MATHEMATICS MIDDLE SCHOOL

Substiution method: y + 9 = 1/5x and45 - 3y = -15x

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Substiution method: y + 9 = 1/5x and 45 - - 1

Answers

Answer 1
Answer: y+9=1/5x menjadi y= 1/5x -9
sesudah ini sibtusika n dalam persamaan 4x - 5y = -15x
                                                             4x -5(1/5x-9)= -15 x
                                                             4x + x+45=-15x
                                                             5x +45 = -15x                                                                                                            45=-20x 
                                                              x=-45/20
                                                              x= -9/4
 
 y+9 =1/5x
   y      = 1/5(-9/4)-9
      y     = -189/20
  (-9/4,-189/20)

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Bonsoir à tous, j'ai besoin d'aide urgemment en maths si possible et merci d'avance. L'exercice est photographié ci-dessus

Answers

m<SAB = 180 - 58,5 = 121,5

180 - 121,5 - 34,1 = 23,4

(sin 121,5)/SB = (sin 23.4)/18,7

SB = (sin 121,5 * 18,7)/(sin 23,4)

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Answers

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HOPE THIS HELPED
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N/2+4=-4. I need help I cannot figure this out and I left.my math binder at my school. :/ plz halp :3

Answers

(n)/(2) +4=-4

Multiply both sides by 2 :

(n)/(2) *2+4*2=(-4)*2

n+8 =-8

Subtract 8 from both sides:

n+8-8=-8-8

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hope this helps!
first subtract four from both sides and get n/2=-8. Then multiply both sides by 2 and get n=-16

The volume of the rectangular prism is 240 cubic centimeters. A rectangular pyramid has the same length, width,and height as a prism.What is the volume of the pyramid?

Answers

The volume of the pyramid would be 80 cubic centimeters. The reason for this is because the formula for volume of a pyramid is 1/3bh, so if all the dimensions are the same for both figures, just divide the volume of the prism by three to find the volume of the pyramid. If you do this 240÷3=80 or the volume of the pyramid.

Answer:

If the volume of the prism is 240 cubic inches, what is the area of the base?

Step-by-step explanation:

Answer =  40 square inches D.

The volume of the prism is area of the base times height. The height of the rectangle is 6 inches. Therefore,

V = (area of base)(h)

240= 6a

h = 40 square inches

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Answers

The answer is D.9.6. This is because you multiply 8 x (-4.8)= -38.4 and since you divided it by another negative it becomes positive. Hope this helped.
D. Hope this helped good luck god bless!
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