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3 years ago

Which equation is the inverse of y=3x?

Mathematics

1 answer:

Iteru [2.4K]3 years ago

4 0

Answer:

y=x/3

Step-by-step explanation:

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Maya is showing her work in simplifying (5.2 − 4.5) − 5.5 + 4.8. Identify any error in her work or reasoning.

Dmitry_Shevchenko [17]

If putting 5.2 and 4.5 in fraction form, her error must have been timing 3 by 3 to 5.2 and 4.5 as a fraction. Meaning that 5.5 and 4.8 is wrong

7 0

3 years ago

Devante has a lunch account in the school cafeteria His starting balance at the beginning of the month is $35.50. The first wook

Alisiya [41]

Answer:

D the amount of money he pays for each lunch

Step-by-step explanation:

In each lunch Devante has, he pays 2,50 $ according to:

Money in t = t₀ he has 35,50 $ paid 3 lunches and spent

35,50 - 28 = 7,5

Then the cost of each lunch is 7,5 / 3 = 2,5 $

After that

bought 5 lunches and spent 28 - 15,5 = 12,50

Again 12,5 / 5 = 2,5 $

Now the model for the situation is a straight line with a slope 2,5

In an x , y cartesian system in which y is money in the account and x is the number of lunches, such a straight line will be

y = b - m*x ( b the intercept on y and m the negative slope)

y = 35,50 - 2,5*x

So answering the question is lyrics D the amount of money he pays for each lunch

7 0

3 years ago

HEYYYYYYYYYYYYYYY

zepelin [54]

Answer:

y = -3 (you have to draw an horizontal line that passes for the point (0,-3)

Step-by-step explanation:

We have to find the middle points of the segments that unite the corrispettive points.

We are lucky because the images of the points have the same x coordinate of the original ones, so we have just to find the y coordinates.

Segment CC‘

(y1 + y2)/2 = (-1-5)/2 = -3

Segment AA’

(0-6)/2 = -3

Segmet BB’

(1-7)/2 = -3

Segment DD’

(1-7)/2 = -3

In conclusion we can say that the points of the reflection have all the y coordinate equal to -3.

the line is horizontal and its equation is : y = -3

5 0

3 years ago

A bricklayer can build a wall of a certain size in 5 hours. Another bricklayer can do the same job in 4 hours. If the bricklayer

Tju [1.3M]

Answer:

Step-by-step explanation:

7 0

3 years ago

Limit

STatiana [176]

Rationalize the numerator:

$\dfrac{\sqrt{x+4}-2}x\cdot\dfrac{\sqrt{x+4}+2}{\sqrt{x+4}+2}=\dfrac{(\sqrt{x+4})^2-2^2}{x(\sqrt{x+4}+2)}=\dfrac x{x(\sqrt{x+4}+2)}=\dfrac1{\sqrt{x+4}+2}$

This is continuous at $x=0$ , so we can evaluate the limit directly by substitution:

$\displaystyle\lim_{x\to0}\frac{\sqrt{x+4}-2}x=\lim_{x\to0}\frac1{\sqrt{x+4}+2}=\frac1{\sqrt4+2}=\frac14$

5 0

4 years ago