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3 years ago

11

33% of what number is 1.45?

2 answers:

mario62 [17]3 years ago

7 0

33 percent of 1.45 would be 4.39

NikAS [45]3 years ago

6 0

It is 4.39 hope it helps

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Which rational number best describes Point A and Point B on the number line? *

olasank [31]

-2.75 describes the best.

7 0

2 years ago

On a particular map of Denmark, 1 inch represents 12 miles. What does 2 in a half inches on the map represent? Write a number se

Rufina [12.5K]

Answer:

30

Step-by-step explanation:

1 inch / 12 miles = 2.5 inch / x Cross multiply

1*x = 12 * 2.5 Combine

x = 30 miles

6 0

2 years ago

In a triangle ABC, measure of angle B is 90 degrees. AB is 3x-2 units and BC is x+3. If the area of the triangle is 17 sq cm, fo

Scorpion4ik [409]

Answer:

$x=\frac{8}{3}\ cm$

Step-by-step explanation:

we know that

The area of the right triangle ABC is equal to

$A=\frac{1}{2}(AB)(BC)$

we have

$A=17\ cm^2$

$AB=(3x-2)\ cm$

$BC=(x+3)\ cm$

substitute the values

$17=\frac{1}{2}(3x-2)(x+3)$

$34=(3x-2)(x+3)$

$34=3x^2+9x-2x-6$

$3x^2+7x-6-34=0$

$3x^2+7x-40=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$3x^2+7x-40=0$

so

$a=3\\b=7\\c=-40$

substitute in the formula

$x=\frac{-7(+/-)\sqrt{7^{2}-4(3)(-40)}} {2(3)}$

$x=\frac{-7(+/-)\sqrt{529}} {6}$

$x=\frac{-7(+/-)23} {6}$

$x=\frac{-7(+)23} {6}=\frac{16}{6}=\frac{8}{3}$

$x=\frac{-7(-)23} {6}=-5$

therefore

The solution is

$x=\frac{8}{3}\ cm$

6 0

2 years ago

). At a concert, people's hands were stamped as they walked in. To estimate the attendance, the staff randomly

vampirchik [111]

Answer:

7500 people

Step-by-step explanation:

8 0

2 years ago

Una masa de 16 libras viaja con una velocidad de 30 m/s . Cuál es su energía cinética?

NNADVOKAT [17]

Energía cinética = 1 / 2mv²

Donde m es la masa y v es la velocidad

De la pregunta

la masa es de 16 libras

la velocidad es de 30 m / s

16 libras es equivalente a 7.257 kg

Entonces la energía cinética es

1/2(7.257)(30)²

<h3>Que es 3265.65 julios</h3>

Espero que esto te ayude

8 0

3 years ago