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Ivahew [28]
3 years ago
10

Last one, Help with math please 18-20 on the pdf. I do not know how to post a picture I am so sorry.

Mathematics
2 answers:
tatuchka [14]3 years ago
8 0
Question 18
The answer is 4 days. 
Because, 
Kevin =3×n
Anita =4+ (2×n)
Equating the two equations. 
3n=4+2n
3n-2n=4
n=4

Question 19
When the solution is (4,1), it means the value of y=1 and x=4. 
The answer is;
y=x-3
y=-3x+13. Since when the values of x and y are substituted they satisfy the system. 

Question 20
The system has no solution.
This is because the line are parallel and they do not intersect to give a solution. 



soldier1979 [14.2K]3 years ago
6 0
Hello,
Please, see the attached files.
Thanks.

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Sonja [21]

To solve this, you need to isolate/get the variable "u" by itself in the inequality:            u = unknown number

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2u - 3 + 3 < 1 + 3

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u < 2       (u is any number less than 2)

When the inequality sign is >/< (greater than/less than), the dot/endpoint is an open/unfilled circle.

When the inequality sign is ≥/≤ (greater than or equal to/less than or equal to), the dot is a closed/filled circle.

u < 2        

Start making a ray by placing an open circle on 2(click on the dot/endpoint to change it to be open if it isn't already), then have the ray point left where the numbers would be decreasing because "u" is any number less than 2. If you can place the end of the ray at the end of the number line.

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3 years ago
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B! hope that helped
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