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vampirchik [111]
3 years ago
8

Solve the following equation for x. x2 + 8x + 7 = 0

Mathematics
1 answer:
igomit [66]3 years ago
7 0

Step-by-step explanation:

x² + 8x + 7 = 0

(x + 7) (x + 1) = 0

x = -7 or -1

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Can someone help me pls!!
olga nikolaevna [1]

Answer:

x=1

Step-by-step explanation:

4 0
3 years ago
Solve for p 8/9 12/p
siniylev [52]
8/9 = 12/p multiply by p on both sides
(8/9)p = 12 distribute p
8p/9 = 12 multiply by 9 on both sides
8p = 108 divide by 8
p = 108/8 simplify
p = 27/2

4 0
3 years ago
an athletic facility is building an indoor track. the track is composed of a rectangle and two semicircles, as shown. a) write a
stepan [7]

Answer:

(a) P = 2x + 2r + 2πr

(b) x = ½(P - 2r - 2πr)

(c) x = 123 feet

Step-by-step explanation:

See Attachment for sketch of the track

Solving for (a): Perimeter of the track

This is calculated by adding the perimeter of the rectangle to the 2 semicircles as follows.

P = Perimeter of Rectangle + Perimeter of 2 Semicircles

P = 2(x + r) + 2 * πr

[Where r is the radius of both semicircles]

Open bracket

P = 2x + 2r + 2πr

Solving for (b): Formula for x

P = 2x + 2r + 2πr

Make x the subject of formula

2x = P - 2r - 2πr

Divide both sides by 2

x = ½(P - 2r - 2πr)

Solving for (c): the value of x when r = 50 and P = 660

Substitute the given values in the formula in (b) above

x = ½(P - 2r - 2πr)

x = ½(660 - 2 * 50 - 2π * 50)

x = ½(660 - 100 - 100π)

x = ½(560 - 100π)

Take π as 3.14

x = ½(560 - 100 * 3.14)

x = ½(560 - 314)

x = ½ * 246

x = 123 feet

6 0
3 years ago
2. How many solutions does the equation 3x-2x + 4 = 2 +x+2 have?
Allushta [10]

Answer:

I think it is D. Because x=x and there's infinite possibilities.

6 0
3 years ago
I only need the answers to 8 an 9
musickatia [10]

Answer:

#8: distance is 3 units

#9: distance is 1 unit

Step-by-step explanation:

for #8 the x values are the same and there's a 3 unit difference between the y value

for #9 the y values are the same and there's a 1 unit difference between the x values

hope this helps chu :3

8 0
3 years ago
Read 2 more answers
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