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Oksanka [162]
3 years ago
13

3(2x - 3)- 9x - 4 = 2x + 12

Mathematics
1 answer:
user100 [1]3 years ago
7 0

Answer: 6x-9-9x-4=2x+12

6x-9x-9-4-2x-12=0

-5x-25=0

-5x=25

X=-5

Step-by-step explanation:

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An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California. Suppose that
sergiy2304 [10]

Answer:

(22.0297, 23.3703)

Step-by-step explanation:

Given that an economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California.

Let X be per capita income (in thousands of dollars) for a major city in California.

Mean = 22.7

n = 183

Population std dev = 6.3

Since population std dev is known we can use Z critical value.

Std error = \frac{6.3}{\sqrt{183} } \\=0.4657

Z critical =1.44

Marginof error = ±1.44*0.4657=0.6706

Confidence interval 85%

=(22.7-0.6703, 22.7+0.6703)\\= (22.0297, 23.3703)

7 0
2 years ago
A and B together complete a work in 20days. They worked together for 5days and B leaves. How long will A takes to finish the rem
andreev551 [17]

Answer:

27 days

Step-by-step explanation:

A alone, rate per day = 1/36

A and B together, rate per day = 1 / 20

Total Workdone for 5 days :

1/ 20 * 5 = 5 / 20 = 1/4

Fraction of work left :

1 - 1/4 = 3/4

3 / 4 * 36 /1

= (3 * 36) / 4

= 108 / 4

= 27 days

3 0
2 years ago
Please help with this Piecewise problem!!
tino4ka555 [31]

Remark

That was well worth doing. Desmos gave you the answer to the graph. Unfortunately I can only give you the correct graph. You will have to figure out from the choices which one is the correct answer -- or edit it so I can see what the rest of the question is.

Graph

The red one is f(x) is x + 3 {x <= -2}

The blue one is f(x) is x^2 - 1 {-2 <x <1} Notice the gap at 2. It is not continuous

The green one is f(x) is log_2(-x + 3)  {1 <=x < 3} and there is a gap between the blue and green one.

4 0
2 years ago
Cual es la respuesta de 5762÷34​
juin [17]

is is 169.47058823 yes this the anser

7 0
3 years ago
There are two numbers 235,082 miles and 363,104 kilometers. What is the scientific notion?
Lynna [10]

Answer:

Miles=2.35082e5 Kilometers= 3.63104e5

Step-by-step explanation:

8 0
2 years ago
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