: 4

Step-by-step explanation:

The polynomial is simplified by combining like terms. Like terms are identified more easily if the variables in each term are written in the same order. We usually like to use alphabetical order. Two of the like terms have opposite coefficients, so they cancel. The result is ...

  (3 1/2 -2 1/2)xy² +(-2 4/5 +2 4/5)x²y

  = xy² . . . . simplified expression

__

For x = 1, y = -2, the value of the expression is ...

  (1)(-2)² = 4

4 0
2 years ago
What is the area of this face?<br>4<br>in.<br>4<br>in.<br>in<br>4<br>in.​
bagirrra123 [75]

Answer:

64 inches

Step-by-step explanation:

4 0
3 years ago
During vacation, Dave and his brother, Scott, rode their bikes from their family's rental house to a pond to go fishing. Althoug
padilas [110]

Answer:Dave

Step-by-step explanation:

If we are thinking logically, since dave arrived at the pond first even though they left at the same time, he should go farther because he is more athletic based on the information.

8 0
3 years ago
Read 2 more answers
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