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slava [35]
3 years ago
12

4a2 – 21a + 20 4a 5 a 4a2 5a 4 16a 20 80a2 (4a + 5)(a + 4)

Mathematics
1 answer:
melomori [17]3 years ago
3 0

Answer:

5 a

Step-by-step explanation:

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Jane drives at a constant rate of 45 miles per hour for 4 hours. How far will she have traveled in that time?
bearhunter [10]
180 miles per hour. 45*4 to get the answer.<span />
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3 years ago
Each course at a community college is worth 1 or 2 credits. A group of students is taking a total of 16 courses that are worth a
Anuta_ua [19.1K]

Answer:

They  are taking 12 2 credit courses

The are taking 4  1 credit courses

Step-by-step explanation:

x = 1 credit courses

y = 2 credit courses

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x+y = 16

The number of credits is 28 so multiply the course by the number of credits

1x+2y=28

Subtract the first equation from the second equation

x+2y =28

-x-y=-16

-----------------

y = 12

They  are taking 12 2 credit courses

We still need to find the 1 credit courses

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x+12= 16

Subtract 12 from each side

x-12-12 = 16-12

x =4

The are taking 4  1 credit courses

6 0
3 years ago
Simplify negative 8 over 3 divided by negative 2 over 6
Art [367]

Answer: The answer is 8

5 0
3 years ago
Find the slope for the points (5,7) and (8,4)
raketka [301]

Answer:

-1

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(4-7)/(8-5)

m=-3/3

m=-1

4 0
3 years ago
Read 2 more answers
Explain how to model the division of -20 by -5 on a number line.
Elina [12.6K]
So you label -20 on the number line. Then you split it into -5 and count much space is in between the <em>'split'.</em>
4 0
3 years ago
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