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3 years ago

Please answer: is y = 4x - 9 a function?

Mathematics

1 answer:

r-ruslan [8.4K]3 years ago

4 0

Answer:

Yes.

Step-by-step explanation:

Yes.

y = 4x - 9 is the equation of a line with slope 4and y-intercept -9.

All non-vertical lines are functions.

Since a line with slope 4 is not a vertical line, this relation is a function.

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Evaluate the expression. r = , v = , w = v ⋅ w

FromTheMoon [43]

Answer:

v . w= -13

Step-by-step explanation:

Evaluate the expression: v ⋅ w Given the vectors: r = <8, 1, -6>; v = <6, 7, -3>; w = <-7, 5, 2>

Solution

Given the vectors:

r = <8, 1, -6>

v = <6, 7, -3>

w = <-7, 5, 2>

If you're asking about the dot product.

The dot product is a scalar. It is the sum of the product of the corresponding components.

v.w = (6*-7) + (7*5) + (-3*2)

= -42+35-6

= -13.

6 0

3 years ago

Colton left his house for work and was gone 5 hours. He spent a total of } hour driving to and from work and didn't go anywhere

Solnce55 [7]

Answer:

4 $\frac{3}{4}$ hours

Step-by-step explanation:

he was gone for 5 $\frac{1}{4}$ hours, he spent $\frac{1}{2}$ an hour driving.

5 $\frac{1}{4}$ - $\frac{1}{2}$ = 4 $\frac{3}{4}$ hours at work.

6 0

3 years ago

Each model represents one whole. In which model does the shaded section represent the product of 5/8 and 3/8?

Mnenie [13.5K]

We can’t answer this question without a photo of the model. Can you post a photo of the question?

8 0

3 years ago

Please help me asap!!!

ololo11 [35]

G should be the correct answer

Hope this helps!

4 0

3 years ago

Read 2 more answers

Gregory draws a scale drawing of his room. The scale that he uses is 1cm: 4ft. On this drawing, the room is 3cm long. Which equa

stepladder [879]

The equation can be used to find the actual length of Gregory's room is:

$\frac{1\ cm}{4\ feet } = \frac{3\ cm }{x\ feet }$

Solution:

Given that,

The scale that he uses is:

1 cm : 4 feet

On this drawing, the room is 3 cm long

Let "x" be the actual length of room

Therefore,

1 cm : 4 feet

3 cm : "x" feet

This forms a proportion. Therefore,

$\frac{1\ cm}{4\ feet } = \frac{3\ cm }{x\ feet }$

Therefore, Option C is correct

Given that,

Rob chose A as the correct answer. Which is,

$\frac{1}{4} = \frac{x}{3}$

But option A is wrong

So, Rob made a mistake in measuring the equivalent ratio, it should be $\frac{1\ cm}{4\ feet } = \frac{3\ cm }{x\ feet }$

3 0

3 years ago