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3 years ago

Let \[f(x) = \frac{3x - 7}{x + 1}.\] find the domain of f. give your answer as an interval.

Mathematics

1 answer:

BlackZzzverrR [31]3 years ago

5 0

The domain of f is all real numbers except for -1.

so the domain is x ∈ (-∞,-1)U(-1,∞)

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Determine the slope and y-intercept of the linear relationship described by the equation. y=x2 + 5 The slope is and the y-interc

Dmitriy789 [7]

Answer:

slope is 2. y-intercept is (0,5)

Step-by-step explanation:

The slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept. y = mx + b. Find the values of m and b using the form y = mx + b.

8 0

2 years ago

How is the number 5 ditterent in the numbers 52127 and 5478?

ki77a [65]

Answer:

the 5 in 52127 is 50000 the 5 in 5478 is only 5,000

Step-by-step explanation:

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3 years ago

Molly took part in a math quiz and scored 55 points on 30 questions. Of the questions, there were 3-point word problems, 2-point

seropon [69]

Answer:

$3\ point\ word = 5$

$2\ point\ word = 15$

$1\ point\ word = 10$

Step-by-step explanation:

Given

Represent

3-point word with T;

2-point with U and

1-point with V

$U = 5 + V$ --- (1)

If total questions is 30, then

$T + U + V = 30$ --- (2)

If total points is 55, then

$3T + 2U + V = 55$ --- (3)

Substitute 5 + V for U in (2) and (3)

$T + U + V = 30$ --- (2)

$T + 5 + V + V = 30$

$T + 5 + 2V = 30$

$T + 2V = 25$ ---- (4)

$3T + 2U + V = 55$ --- (3)

$3T + 2(5 + V) + V = 55$

$3T + 10 + 2V + V = 55$

$3T + 10 + 3V = 55$

$3T + 3V = 55 - 10$

$3T + 3V = 45$

Divide through by 3

$T + V = 15$ ---- (5)

Subtract (5) from (4)

$(T + 2V = 25 )- (T + V = 15)$

$T - T + 2V - V = 25 - 15$

$V = 10$

Recall that:

$U = 5 + V$

$U = 5 + 10$

$U = 15$

Substitute 10 for V in (5)

$T + V = 15$

$T + 10 = 15$

$T = 5$

3 0

3 years ago

Helpp i really neeed it

Marizza181 [45]

Answer:

9 hours

Step-by-step explanation:

If she makes $ 20 for each car, washing 9 cars in 3 hours would get $ 180.

So she will need to work 9 hours 180 + 180 + 180, washing 9 cars in 3 hours and would get $ 540. This is enough to buy her phone and she will have a surplus of $ 120.

In summary she must work 9 hours

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3 years ago

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irina [24]

Answer:

Step-by-step explanation:

4 0

3 years ago

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