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2 years ago

Find the dot product, a • b. a = 6i + 5j, b = -5i + 4j

Mathematics

2 answers:

zysi [14]2 years ago

4 0

If i is a normal variable: then it is -30i^2 - i*j + 20j^2

If i is the constant i, then it is 20j^2 -i*j + 30

Readme [11.4K]2 years ago

4 0

Answer:

the answer is -10

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The average shoulder height of the grizzly bear is 3.35 feet. The average shoulder height of the polar bear is 4.4 feet. How muc

White raven [17]

The polar bear is 1.05 feet taller.

7 0

2 years ago

All fractions between 0 and 1/4

AVprozaik [17]

Such fractions are infinitely many, but will write you a few:
We extend a fraction of ten:
$\frac{1*10}{4*10}=\frac{10}{40}$
Our expressions must be in the range of 0, and $\frac{10}{40}$
$\frac{1}{40}$

$\frac{2}{40}$

$\frac{3}{40}$

$\frac{4}{40}$

$\frac{5}{40}$

$\frac{6}{40}$

$\frac{7}{40}$

$\frac{8}{40}$
<span>
$\frac{9}{40}$ </span>

6 0

3 years ago

Read 2 more answers

At the ritz concert tickets for adults cost $6 and tickets for students cost $4. How many of each ticket were purchased if 480 t

Anni [7]

Answer: the number of adult tickets is 210

The number if student tickets is 270

Step-by-step explanation:

Let x represent the number of adult tickets that were purchased.

Let y represent the number of student tickets that were purchased.

At the ritz, concert tickets for adults cost $6 and tickets for students cost $4. If the cost of total tickets purchased is $2340, then,

6x + 4y = 2340 - - - - - - - -1

Total number of tickets purchased is 480. This means that

x + y = 480

x = 480 - y

Substituting x = 480 - y into equation 1, it becomes

6(480 - y) + 4y = 2340

2880 - 6y + 4y = 2340

- 6y + 4y = 2340 - 2880

-2y = - 540

y = - 540/-2 = 270

x = 480 - 270

x = 210

4 0

2 years ago

Simplity (6 1/4) ^ 4

tatuchka [14]

Answer: 81/16

Please mark em as Brainliest

5 0

2 years ago

Suppose that dP/dt = 0.19P(t) represents a mathematical model for the growth of a certain cell culture, where P(t) is the size o

leva [86]

Answer: 380000 cells/hour

Step-by-step explanation:

Given that dP/dt = 0.19P(t)

where

P(t) is the size of the culture (measured in millions of cells) at time t > 0 (measured in hours).

The formula above represents a mathematical model for the growth of a certain cell culture. In essence, it represents the time rate of the growth of the cell culture, that is how fast the cell culture is growing.

Therefore, when P = 2 million cells:

dP/dt = 0.19 * 2000000 = 380000 cells/hour

Hence, the cell culture is growing at 380000 cells per hour.

8 0

3 years ago