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3 years ago

Need help with 19 to 21 please help

Mathematics

1 answer:

Vinvika [58]3 years ago

3 0

Answer:

19. It only makes sense if cumm

20. Its a little harder to do this one, because cumm

21. cumm

Step-by-step explanation:

cumm

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MrRa [10]

For this case we have the following expression:

$(xy-3y ^ 2 + 5xy ^ 2) - (- xy + 3xy ^ 2-3y ^ 2) =$

We apply distributive property considering that:

$- * + = -\\- * - = +$

Rewriting the expression we have:

$(xy-3y ^ 2 + 5xy ^ 2) + xy-3xy ^ 2 + 3y ^ 2 =\\xy-3y ^ 2 + 5xy ^ 2 + xy-3xy ^ 2 + 3y ^ 2 =$

We add similar terms taking into account that:

Equal signs are added and the same sign is placed.

Different signs are subtracted and the major sign is placed.

$xy + xy-3y ^ 2 + 3y ^ 2 + 5xy ^ 2-3xy ^ 2 =\\2xy + 2xy ^ 2$

Answer:

$2xy + 2xy ^ 2$

8 0

3 years ago

Why is angel 6 congruent to angel 2

abruzzese [7]

Step-by-step explanation:

Angle 6 is only equal to angle 2 if the lines are parallel. The horizontal line is being intersected by two lines, if they are parallel then <6 = <2. They are equal because the horizontal line is straight, meaning anything crossing it that are parallel wil creat equal angles

8 0

3 years ago

Plz help i will report if your not trying to answer

skelet666 [1.2K]

1) 1 x 10^4
2) 1 x 10^0

5 0

3 years ago

in 1999 there were 69063 physicians specializing in family practice in the united states and its possessions the number of male

Alecsey [184]

Answer:

18,887

Step-by-step explanation:

7 0

3 years ago

James decides to walk from school to the park tp play ball. The park is only 0.5 mile from the school. He leaves school at 3:15

aleksley [76]

Answer: $0.05\ \frac{mi}{min}$

Step-by-step explanation:

For this exercise you need to remember the following formula:

$V=\frac{d}{t}$

Where "V" is the speed, "d" is the distance and "t" is time.

In this case, according to the information given in the exercise, you know that:

- James leaves his school at 3:15 and arrives at the park at 3:25. Then, you can identify that the time it takes him to go from his school to the park is:

$t=10\ min$

- The park is 0.5 miles from James' school. Therefore, you can identify that "d" is:

$d=0.5\ mi$

So, knowing those values, you can substitute them into the formula:

$V=\frac{0.5\ mi}{10\ min}$

Finally, evaluating, you get the following result:

$V=0.05\ \frac{mi}{min}$

6 0

3 years ago