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9966 [12]
3 years ago
15

While driving on the highway, Fiona averages 60 miles per hour. In the city, she averages 30 miles per hour. On a trip to her gr

andmother's house, Fiona drives 312 hours on the highway and 112 hours in the city.
Mathematics
1 answer:
jok3333 [9.3K]3 years ago
6 0
52.1 miles per hour would be your answer.
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Sam is designing a fence post for his yard. He will need to construct a perpendicular line through the point above the line to m
Margaret [11]

Answer:

Step-by-step explanation:

D is correct.  The idea here is to ensure that the point on the post is equidistant from the bottom of the post (where it meets the ground), which in turn ensures that the angle between ground and post is 90° in at least two places on the ground.

6 0
3 years ago
Read 2 more answers
Use inverse operations to find the inverse of y = 27x?<br> The inverse of y = 27x3 is y =
VLD [36.1K]

Answer:

  y = (∛x)/3

Step-by-step explanation:

To undo the multiplication by 27, you multiply by its inverse:

  (1/27)y = (1/27)(27x^3)

  y/27 = x^3 . . . . . . . . . . . simplify

To undo the cube, you take the cube root:

  (∛y)/(∛27) = ∛(x^3)

  (∛y)/3 = x

Apparently, you want the inverse function, so you swap the variables:

  y = (∛x)/3

_____

You can swap the variables at the beginning or end. It doesn't matter. If you do it at the beginning, you have ...

  x = 27y^3

and you're solving for y. You use the same inverse operations that we used above.

7 0
3 years ago
Heya ~
KATRIN_1 [288]

In this exercise we have to use subtraction knowledge to calculate the final value of the equation, like this:

Letter C

<h2>What is subtraction?</h2>

It is a mathematical operation in which it is possible to find a quantity by decreasing one number by another, it is opposed to addition, being represented by the minus sign.

So make the calculus we have:

y=x-7\\x=4\\y=4-7\\y=-3

See more about subtraction at brainly.com/question/4319655

4 0
2 years ago
Read 2 more answers
Which term completes the product so that it is the difference of squares?
FromTheMoon [43]

Answer:

the answer is  3

Step-by-step explanation:

(-5x-3)(-5x+3)=(5x)^2 - (3)^2

A difference of squares is the difference of two squared terms.

We have

a^2 - b^2

We can factorize the difference of squared terms like this:

a^2-b^2 = (a+b)(a-b)

We have (-5x-3)(-5x+3)

Lets prove it:

(-5x-3)(-5x+3) = (-5x*-5x)+(-5x*3)+(-3*-5x)+(-3*3)

(-5x-3)(-5x+3) = 25x^2+(-15x)+(15x)+(-9)

(-5x-3)(-5x+3) = 25x^2-15x+15x-9

(-5x-3)(-5x+3) = 25x^2-9

(-5x-3)(-5x+3) = (5x)^2 - (3)^2

6 0
3 years ago
Read 2 more answers
1 more than twice as many CDs is 17
Zinaida [17]

Answer:

original number is 8

Step-by-step explanation:

3 0
2 years ago
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