3 years ago

(5x+28) (7x+4) find the value of x

Mathematics

1 answer:

Ilia_Sergeevich [38]3 years ago

7 0

Answer:

given p(x)= 5x^3-7x^2-ax-28

(x-4) is a factor of 5x^3-7x^2-ax-28

=>p(4)=0

=>5(4)^3-7(4)^2-4a-28=0

=>320-112-4a-28=0

=>-4a=-180

=>a=180/4

=>a=45

Step-by-step explanation:

x=a

You might be interested in

A mirror with a reflecting surface that caves inward is said to be

Marysya12 [62]

C. CONCAVE

A mirror with a reflecting surface that caves inward is said to be CONCAVE.

Clue: caves inward. )(

Convex has an outline of surface that cave outward. It is like the outside of the circle or sphere. ()

5 0

3 years ago

27. Dylan bought 3 identical shirts online for a total cost of $71.83 including a flat rate of $7.99 for shipping. Write

Sav [38]

Answer:

71.83

Step-by-step explanation:

3 0

3 years ago

The inverse of F(C)=9/5C+32

Nataliya [291]

F(C) = 9/5C + 32

I'll just change F(C) to y and 9/5C to 9/5x.
y = 9/5x + 32

inverse...

x = 9/5y + 32
9/5y = x - 32
y = 5/9x - 160/9

Sooooo
F(C) = 5/9C - 160/9

6 0

3 years ago

Find the reciprocal of the number.<br><br> 57

liberstina [14]

Answer:

$\frac{1}{57}$