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Tcecarenko [31]
3 years ago
8

Dana took a 20-question test and scored 85% how many problems did she answer incorrectly​

Mathematics
1 answer:
marishachu [46]3 years ago
3 0

Answer:

85/100 = x/20

100x = 1700

x = 17 questions she answered correctly

x + 17 = 20

x = 3 questions she answered incorrectly

Step-by-step explanation:

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15/23 Marks
olganol [36]

Answer: a) 6, 0, 10       b) yellow/orange line  

Step-by-step explanation:

a) Plug the x in the y functions, y = 2x² + x

when x = -2, y = 2(-2)² + (-2) = 8 - 2 = 6

when x = 0, y = 2(0)² + (0) = 0 + 0 = 0

when x = 2, y = 2(2)² + (2) = 8 + 2 = 10

b) By looking the table, the equation has a point (0,0), only blue and yellow/orange line has the passed the point (0,0), so we delete the red line option.

And we choose a point (1,3), then only yellow/orange line has passed the point (1,3). So the yellow/orange line fits the equation.

3 0
3 years ago
If a1 = 8 and an = an-1 + 5 then find the value of a5.
Nimfa-mama [501]

Step-by-step explanation:

A1=8

A2=A1+5 plug 8 into A1 here. After getting the value, put into next equation. And repeat until you get A5

A3=A2+5

A4=A3+5

A5=A4+5

5 0
3 years ago
A nursery has 480 evergreen trees, and, 75% of the trees are Norway spruce. How many of the trees are Norway Spruce?
wolverine [178]

Answer:

360 are Norway Spruce.

Step-by-step explanation:

n/480 = 75%/100

480•75%=36,000

36,000/100

360

6 0
4 years ago
15 liters increased by 60 percent
nadezda [96]

Answer:

I think it is 24!

Step-by-step explanation:

15 * 60/100 = 9 or 9 liters

15 + 9 = 24 or 24 liters

8 0
3 years ago
The question is about square root
zhuklara [117]
<span>√4
---
</span><span>√10
</span>
     √4 * √10
=  ---------------
     √10 * √10

     2 √10
=  ----------
        10

     √10
=  ----------
       5
7 0
4 years ago
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