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Marina CMI [18]
3 years ago
8

What is the coefficient for x2 -5x+6

Mathematics
1 answer:
Tomtit [17]3 years ago
4 0
-5 because the variable is x and a coefficient comes before the variable.

Hope this helps!
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Jean runs 8 mi and then rides 11 mi on her bicycle on a biathlon. She rides 9 mph faster than she runs. If the total time for he
Ipatiy [6.2K]

Let Jean's speed while running = x mph

Then Jean's speed while riding will be = x+9 mph

Distance covered by running = 8 miles

Distance covered by riding = 11 miles

Total time taken to complete the race = 1.5 hours

As, time=\frac{distance}{speed}

So, time for running= \frac{8}{x}

And time for riding= \frac{11}{x+9}

Equation becomes:

\frac{8}{x}+\frac{11}{x+9}=1.5

Now, multiply every term by 2x(x+9) to clear denominators:  

16(x+9)+22x=3x(x+9)

Simplifying it we get

3x^{2}-11x-144=0

Solve the quadratic equation using formula

x= \frac{-b+\sqrt{b^{2}-4ac }}{2a}

putting a=3 , b= -11, c= -144

we get (x - 9)(3x + 16) = 0

where x=9 and x=\frac{-16}{3}

Neglect the negative answer as speed cannot be negative, so x = 9 mph

Hence, Jean's running speed is 9 mph and riding speed is x+9 = 9+9 = 18 mph

4 0
3 years ago
HELP ME PLZ I NEED HELP
german

Answer:

A

Step-by-step explanation:

\frac{12}{a} = \frac{9}{b} => 12b = 9a

12 * 1.5 = 9 * 2

18 = 18

This option works

5 0
3 years ago
Helpppp with this math
Ilia_Sergeevich [38]

9514 1404 393

Answer:

  x = 8 1/3

Step-by-step explanation:

Put the known values into the equation and solve for x.

  f(x) = 3x -1

  24 = 3x -1 . . . . . use 24 for f(x)

  25 = 3x . . . . . . . add 1 to both sides

  25/3 = x . . . . . . divide both sides by 3

The input is x = 8 1/3.

4 0
2 years ago
A triangle has a base length of 12 inches and a height of 14 inches. From that
Paladinen [302]
A= bh(1/2)
a=12(14)(1/2)
a= 168(1/2)
a= 84inches
3 0
2 years ago
The vertices of a quadrilateral in the coordinate plane are known how can the perimeter of the figure be found
natta225 [31]

Answer:

d

Step-by-step explanation:

6 0
3 years ago
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