96b
72b+24
18b+14
2b+6
8. True or false: in order to solve the following equation, you would first subtract by 4, then multiply by 5/1 *
4+1/5=-1
To solve 3x + 2 = 23 you must:
Subtract 2 from both sides so like this 3x+2−2=23−2 and get 3x=21.
Now Divide both sides by 3 so 3x/3=21/3. Mainly divide 21/3 and get 7.
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To solve -2y - 7 = 3 you must:
Add 7 to both sides so like this −2y−7+7=3+7 and get −2y=10.
Now Divide both sides by -2 so -2y/-2=10/-2. Mainly divide 10/-2 and get 5.
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False
3x – 9y = 0
–x + 3y = –3
A. infinitely many
B.1
C.2
D.0
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What is the solution to the system of equations?
2x + y= -3
x - 2y= -4
(___,___)
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In a recent golf match, Tiger’s score was 4 less than Phil’s score. Their combined scores totaled 140. Let p represent Phil's score and t represent Tiger's score.
Which pair of equations can be used to determine their scores?
A. p – t = 140
p + t = 4
B. p + 140 = t
p = 4
C. p + t = 140
p – t = 4
D. p + t = 140
p + t = 4
(i think this one is C)
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The system of equations is coincident.
What are the missing values?
3x + y= 7
9x + __ y= __
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Allison and her husband Noah both get in their cars and begin to drive at the same time. Allison starts 360 mi from their home and drives directly home at a constant rate of 50 mph. Noah starts at their home and drives away from the home at a constant rate of 40 mph. The system that models this situation is given, where d represents the distance from home, and t represents time, in hours. The solution to the system is (4, 160).
What is the correct interpretation of the solution to this system?
d = 360 - 50t
d =40t
A. Noah will be 160 mi from home and Allison will be 4 mi from home.
B. Allison and Noah will both be 160 mi from home after 4 h.
C. Noah will be 4 mi from home and Allison will be 160 mi from home.
D. Allison and Noah will both be 4 mi from home when they drive for 160 min.
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please help me I dont understand these.