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Vinil7 [7]
3 years ago
13

Y = 3(-1)+1 This is my own problem

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
6 0

Answer: -2

Step-by-step explanation:

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Which of the following statements about the mean is false?
Harlamova29_29 [7]

Answer:

The value of the mean reflects both the number and the value of cases. is false

Step-by-step explanation:

8 0
3 years ago
Maria is comparing the prices of two window cleaning companies. Company A charges $6 per window and an additional $12 as service
rewona [7]
Part A Answer: Company A: (Wx6)+12 Company B: (Wx5)+15 The varible used was W because windows start with a W i chose this as the variable because it is for the certain NUMBER of windows. Part B:Company A: 8x6=48+12=$70 for 8 windows and service charges. Company B:8x5=40+15=$55 for 8 windows and service charges. Company B would charge less for 8 windows. Part C:My work for Company A: 6x6=36+12=$48 for 6 windows and service charges My work for Company B: 6x5=30+15=$45 for 6 windows + service charges $48-$45=$3 Answer for Part C: $3 would be saved by using the services of Company B instead if Company A to clean 6 windows.
8 0
3 years ago
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I really need help with this
zysi [14]

Answer:

Our system of equations is:

  • y+2x+1=0
  • 4y-4x²-12x = -7

We are looking for x

Let's express y using x

  • y+2x+1=0
  • y= -2x-1

Replace x in the second equation with the result

  • 4y-4x²-12x = -7
  • 4(-2x-1)-4x²-12x = -7
  • -8x-4-4x²-12x = -7
  • -8x-4x²-12x = -7+4
  • -4x²-20x = -3
  • -4x²-20x+3 = 0          multiply by -1 to get rid of the - signs with x
  • 4x²+20x-3=0

4x²+20x+3=0 is a quadratic equation

Let Δ be our discriminant

  • a= 4
  • b= 20
  • c= -3

Δ= 20²-4*4*(-3)

Δ=448 > 0 so we have two solutions for x

let x and x' be the solutions

  • x = \frac{-20-\sqrt{448} }{8}= -5.145 ≈ -5.15
  • x'= \frac{-20+\sqrt{448} }{8}= 0.145≈ 0.15

so the solutions are:

-5.15 and 0.15

7 0
3 years ago
The diagram shows several planes, lines, and points. Vertical plane P intersects horizontal plane R at line f. Vertical plane T
lbvjy [14]

Answer:

the answer is D

Step-by-step explanation:

6 0
2 years ago
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Find the length of the lamppost to the nearest inch.
olganol [36]

Answer:

109 inch

Step-by-step explanation:

we know that

tan\theta=\frac{Perp}{Base} \\\theta=70\\Base=40 in

So,

tan(70)=\frac{Perp}{40} \\\\2.747=\frac{Perp}{40} \\\\2.747\times40=Perp\\\\Perp=109\quad in

So, length of lamppost is 109 inch

5 0
2 years ago
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