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Yuri [45]
2 years ago
5

Distribute 2 (9x^2 + 3).

Mathematics
1 answer:
beks73 [17]2 years ago
5 0

Answer:

18x^2+6

Step-by-step explanation:

2(9x^2+3)

multiply each term in parentheses by 2

2 x 9x^2+2 x 3

calculate product

18x^2+2 x 3

multiply numbers

18x^2+6

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Charmaine reads 18 chapters of a book in 6 hours .What is her rate in chapters per hour?
andrew-mc [135]

Pretty sure its 3 chapters an hour

Becouse if she reads 3 chapters per hours it will be 3 X 6=18

8 0
3 years ago
Find the distance between (5, 3) and (1, 3).
Dafna11 [192]

Answer: 4 units

Step-by-step explanation:

(5-1,3-3)=(4,0)==> 4 units

7 0
2 years ago
Substitute x with (-2) and y with (-4)<br> Simplify: 5(41 - x) + {-7(y + x)} =
kkurt [141]

Answer:

257

Step-by-step explanation:

We want to evaluate:

5(41 - x) + ( - 7(y + x)

for x=-2 and y=-4.

We substitute to get:

5(41 -  - 2) + ( - 7( - 4 +  - 2)

We now simplify to get:

5(41  + 2)  - 7( - 6)

5 \times 43 + 42

215 + 42 = 257

5 0
3 years ago
Un automóvil se desplaza 30 1/5 millas en 2/3 de hora. ¿Cuál es la velocidad promedio en millas por hora, del automóvil?
yarga [219]

Queremos encontrar la velocidad promedio de un automóvil dado que conocemos cuanto se desplaza y cuanto tarda en realizar ese desplazamiento. Veremos que la velocidad promedio es 45.3 millas por hora.

Recordar que definimos velocidad promedio como el cociente entre la distancia recorrida y el tiempo que se tarda en recorrer esa distancia.

Aca tenemos:

Desplazamiento = (30 + 1/5) cm

Tiempo = (2/3 horas)

Entonces la velocidad esta dada por:

V = \frac{(30 + 1/5)mi}{2/3 h} = \frac{(151/5)mi}{2/3 h} = 45.3 mi/h

Asi podemos concluir que la velocidad promedio es 45.3 millas por hora.

Sí quieres aprender más sobre velocidad, puedes leer:

brainly.com/question/25316464

3 0
2 years ago
Read 2 more answers
Rearrange the equation so x is the independent variable. y+6=5(x-4)
soldier1979 [14.2K]

Answer:

x = (y + 26)/5

Step-by-step explanation:

Order of Operations: BPEMDAS

Step 1: Write out equation

y + 6 = 5(x - 4)

Step 2: Distribute

y + 6 = 5x - 20

Step 3: Isolate <em>x</em>

y + 26 = 5x

Step 4: Isolate variable <em>x</em>

(y + 26)/5 = x

Step 5: Rewrite

x = (y + 26)/5

7 0
3 years ago
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