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garri49 [273]
3 years ago
11

How many questions do you need to get wrong on a 25 question test to score 80%?

Mathematics
1 answer:
Andreyy893 years ago
6 0
25 times 0.8 = 20. 25-20=5

5 questions
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Simplify 5 radical -24
Aleks [24]

Answer:

= 10root6 i

Step-by-step explanation:

= 5 • 2root6 i

= 10root6 i

6 0
3 years ago
A plane begins to descend from a height of 202 meters. The plane decreases in altitude at an average rate of 1.8 meters per seco
stepladder [879]
The plane starts at 202 m.
All altitudes are in meters.
After 1 second, it is at 202 - 1.8
After 2 seconds, it is at 202 - 1.8 * 2
After 3 seconds, it is at 202 - 1.8 * 3
etc.
After x seconds, it is at 202 - 1.8 * x

202 - 1.8 * x is the same as 202 - 1.8x

Answer: F. t(x) = 202 - 1.8x
3 0
3 years ago
What property is being used 9+(1+19)=9+_=
nataly862011 [7]

Answer:

20 or(1+19)

(3+17)

(19.5+.5)

there are infinity of choices

4 0
3 years ago
The length of a rectangle is represented by 3x + 4, and its width is represented by
Stella [2.4K]

Answer:

5

Step-by-step explanation:

Length of rectangle = 3x + 4

Width of the rectangle = 2x + 6

Perimeter of rectangle = 2(l + b)

45 = 2(3x + 4 + 2x + 6)

45 = 2(5x + 10)

45 = 10x + 20

45 - 20 = 5x

25 = 5x

x = 25/5

x = 5

7 0
3 years ago
What is sin 30? Use the triangle below as a guide if you need to.
leonid [27]

sin (30) =1/2

Answer: 1/2

5 0
4 years ago
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