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3 years ago

Pleaseee help me with this .

Mathematics

2 answers:

USPshnik [31]3 years ago

6 0

Its negative 8 positive 1 (-8,1)

enyata [817]3 years ago

4 0

Answer:

(-8,1)

Step-by-step explanation:

You can substitute one equation into the other to work this out.

Since y=2x+17, we can replace y in the first equation with 2x+17, giving a result of -x+2x+17=9.

From there, you can combine the x (-1x+2x=1x) to get x+17=9.

Subtracting 7 from both sides isolates x, leaving x=-8.

We can use the x value to work out the y by substituting it into either equation (I'm going to use the second one).

This gives y=2×-8+17, which can be solved to y=-16+17, and further to y=1.

This makes the point of intersection (-8,1), as those are the shared values.

**This involves simultaneous equations, which you may wish to revise. I'm always happy to help!

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In the Health ABC Study, 543 subjects owned a pet and 1977 subjects did not. Among the pet owners, there were 293 women; 975 of

True [87]

Answer:

The proportion of pet owners who were women is 0.540.

The proportion of non-pet owners who were women is 0.493.

Step-by-step explanation:

The data provided is summarized in the table below.

Pet Owners Non-Pet Owners TOTAL

Men 250 1002 1252

Women 293 975 1268

TOTAL 543 1977 2520

Denote the events as follows:

W = a subject is a women

P = a subject is a pet owner

The probability of an event, say E, is defined as the ration of the favorable outcomes of E to the the total number of outcomes of the experiment.

P (E) = n (E) ÷ N

Here,

n (E) = favorable outcome

N = total number of outcomes

(1)

The conditional probability of an event B given that another events A has already occurred is:

P (B | A) = n (A ∩ B) ÷ n (A)

Compute the probability of a pet owner being a women as follows:

P (W | P) = n (W ∩ P) ÷ n (P)

= 975 ÷ 1977

= 0.5396

≈ 0.540

Thus, the proportion of pet owners who were women is 0.540.

(2)

Compute the probability of a non-pet owner being a women as follows:

P (W | P') = n (W ∩ P') ÷ n (P')

= 293 ÷ 543

= 0.4932

≈ 0.493

Thus, the proportion of non-pet owners who were women is 0.493.

8 0

3 years ago

Quadratic Data

EastWind [94]

I think it’s quadratic

7 0

3 years ago

QUICK WHATS THIS ANSWER?!?

Mars2501 [29]

Answer:

C. $-x-6>-3.5$

Step-by-step explanation:

One is asked to find which inequality has ( $x=-3$ ) in its solution set. Remember that an inequality is another way to represent a set of solutions. In essence, it states that all numbers less than; less than or equal to; greater than; or greater than or equal to, are a part of the solution. One simplifies an inequality in a similar manner to how one simplifies an equation, by using inverse operations and simplification. Just note that when multiplying or dividing the inequality by a negative number, one has to flip the inequality sign to ensure the expression remains true.

Simplify each of the inequalities, then evaluate to see which one has ( $x=-3$ ) as a part of its solution set.

A. $-x -6$

$-x$

$x>-2.5$

B. $-x-6>3.5$

$-x>9.5$

$x$

C. $-x-6>-3.5$

$-x>2.5$

$x$

D. $x-6>-3.5$

$x>2.5$

As can be seen, option (C $-x-6>-3.5$ ) is the only one that fits this requirement. Since option (C) simplifies down to ( $x$ ) or in words, (x) is less than (-2.5). This option is the only one that fits the solution since (-3) is less than (-2.5).

7 0

3 years ago

How many solutions does the equation 5x-8=3x+8

posledela

Answer:

One solution

Step-by-step explanation:

5x-8 = 3x+8

2x = 16

x = 8 = true once

5 0

3 years ago

Read 2 more answers

Can x = 0 in the equation below? Explain. 4 + x + 2 > 8

solong [7]

Answer:

No, x can't equal zero.

Step-by-step explanation:

substitute x for zero. now the equation says 4+0+2>8

4+2 is 6 so 6 < 8. 6 is less than 8 not greater, therefore x can't be zero

7 0

4 years ago

Read 2 more answers