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3 years ago

The function fx) =ax-4 will never cross the x-axis if a is positive. A. True B. False

Mathematics

1 answer:

boyakko [2]3 years ago

8 0

Answer:

False because a linear equation always crosses the x axis (unless x is zero, which it isn't in this case).

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50 points please help i need it so bad

ki77a [65]

Answer:

Step-by-step explanation:

Recall that for a function $f$ such that $f:X \to Y$ , where $X$ is the Domain and $Y$ is the Codomain, the function has a inverse, if and only if, $\forall y \in Y$ exist an unique $x\in X$ such that $f(x)=y$ .

$\therefore f^{-1}(y)=x \iff f(x)=y$

Therefore, the inverse of $f$ for $f(x)=\dfrac{3-x}{7}$ is

$f^{-1} =3-7x$

==============================================

$f(x)=\dfrac{3-x}{7} \implies y= \dfrac{3-x}{7} \implies x=\dfrac{3-y}{7}$

$x=\dfrac{3-y}{7} \implies 7x = 3-y \implies 7x -3 = -y \implies -7x +3 = y \implies f(x)=3-7x$

6 0

3 years ago

Type the integer that makes the following addition sentence true: + 83 = 19

OLEGan [10]

Answer:

The answer is: -64

Step-by-step explanation:

To get the answer of -64, you would have to subtract. To subtract you would use this equation: 19 - 83. This would get you -64. To double check your answer, you would add -64 + 19 to make sure your answer is 83.

I would appreciate if you mark me as brainliest! :D

3 0

3 years ago

Ajar holding 36 coins, only nickels and quarters, is worth $6.20. There are eight more quarters than there are nickels. How many

Nonamiya [84]

Answer:

Step-by-step explanation:

Let n represent the number of nickels. Then the number of quarters is 36-n. The difference is ...

(36-n) -n = 8 . . . . . 8 more quarters than nickels

18 -n = 4 . . . . . . . divide by 2

14 = n . . . . . . . . add n-4 to both sides

There are 14 nickels in the jar.

_____

Additional comment

The problem supplies more information than is needed for a solution. You can work this as a "sum and difference" problem, as we have above, or you can work it as a "mixture" problem where the total coin value comes into play. Any two of the three given relations will give a solution.

n + q = 36 . . . . . . . number of coins

5n +25q = 620 . . . value of coins (in cents)

q -n = 8 . . . . . . . . difference in number of coins

6 0

3 years ago

Help please thanks so much

s2008m [1.1K]

The majority of the members are 13 years old (50/50 13 or younger). Most of the members are on the older side, with the exception of one member, who is significantly younger than the others.

4 0

3 years ago

Read 2 more answers

Which of the following functions has a vertex of (-4,3) and a line of symmetry of x= -4?

natali 33 [55]

Answer:d

Step-by-step explanation:

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3 years ago