6. An object is placed in a room where the temperature is 20°C. The temperature of the object drops by 5 °C in 4 minutes and by 7 °C in 8 minutes. What was the temperature of the object when it was initially placed in the room?

Q: 1. Solve using substitution 2x + y = 14   3x - 2y = 7

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Q: Solve for y. x+4 = 5  2-y      3

A: given that x+42-y=53 solve for y

Q: 17. Solve the equation 8x +1 = 5x

A: Given     8x2+1=5x  ⇒ 8x2+1-5x=0  ⇒ 8x2-5x+1=0 Compare the above equation with ax2+bx+c=0 we have,…

Q: solve for w. 3w2+7w+4

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Q: Solve a, = 2an-1+ 3an-2 with ao= 1, a,= 6. %3D

A: Given an=2an-1+3an-2 with a0=1, a1=6 We will solve the given recurrence relation.

Q: 6. Solve for x. 1S- 28 6x +7

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Q: Each part describes a rectangle. Please symbolize and solve for each rectangle’s dimensions. (a)…

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Q: 6. -30 4 2) -5 -10 40 寸

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Q: Solve for b. Q=a+b+c b= X

A: The given equation is: Q=a+b+c Solve for b.

Q: 2. Solve: V3x + 4 = x 1. 4 2. 4,-1 3. -1 4. No solution

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Q: Solve. 2r + 8 4 2r - 4 2 The solution set is

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Q: Solve. x+y+z = 3 2x +y-z = 8 x-y+z = - 5 The solution set is {OID}: (Simplify your answer.)

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Q: Solve. x² +y° = 25 y² = 5-x Ay 6- 4- -> -6 -4 -2 6. -2- -6- 2.

A: The given system of equations is  x2+y2=25y2=5-x Solve the equations using the substitution method.

Q: Solve. Vy +4 - y+2 = 0 3. Solve. Vĩ +1 = Vx +2 2.

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Q: 32 Solve: +5 %3D х+4 х2-16

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Q: Distribute the LCD to each term: %3D y+ y %3D 2y(r+y) (2+y)(x2-ay+y) Factor out the GCF in the…

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