Question

test help

Answer 1

154

KK52
Best Response



Medals 1
1. y = –x + 2
y = 3x – 1 (1 point)




2. –4x + 3y = –12
–2x + 3y = –18 (1 point)




For questions 3–6, how many solutions does each system have?

3. x = –4y + 4
2x + 8y = 8 (1 point)
one
two
infinite
none
4. y = 6x + 2
3y – 18x = 12 (1 point)
one
two
infinite
none
5. x – 2y = 6
3x – 6y = 18 (1 point)
one
two
infinite
none
6. y – 5x = –6
3y – 15x = –12 (1 point)
one
two
infinite
none
For questions 7–8, what is the graph of the inequality in the coordinate plane?

7. x ≥ 4 (1 point)




8. y < –2 (1 point)




9. A local citizen wants to fence a rectangular community garden. The length of the garden should be at least 110 ft, and the distance around should be no more than 380 ft. Which system of inequalities and graph represents the possible dimensions of the garden? (1 point)




10. Tom has a collection of 30 CDs and Nita has a collection of 18 CDs. Tom is adding 1 CD per month to his collection while Nita is adding 5 CDs per month to her collection. After how many months will Tom and Nita have the same number of CDs? (1 point)
1 month
3 months
2 months
33 months
11. Kendra owns a restaurant. She charges $3.00 for two eggs and one piece of toast and $1.80 for one egg and one piece of toast. How much does Kendra charge per egg? How much per piece of toast? (1 point)
$1.20 per egg; $0.60 for toast
$0.60 per egg; $1.20 for toast
$0.60 per egg; $0.60 for toast
$1.20 per egg; $1.20 for toast
For questions 12–13, which graph represents the solution to the given system?

12. y = 5x + 4
y = 5x – 3 (1 point)




13. y = –5x – 2
y + 2 = –5x (1 point)




14. What is the solution of the system? Use substitution.

2x – y = –7
4x – y = –4
(1 point)
(–1.5, 4)
(1.5, 10)
(4, –1.5)
(–1.5, –2)
15. What is the solution of the system? Use elimination.

5x + 7y = 32
8x + 6y = 46
(1 point)
(8, 5)
(1, 5)
(7, 0)
(5, 1)
16. Mike and Kim invest $12,000 in equipment to print yearbooks for schools. Each yearbook costs $5.00 to print and sells for $15.00. How many yearbooks must they sell before their business breaks even? (1 point)
800 yearbooks
1,200 yearbooks
2,400 yearbooks
1,800 yearbooks
17. A baker has a bag of flour that is 11% whole wheat and a bag of flour that is 63% whole wheat. How many cups of each type does the baker need to make 12 cups of a flour mixture that is 50% whole wheat? (1 point) (1 point)
3 cups of the 11% flour and 9 cups of the 63% flour
9 cups of the 11% flour and 3 cups of the 63% flour
3 cups of the 11% flour and 3 cups of the 63% flour
9 cups of the 11% flour and 9 cups of the 63% flour
18. A science teacher has a supply of 5% hydrochloric acid and a supply of 65% hydrochloric acid (HCl). How much of each solution should the teacher mix together to get 42 mL of 45% HCl for an experiment? (1 point)
The teacher will need 14 mL of the 5% solution and 28 mL of the 65% solution.
The teacher will need 28 mL of the 5% solution and 14 mL of the 65% solution.
The teacher will need 14 mL of the 5% solution and 14 mL of the 65% solution.
The teacher will need 28 mL of the 5% solution and 28 mL of the 65% solution.
For questions 19–21, which graph represents the given inequality?
19. y < 4x – 2 (1 point)




20. 3x – 7y < –21 (1 point)




21. An electronics store makes a profit of $72.00 for every television sold and $90.00 for every computer sold. The manager’s target is to make at least $360.00 a day on sales from televisions and computers. Which of the following represents three possible solutions to the problem? (1 point)




For questions 22–24, which graph represents each system of inequalities?

22. y ≤ x + 4
2x + y ≤ –4
(1 point)




23. y ≤ –x – 1
y ≥ 2x + 4
(1 point)




24. What system of inequalities is represented by the graph?
(1 point)
y ≥ x + 8
8x + y ≥ 8
y ≤ x + 3
8x + y ≤ –8
y ≤ –x + 8
3x + y ≥ –8
y ≤ x + 8
3x + y ≥ –8

Answer 2

@Kainui

Answer 3

How about close this and ask one question at a time. I can help you understand so that you get the right answer.