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Leona [35]
3 years ago
13

If you place a 89-foot ladder against the top of a 80-foot building, how many feet will

Mathematics
1 answer:
Nuetrik [128]3 years ago
8 0

Answer:

\large \boxed{\text{39 ft}}

Step-by-step explanation:

Let x be the distance from the foot of the ladder to the base of the building.

We have a right triangle, so we can use Pythagoras' Theorem.

\begin{array}{rcl}80^{2} + x^{2}& = & 89^{2} \\6400+ x^{2} & = & 7921\\x^{2} & = & 1521\\x & = & \sqrt{1521}\\& = &\mathbf{39}\\\end{array}\\\text{The foot of the ladder will be $\large \boxed{\textbf{39 ft}}$ from the base of the building,}

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I need help!!!! <br> Which represents the inverse of the function f(x)=4x?
Mrac [35]

Answer:

h(x)=\frac{1}{4}x.

Step-by-step explanation:

The inverse is basically you just swapping x and y.  People want to solve it for y to make it a function of x.

y=4x

Swap x and y:

x=4y

Now solve for y by dividing y on both sides:

\frac{x}{4}=y

\frac{1}{4}x=y

y=\frac{1}{4}x.

4 0
3 years ago
Which of the sequences is an arithmetic sequence?
Alchen [17]

Answer:

A

Step-by-step explanation:

there is a constant pattern from one term to another

add -7 to get to the next term

3 0
3 years ago
There are 120 people on the bus 50% get off at the first stop 20% get off at the second stop. The rest get off on the third stop
erastova [34]

Answer:

48 people

Step-by-step explanation:

First, find how many were left after the first stop:

120(0.5)

= 60

Find how many were left after the second stop:

60(0.8)

= 48

So, since the rest got off on the third stop, this means 48 people got off on the third stop.

8 0
2 years ago
Read 2 more answers
Drag the correct description to tell whether the graph represents a function.
Anna007 [38]

Using the function concept, it is found that:

  • The 1st graph is not a function.
  • The 2nd and the 3rd graph are functions.

<h3>What is a function?</h3>
  • In a <em>function</em>, <u>one value of the input can be related to only one value of the output</u>.
  • In a graph, it means that for each value of x(horizontal axis), there can only be one respective value of y(vertical axis), that is, there cannot be point that are aligned vertically.

In this problem:

  • On the <em>first </em>graph, there are points that are aligned vertically, for example, when x = -2, y = -2 and y = 2, hence, it is not a function.
  • On the <em>2nd and on the 3rd graph</em>, there are no points aligned vertically, hence, they are functions.

To learn more about the function concept, you can take a look at brainly.com/question/12463448

4 0
2 years ago
The intersection of two planes can be a point.
gregori [183]
No


If two planes intersect each other, the intersection will always be a line. where r 0 r_0 r0​ is a point on the line and v is the vector result of the cross product of the normal vectors of the two planes.
4 0
3 years ago
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