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2 years ago

Write an expression that represents the statement "add 9 and 3, then multiply by 6."

2 answers:

5 0

The answer is (9+3)6

There are two ways to solve:
1. Using the Distributive Property
(9 + 3) 6
=(54 + 18)
=72

2. Adding what is in the parentheses first
(9 + 3) 6
=(12) 6
=72

podryga [215]2 years ago

4 0

An expression for "add 9 and 3, then multiply by 6" is easy
(9+3) 6
12•6

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The sum of two numbers is 22. The difference is 6. What are the two numbers?

algol [13]

Answer:

Numbers are 14 and 8

Step-by-step explanation:

Let the 2 numbers be x and y.

Write 2 equations:

x + y = 22

x - y = 6

Solve by substitution:

x - y = 6

x = y + 6

Plug into the other equation:

(y + 6) + y = 22

2y + 6 = 22

2y = 16

y = 8

Plug into either equation:

x + 8 = 22

x = 14

Numbers are 14 and 8

7 0

3 years ago

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ella [17]

Step-by-step explanation:

$x + ( - 15) = 9$

$x - 15 = 9$

$x = 9 + 15$

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3 years ago

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erastovalidia [21]

Answer:

Step-by-step explanation:

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3 years ago

A survey study is to be made to estimate the proportion of residents of a certain suburb who favor the construction of a public

lesya [120]

Answer: 601

Step-by-step explanation:

When the prior estimate of population proportion is not given , the formula we apply to find sample size :

$n=0.25(\dfrac{z^*}{E})^2$

, where z* = critical z-value

E=Margin of error

Given : Margin of error = 0.04

Confidence level = 95%

We know that , according to the z-table , the critical value for 95% confidence interval = z*= 1.960

Then, the required sample size : $n=0.25(\dfrac{1.960}{0.04})^2$

$n=0.25(49)^2$

$n=0.25(2401)=600.25\approx601$

Hence, the required minimum sample size = 601

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3 years ago

Find the (a) mean, (b) median, (c) mode, and (d) midrange for the given sample data.

professor190 [17]

Answer:

Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the (a) mean, (b) median, (c) mode, and (d) midrange for the given sample data in millions of dollars. Given that these are the top 10 salaries, do we know anything about the salaries of TV personalities in general? Are such top 10 lists valuable for gaining insight into the larger population?

38.438.4 35.335.3 35.935.9 26.126.1 15.115.1 13.313.3 11.211.2 10.710.7 9.59.5 8.28.2

Step-by-step explanation:

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3 years ago