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Alona [7]
4 years ago
9

28. A speed of a boat in still water is 11 km/hr. It can go 12 km upstream and return downstream to

Mathematics
2 answers:
AleksAgata [21]4 years ago
7 0

Answer:

5 km

Step-by-step explanation:

mel-nik [20]4 years ago
3 0

Answer:

Step-by-step explanation:

19?

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Need help understanding what to do
Juliette [100K]
I believe you are expected to simplify. To do this all you do is group like terms (x, x², x³ etc.) and then simplify the coefficients. 

13. 10z + 7z - 19z² - 5z² - 17z 

first you can rearrange and group like terms (remember the bring the sign in front of each term with it). I would do it like this: 
-19z² - 5z² +10z + 7z - 17z

Now simplify the coefficients: 

-24z² + 0z 

you can omit the 0z and your simplified answer is 

-24z²

Main thing to remember here is that z and z² cannot be simplified together, nor can any variable that has an exponent because the exponent makes them differ. 

6 0
3 years ago
88.83 is what percent of 21?
ozzi
423%. Calculate this with \frac{88.83}{21}
5 0
4 years ago
Read 2 more answers
Help with this one? Please
netineya [11]

Answer:

x = 40

Step-by-step explanation:

The figure shows two similar triangles. Thus, the side lengths of similar triangles are proportional to each other. Therefore:

\frac{24}{24 - 15} = \frac{x}{x - 25}

\frac{24}{9} = \frac{x}{x - 25}

Cross multiply

24(x - 25) = 9(x)

24x - 600 = 9x

Subtract 24x from each side

- 600 = 9x - 24x

- 600 = -15x

Divide both sides by -15

40 = x

x = 40

3 0
3 years ago
True or False? I need help asap please
salantis [7]

Answer:

True

Step-by-step explanation:

Angles 1 and 5 match each other; they are congruent and in the same positions. There are therefore corresponding.

8 0
3 years ago
Read 2 more answers
What is the sum of two odd numbers of 36
irakobra [83]
The sum of two odd numbers is 23+13. One way you could figure it out is to use your logic thinking! Hope this helps and I hope that you get this answer before the moderater deletes it! (They hate me! ☹️ I don't know what I ever done to them I just started today)
4 0
3 years ago
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