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2 years ago

-1/3(4+z)=-5/6 I need answer ASAP

Mathematics

2 answers:

lesya [120]2 years ago

4 0

Answer:

-2/3

Step-by-step explanation:

SOVA2 [1]2 years ago

3 0

Answer:

z = - 1.5

Step-by-step explanation:

Given equation:

-1/3(4 + z) = -5/6

Multiply both sides by - 3 and simplify;

(-3)(-1/3(4 + z)) = (-3) (-5/6)
4 + z = 5/2
4 + z = 2.5
z = 2.5 - 4
z = - 1.5

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Use each model to predict the life expectancy of residents of a country for which the average annual income is $80,000

Mandarinka [93]

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The life expectancies of the models are given as:

$y =69.9352 + 0.1530\times (income)$ --- model 1

$y =4.2436 + 0.0021\times (income)$ --- model 2

$y =4.1393 + 0.0603\times (income)$ --- model 3

Given that the average annual income is $80,000;

We simply substitute 80000 for income in the equations of the three models.

So, we have:

Model 1

$y =69.9352 + 0.1530\times (income)$

$y =69.9352 + 0.1530\times 80000$

$y =12309.9352$

Model 2

$y =4.2436 + 0.0021\times (income)$

$y =4.2436 + 0.0021\times 80000$

$y =172.2436$

Model 3

$y =4.1393 + 0.0603\times (income)$

$y =4.1393 + 0.0603\times 80000$

$y =4828.1393$

Hence, the life expectancies are 12309.9352, 172.2436 and 4828.1393