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2 years ago

Find the value of x (5x+4) (8x-71)

Mathematics

2 answers:

Scilla [17]2 years ago

4 0

Answer:

x = -4/5 or x = 71/8

Step-by-step explanation:

Solve for x:

(5 x + 4) (8 x - 71) = 0

Split into two equations:

5 x + 4 = 0 or 8 x - 71 = 0

Subtract 4 from both sides:

5 x = -4 or 8 x - 71 = 0

Divide both sides by 5:

x = -4/5 or 8 x - 71 = 0

Add 71 to both sides:

x = -4/5 or 8 x = 71

Divide both sides by 8:

Answer: x = -4/5 or x = 71/8

Leto [7]2 years ago

4 0

Answer:

−11360

are factor (−1)×2

×5×71

Step-by-step explanation: for -11360

(5×+4)(8×−71)

Multiply 5 and 4 to get 20.

20×8(−71)

Multiply 20 and 8 to get 160.

160(−71)

Multiply 160 and −71 to get −11360.

−11360

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F(x)=bx^2+32 For the function f defined above, b is a constant and f(2)=40. What is the value of f(-2)?

zhuklara [117]

Answer:

f(-2) = 0

Step-by-step explanation:

Given that:

f(x) = bx^2 + 32

f(2) = b(2)^2 + 32

f(2) = 4b + 32

f(2) = 4b = -32

f(2) = b = -32/4

f(2) = b = -8

Thus;

f(-2) = -8(-2)^2 + 32

f(-2) = -8(4) + 32

f(-2) = -32 + 32

f(-2) = 0

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2 years ago

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charle [14.2K]

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2 years ago

The radius of the base of a cylinder is decreasing at a rate of 121212 kilometers per second. The height of the cylinder is fixe

WARRIOR [948]

Answer:

7536 $km^3/sec$

Step-by-step explanation:

Given that:

Rate of decreasing of radius = 12 km/sec

Height of cylinder is fixed at = 2.5 km

Radius of cylinder = 40 km

To find:

The rate of change of Volume of the cylinder?

Solution:

First of all, let us have a look at the formula for volume of a cylinder.

$Volume = \pi r^2h$

Where $r$ is the radius and

$h$ is the height of cylinder.

As per question statement:

$r$ = 40 km (variable)

$h$ = 2.5 (constant)

$\dfrac{dV}{dt} = \dfrac{d}{dt}\pi r^2h$

As $\pi, h$ are constant:

$\dfrac{dV}{dt} = \pi h\dfrac{d}{dt} r^2\\\Rightarrow \dfrac{dV}{dt} = \pi h\times 2 r\dfrac{dr}{dt} \\$Putting the values:$\\\Rigghtarrow\dfrac{dV}{dt} = 3.14 \times 2.5\times 2 \times 40\times 12 \\\Rigghtarrow\dfrac{dV}{dt} = 7536\ km^3/sec$

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2 years ago

Which quadratic function has a vertex at (-1,4) and is translated up 4, translated left 1, and compressed horizontally?

myrzilka [38]

Answer:

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Step-by-step explanation:

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2 years ago

Look at the pic attached

Anni [7]

Answer:

x= -8 BDC= 68

EXPLANATION:

They create a straight angle which is always equal to 180. this means you must add both equations and set them equal to 180.

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2 years ago