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Allisa [31]
4 years ago
15

Which shows the expression below in simplified form? (7 × 106) × (9 × 10-2)

Mathematics
1 answer:
damaskus [11]4 years ago
5 0

Answer:

6.3 * 10^5

Step-by-step explanation:

(7 * 10^6) * ( 9 * 10^-2)

= 63 * 10^(6-2)

= 63 * 10^4

= 6.3 * 10^5  (Scientific Form).

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Find the unit rate.<br> 2378 miles in 6 hours
Georgia [21]

Answer:

396

Step-by-step explanation:

do 2378 ÷ 6 = 396

Step 1. 2378 ÷ 6 = 396

boom answer

3 0
3 years ago
Read 2 more answers
Calcular cuántos números impares hay entre 20 y 50 y calcular su suma​
const2013 [10]

Answer:

<em>La suma de los impares entre 20 y 50 da 875</em>

Step-by-step explanation:

<u>Suma de Progresiones Artiméticas </u>

Una progresión aritmética es aquella en la cual, cada término se obtiene como el anterior mas una cantidad fija llamada diferencia común. El término general de una progresión aritmética es

a_n=a_1+(n-1)r

Donde a_1 es el primer término, n el número de términos y r la diferencia común o radio. La suma de los primeros n términos se calcula como:

\displaystyle S_n=n\frac{a_1+a_n}{2}

En nuestro ejercicio, se deben sumar los números impares entre 20 y 50, se forma la progresión

21, 23, 25, 27, ....49

Sabemos que a_1=21,\ a_n=49,\ r=2

Primero averiguamos cuántos términos son, despejando n del término general

\displaystyle n=\frac{a_n-a_1}{r}+1

\displaystyle n=\frac{49-21}{2}+1

\displaystyle n=25

La progresión tiene 25 términos

Ahora la suma es

\displaystyle S_{25}=25\frac{21+49}{2}

\displaystyle S_{25}=25\frac{70}{2}

S_{25}=875

La suma de los impares entre 20 y 50 da 875

6 0
4 years ago
Solve: (x-2)(x-3)=(x+1)(x+2)<br><br> Select the appropriate response:<br> A)0.5<br> B)5.0
Sauron [17]

Answer:

Step-by-step explanation:

Let's FOIL out both sides and then see where we are after that:

x^2-5x+6=x^2+3x+2

Let's combine like terms now and get everything on one side of the equals sign and set the polynomial equal to 0 to solve for x:

0 = 8x - 4 and we can factor out a 4 to give us:

0 = 4(2x - 1)

Either 4 = 0 or 2x - 1 = 0.  Well it's obvious that 4 does not equal 0, so 2x-1 must equal 0.  Then

2x = 1 so

x = 1/2 or choice A on the left.

3 0
4 years ago
Read 2 more answers
What is the reciprocal of −3 2/7? <br><br>a.−3 7/2 <br><br>b.−2 3/7 <br><br>c.−7 2/3 <br><br>d.3 2/7
AleksandrR [38]
D.
No explanation needed
4 0
3 years ago
How does:<br><br> 12 + pi - 9pi/8<br><br> Become<br><br> 12 - pi/8<br><br> Thanks for your help.
bixtya [17]
9pi/8 = 8pi/8 + pi/8 = pi + pi/8

12 + pi - 9pi/8 = 12 + pi - pi - pi/8
4 0
3 years ago
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