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Olenka [21]
3 years ago
15

If a=3i+9j and b=4i-6j, find 5a-3b Write your answer in the form i + j.

Mathematics
1 answer:
Hatshy [7]3 years ago
7 0

Answer:

3i + 63j

Step-by-step explanation:

Step 1: Replace the variables with the given statements

5(3i+9j) - 3(4i-6j)

Step 2: Distribute

15i + 45j -12i + 18j

Step 3: Combine like terms

3i + 63j

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(sorry this is a repost, mods please delete the first one, thanks!)
erma4kov [3.2K]

Answer:

AR = 24

RB = 25

Step-by-step explanation:

I assume ABCR is a rectangle.

If so, the opposite sides are equal:

AR = BC

3x + 6 = x + 18

2x = 12

x = 6

Therefore, AR = 3x + 6 = 24.

RB is found with Pythagorean theorem:

RB² = RC² + BC²

RB² = 7² + 24²

RB = 25

5 0
4 years ago
Un medico receta a un paciente tomar una pastilla cada 6 horas y un jarabe cada 8 horas. Si
Xelga [282]

Queremos ver cuando será la proxima vez que una persona <u>tome dos medicamentos al mismo tiempo</u> dado que los toma en intervalos regulares.

Veremos que luego de 24 horas el paciente volvera a tomar ambos medicamentos juntos.

Sabemos que el paciente toma una pastilla cada 6 horas y un jarabe cada 8 horas.

El paciente volvera a tomar ambos medicamentos juntos en el primer multiplo comun de 6 y 8.

Para encontrarlo podemos simplemente escribir los multiplos de cada uno y ver cual es el primero que aparece para ambos números:

6*1 = 6

6*2 = 12

6*3 = 18

6*4 = 24

y

8*1 = 8

8*2 = 16

8*3 = 24

Podemos ver que 24 es un multiplo comun (el primero) de 6 y 8.

Esto significa que luego de 24 horas el paciente volvera a tomar ambos medicamentos juntos.

Sí quieres aprender más, puedes leer:

brainly.com/question/21476724

3 0
3 years ago
Y=-4x+5 and 3x-2y=-1 what are the like terms
kiruha [24]

Answer:

Dear math why dont you grow up and solve your own problems

Step-by-step explanation:

8 0
3 years ago
192ft oz=pt What is the answer to the problem
joja [24]
There are 12 pints in 192 fl oz 



8 0
3 years ago
Help me plzzzz I don’t know what I’m doing it’ll mean a lot
Sindrei [870]

Given:

\angle ABC\cong \angle D EF

\angle GHI\cong \angle DE F

To prove:

\angle ABC\cong \angle GHI

Solution:

The two common proof is:

Statements                                    Reasons

1. \angle ABC\cong \angle DE F                          1. Given

2. \angle GHI\cong \angle D EF                         2. Given

3. \angle ABC\cong \angle GHI                         3. Transitive property of congruence.

Hence proved.

7 0
3 years ago
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