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zlopas [31]
3 years ago
11

I need help on 21 . Please

Mathematics
1 answer:
kupik [55]3 years ago
4 0

Answer:

Air travels 6,920 meters in 20 seconds.

Step-by-step explanation:

If in one second air travels 346 meters, and you want to find out how many meters air travels in 20 seconds, then just multiply 346 by 20.

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.<br><br> y = x2 + 3<br> y = x + 5
ddd [48]
I assume you mean x squared in the first equation

Because both are equal to y, they are equal to each other so x + 5 = x^2 +3
If we then move everything over to one side, we get x^2 - x - 2 = 0

Then factorise it to (x-2)(x+1) = 0
And solve both parts separately

x + 1 = 0
x = -1

x-2 = 0
x = 2

Sub both values into the simplest equation in this case y=x+5
to get y = 4 and y = 7
7 0
2 years ago
Brooke is reading a 379-page book. She has already read 54 pages, and she can read 28 pages in an hour. If h represents the numb
Dafna1 [17]

Answer:

28x + 54 = 379 is what I came up with, though it would help to see the choises you have to select from if there are any.

Step-by-step explanation:

28 = the pages she reads in 1 hours.

x = how many hours it would take to finish the book.

54 = the amount of pages she's already read.

379 = the full amount of pages she needs to read to finish the book.

3 0
3 years ago
Which of the following functions best describes this graph?
natita [175]
The answer is A sorry if I’m wrong
4 0
3 years ago
Find 5.7 - 7.1 . pls show work
MrRissso [65]

Answer:

-2.6

Step-by-step explanation:

Basically you just subtract 7.1 from 5.7 which will give you -2.6 I don't really know how to explain it much more

3 0
3 years ago
Read 2 more answers
The ratio in which girls and children are born is 2 to 5, and 35 are born. How many girls are born?​
Mamont248 [21]

Answer: It should be 14 girls

Step-by-step explanation:

35/5=7

2*7=14

4 0
3 years ago
Read 2 more answers
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