3 years ago

Review

Mathematics

1 answer:

garri49 [273]3 years ago

4 0

Answer:

1.32

Step-by-step explanation:

we have the known,

2.13 km * 0.6214 miles = 1.323521 or 1.32 miles

1 km

You might be interested in

Given: 3x < -9. Choose the solution set. {x | x < 3} {x | x > -1/3} {x | x < -3} {x | x > -3}

Mars2501 [29]

Divid both sides by 3
x<-3

{x | x<-3}

3rd choice

6 0

3 years ago

Which exspression is equivalent to :

dlinn [17]

Answer:

Step-by-step explanation:

4 0

3 years ago

How do u factor this

PilotLPTM [1.2K]

You can factor a parabola by finding its roots: if

$p(x)=x^2+bx+c$

has roots $x_1,\ x_2$ , then you have the following factorization:

$p(x) = (x-x_1)(x-x_2)$

In order to find the roots, you can use the usual formula

$x_{1,2} = \dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

In the first example, this formula leads to

$x_{1,2} = \dfrac{-2\pm\sqrt{4+4}}{2} = \dfrac{-2\pm\sqrt{8}}{2} = \dfrac{-2\pm2\sqrt{2}}{2} = 1 \pm \sqrt{2}$

So, you can factor

$x^2-2x-1 = (x-1-\sqrt{2})(x-1+\sqrt{2})$

The same goes for the second parabola.

As for the third exercise, simply plug the values asking

$f(1.5)=-5.25$

you get

$f(-1.5) = 1.5c-3 = -5.25$

Add 3 to both sides:

$1.5c = -2.25$

Divide both sides by 1.5:

$c = 1.5$

7 0

3 years ago

A local Pennysaver charges $11 for each of the first three lines of a classified ad, and $5 for each

krok68 [10]

What’s the question?

6 0

2 years ago

Read 2 more answers

The population of a city decreases by 4.3% per year. If this year's population is p, which expression represents next year's pop

astra-53 [7]

P+4.3%=0 p=-4.3% for each year

6 0

2 years ago