MATHEMATICS MIDDLE SCHOOL

If 5x^2 - 15x = 0 and x ≠ 0, find the value of x.(A) -10
(B) -3
(C) 10
(D) 5
(E) 3

Answers

Answer 1
Answer: 5x^2 - 15x = 0
5x (x - 3) = 0
5x = 0
x = 0
x - 3 = 0
x = 3

Since x cannot equal 0, x = 3 is your answer.

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Find the missing coefficient. -___________ y2 − [-5y − y(-7y − 9)] − [-y (15y + 4)] = 0

Answers

Answer:

Missing Coefficient is -8

Step-by-step explanation:

We are given, _y² - [ -5y - y( -7y -9) ] - [ -y(15y + 4) ] = 0

We have to find missing value.

let missing value be a

ay² - [ -5y - y( -7y - 9) ] - [ -y(15y + 4) ] = 0

ay² - [ -5y + 7y² + 9y ] - [ -15y² - 4y ] = 0

ay² - [ 7y² + 4y ] + 15y² + 4y = 0

ay² - 7y² - 4y + 15y² + 4y = 0

ay² - 7y² + 15y² + 4y - 4y = 0

( a - 7 + 15 )y² = 0

RHS can be written as

( a - 7 + 15 )y² = 0.y²

Now comparing coefficient of both sides we get,

a - 7 + 15 = 0

a + 8 = 0

a = -8

Therefore, Missing Coefficient is -8
  y = 0 
Hope this helps! (:

3+z=-19 true, false, or open

Answers

subtract 3 from both sides to get 3+z=-19 3+z-3=-19-3 z = -22 So it's only true when z = -22. This means that it's neither 100% true nor 100% false. So it's an open statement or sentence

First thing you would do is subtract 3 from both sides to get 3+z=-19 3+z-3=-19-3 z = -22 So it's only true when z = -22. This means that it's neither 100% true nor 100% false. So it's an open statement or sentence

Eva wants to make two pieces of pottery. She needs 3/5 pounds of clay for one piece and 7/10 pounds of clay for the other. She has three bags of clay that weigh 4/5 pounds each. How many bags of clay will she need to make both pieces of pottery? How many bags of clay y she have leftover?

Answers

 3/5 + 7/10 = 6/10 + 7/10 = 13/10 = 1 and 3/10 lbs. needed 

She has 4/5 *3/1 bags = 12/5 = 2 and 2/5 pounds 

2 2/5 - 1 3/10 = 2 4/10 - 1 3/10 = 1 and 1/10 pounds left over

Hope I helped:P

Solve 2x^2 +16x+50=0

Answers

2x^2 +16x+50=0\ \ \ \ \ |:2\n\nx^2+8x+25=0\n\nx^2+2\cdot x\cdot4+25=0\ \ \ \ |+4^2\n\n\underbrace{x^2+2\cdot x\cdot4+4^2}_((a+b)^2=a^2+2ab+b^2)+25=4^2\ \ \ \ \ |-25\n\n(x+4)^2=16-25\n\n(x+4)^2=-9 < 0-NO\ REAL\ SOLUTION

COMPLEX\ SOLUTIONS\n\n(x+4)^2=-9\to x+4=\pm√(-9)\n\nx+4=-3i\ \vee\ x+4=3i\ \ \ \ |-4\n\nx=-4-3i\ \vee\ x=-4+3i

What is the y-intercept of the line described by the equation below? y = -5x + 7

Answers

positive 7 is the y-intercept of the equation

Answer:

(0,7)

Step-by-step explanation:

Convert one third to a decimal

Answers