Please help quick.

Readme [11.4K]

A) 3x+4y=17
B) -4x-3y=-18 Multiplying B) by .75
B) -3x -2.25y= -13.5 then adding this to A
A) 3x + 4y = 17
1.75y = 3.5
y = 2

A) 3x + 4*2 = 17
3x + 8 = 17
3x = 9
x = 3

(3,2)

5 0

4 years ago

2.6 1.8 4.2 3.3 how do i estimate these decimals

Masja [62]

Hello!

If the digit to the right is less than 5, you drop it to the left one. If the digit is greater than 5, then you round it to the next decimal. So, here are the answers:

2.6 rounded = 3

1.8 rounded = 2

4.2 rounded = 4

3.3 rounded = 3

I hope you found this useful! c:

6 0

3 years ago

Bob’s family drinks 122 pints of sweet tea in a month how many gallons does he drink in one month

geniusboy [140]

Answer:

15.25 gallons

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

The train travels 31.2 miles in 52 minutes, how many miles will it travel in 60 minutes?

adell [148]

$\frac{31.2miles}{y52minutes}= \frac{x}{60minutes} 1872=52x
 x=36 miles

$

7 0

3 years ago

Suppose a computer programmer in each of the five countries listed is offered a salary of $1,500 per month. Using the z scores a

IRINA_888 [86]

The question is incomplete! Complete question along with answer and step by step explanation is provided below.

Question:

Suppose an industrial/organizational psychologist is interested in the relationships between job satisfaction, job performance, and job compensation. She has data from five different countries on the average monthly salaries paid to computer programmers. She begins her analysis by converting all of the salary data into U.S. dollars:

Country Average monthly salary Standard deviation Original currency

the Czech Republic $1,059 $158.80 koruna

Latvia $790 $118.60 lat

Korea $2,245 $673.60 won

Romania $646 $96.80 leu

the United States $4,141 $1,242.20 dollar

Suppose a computer programmer in each of the five countries listed is offered a salary of $1,500 per month. Using the z scores and assuming that the computer programmer prefers a salary that has a higher relative value, the computer programmer from ______(what country) will likely be the most pleased with the offer, because a salary of $1,500 per month for this country corresponds to the_____.

a) highest z score

b) lowest z score

c) z score closest to zero

Answer:

a) highest z score

Therefore, using the z scores and assuming that the computer programmer prefers a salary that has a higher relative value, the computer programmer from Romania will likely be the most pleased with the offer, because a salary of $1,500 per month for this country corresponds to the highest z score .

Step-by-step explanation:

Let us calculate z-score corresponding to each country.

The z-score is given by

$z = \frac{x-\mu}{\sigma } }$

Czech Republic:

μ = $1,059

σ = $158.80

$z = \frac{1500-1059}{158.80 } } \\\\z = 2.77$

Latvia:

μ = $790

σ = $118.60

$z = \frac{1500-790}{118.60 } } \\\\z = 5.98$

Korea:

μ = $2,245

σ = $673.60

$z = \frac{1500-2245}{673.60 } } \\\\z = -1.10$

Romania:

μ = $646

σ = $96.80

$z = \frac{1500-646}{96.80 } } \\\\z = 8.82$

United States:

μ = $4,141

σ = $1,242.20

$z = \frac{1500-4141}{1242.20 } } \\\\z = -2.12$

Country z-score

Czech Republic 2.77

Latvia 5.98

Korea -1.10

Romania 8.82

The United States -2.12

Therefore, using the z scores and assuming that the computer programmer prefers a salary that has a higher relative value, the computer programmer from Romania will likely be the most pleased with the offer, because a salary of $1,500 per month for this country corresponds to the highest z score .

6 0

3 years ago