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3 years ago

When might it be easier to use the percent equation rather than the percent proportion

1 answer:

7 0

No it's a lot easier to use percent equation because it's easier to correct if wrong and you can get a better understanding of percent equation.

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What are the values of a, b, and c in the quadratic equation 0 = x2 – 3x – 2?

iren2701 [21]

For this case we have that by definition, a quadratic equation is of the form:

$ax ^ 2 + bx + c = 0$

Where the roots are given by:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

We have the following equation:

$x ^ 2-3x-2 = 0$

Then, according to the definition, the values are:

$a = 1\\b = -3\\c = -2$

Answer:

$a = 1\\b = -3\\c = -2$

5 0

3 years ago

Read 2 more answers

Determining Components of an Exponential Function A doctor estimates that a particular patient is losing bone density at a rate

Ipatiy [6.2K]

Answer:

f(x) = 1500(0.97)ˣ

Step-by-step explanation:

Given that:

f(x) = abˣ

a is the initial bone density, that is the bone density at 0 years, x is the number of years and b is any real value. For an exponential growth, b > 1 while for an exponential decay, b < 1.

Since the bone has a current density of 1,500 kg/m³, hence a = 1500.

The density is lost at a rate of 3% annually, therefore b = 100% - 3% = 97% = 0.97.

Therefore substituting the values of a and b into the function gives:

f(x) = 1500(0.97)ˣ

4 0

3 years ago

Solve the equation algebraically -8(3y+5)=14

inysia [295]

Answer:

y = -2.25

Step-by-step explanation:

-8(3y+5) = 14

-8(3y+5)/-8 = 14/-8

3y+5 = -1.75

3y+5-5 = -1.75-5

3y = -6.75

3y/3 = -6.75/3

y = -2.25

6 0

3 years ago

Which of the following is always true about lines of symmetry?

viva [34]

A line of symmetry divides a shape into two equal parts. I think

7 0

3 years ago

Read 2 more answers

Find DEC pls give through explanation

galina1969 [7]

$\large{\rm{\underline{\underline{Answer:}}}}$

Angle AEB and Angle DEC are opposite angles which means they are equal in measure. Hence,

⇛ Angle AEB = Angle DEC

⇛ 9x + 8° = 3x + 42°

⇛ 9x - 3x = 42° - 8°

⇛ 6x = 34°

⇛ x = (34/6)°

To find: Angle DEC = 3(

34/6 °) + 42° = 59° (Ans)

3 0

3 years ago