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3 years ago

How do you solve -3y-8=25

1 answer:

7 0

You'll want y to become separate, so you'll begin by adding 8 to -8 and you'll also add 8 to 25, this becomes -3y=33, then since y needs to be alone, divide both sides of the equation with a factor. this factor will be -3, so y=-11.

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What is the domain of the function?<br> O x>-2<br> O x > 0<br> O x < 2<br> all real numbers

atroni [7]

Answer: x > -2, which is choice A

Notice that there's a vertical asymptote at x = -2. Think of it like an electric fence. You can get closer to it, but you can't touch it.

The domain is the set of all allowed inputs of a function.

7 0

3 years ago

Juan lives 100 m away from bill. what is juans average speed if he reaches bill in 50 seconds

Lynna [10]

50 because half of 100 is 50 and bill reaches Juan in 50 it men’s that Juan reaches bill in50 toooooo

6 0

3 years ago

Which segment does NOT intersect line AG? Please help.

Lina20 [59]

Answer:

line BC

Step-by-step explanation:

Line BC is the only line that doesn’t touch line AG

4 0

2 years ago

The USDA conducted tests for salmonella in produce grown in California. In an independent sample of 252 cultures obtained from w

Marat540 [252]

Answer:

The decision rule is

Fail to reject the null hypothesis

The conclusion is

There no sufficient evidence to show that the proportion of salmonella in the region’s water differs from the proportion of salmonella in the region’s wildlife

Step-by-step explanation:

From the question we are told that

The first sample size is $n_1 = 252$

The number that tested positive is $k_1 = 18$

The second sample size is $n_2 = 476$

The number that tested positive is $k_2 = 20$

The level of significance is $\alpha = 0.01$

Generally the first sample proportion is mathematically represented as

$\^ p _1 = \frac{k_1 }{ n_1 }$

=> $\^ p _1 = \frac{18 }{ 252 }$

=> $\^ p _1 = 0.071$

Generally the second sample proportion is mathematically represented as

$\^ p _2 = \frac{k_2 }{ n_2 }$

=> $\^ p _2 = \frac{20 }{ 476}$

=> $\^ p _2 = 0.042$

The null hypothesis is $H_o : p_1 - p_2 = 0$

The alternative hypothesis is $H_a : p_1 - p_2 \ne 0$

Generally the test statistics is mathematically represented

$z = \frac{ \^ p_1 - \^ p_2 - ( p_ 1 - p_2 )}{ \sqrt{\frac{\^ p_1 (1-\^ p_1)}{ n_1 } + \frac{\^ p_2 (1-\^ p_2)}{ n_2 } } }$

=> $z = \frac{ 0.071 - 0.042 - 0 }{ \sqrt{\frac{0.071 (1-0.071)}{ 252 } + \frac{0.042 (1-\^ 0.042)}{ 476 } } }$

=> $z = 1.56$

From the z table the area under the normal curve to the right corresponding to 1.56 is

$P(Z > 1.56 ) =0.05938$

Generally the p-value is mathematically represented as

$p-value = 2 * P(Z > 1.56 )$

=> $p-value = 2 * 0.05938$

=> $p-value = 0.1188$

From the value obtained we see that $p-value > \alpha$ hence

The decision rule is

Fail to reject the null hypothesis

The conclusion is

There no sufficient evidence to show that the proportion of salmonella in the region’s water differs from the proportion of salmonella in the region’s wildlife

5 0

3 years ago

Jenna flips to pennies 105 times how many times can she expect both coins to come up heads

seropon [69]

53 because there is only 2 sides of a penny so 105 divided by 2 is 52.5

8 0

3 years ago

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