Putting answers on the next one !!
1. Is the equation true, false, or open?
5x + 2 = 6x + 11
2. Which value is a solution of the equation 5 – 4x = –3?
3.Which ordered pair is a solution of the equation y = x – 3?
4.Which ordered pair is a solution of the equation y = 4x?
5.Which ordered pair is a solution of the equation y = –5x + 4?
6.Tony and his sister Maria have the same birthday, but Tony is five years older than Maria. Let the variable x represent Tony’s age and y represent Maria’s age. Which graph represents the relationship between Tony’s age and Maria’s age?
7.Solve the following equation.
–5 = x + 3
8.Solve the following equation.
x – 3 = –5
9.Solve the following equation.
2.8 = 2y
10.Solve the following equation.
–9 = Start Fraction r over 4 End Fraction
11.Solve the following equation.
–4 = seven over thirty-three times x
12. Which equation is an identity?
13.Which equation has no solution?
14.Solve the following equation.
5(z – 4) – z = 4z – 20
15.Solve the following equation.
3 + 6z = 13 + 6z
16.Ella and Margaret were at a carnival. They each got a ticket for the Ferris wheel. Ella got a snow cone, and Margaret got a cotton candy. Ella had a certificate for $6 off the cost. Margaret paid the rest, which came to $12.75. Each Ferris wheel ticket was $5, and a snow cone was $3.50. What was the cost for cotton candy?
17.Solve the following equation.
3(y – 5) + 2 = 5
18.Solve the following equation.
70 = –7(–2 – 2z)
19.Solve the following equation.
–4y + 8 = 4(2y – 2) – 2(–16 + 8y)
20. question 20 through 22 TYPING QUESTIONS
Heres the answers
1.Open; there is a variable.
2. B. 2
3.D. (5, 2)
4.B. (–1, –4)
5.D. (5, –21)
6. Answer is letter B
7.D. x = –8
8.B. x = –2
9.A. y = 1.4
10.D.r = –36
11.B.x = Negative one hundred thirty two over seven ( x = -132/7 )
12.B.5w + 8 – w = 6w – 2(w – 4)
13.A.5v + 3 = 5v – 5
14.C.infinitely many solutions
15.D.no solution
16.B.$5.25
17.D.y = 6
18.A.z = 4
19.B.y = 4
20. I got half credit for this because I messed up
21. I got half credit for this because I messed up
22. -8x=30
x= -15/4
x = -15/4
1. Is the equation true, false, or open?
5x + 2 = 6x + 11
It's open, but not just because there's a variable.
If it had been 5x + 2 = 5x + 11
then it would have been false, since no value of x would have made it true.
similarly, the equation
5x+2 = 3x + 2 + 2x
would be true, since any value of x would have worked.