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julia-pushkina [17]
3 years ago
13

A 15 foot ladder is leaning against a wall. if the foot of the ladder is sliding away from the wall at a rate of 10 ft/sec, at w

hat speed is the top of the ladder falling when the foot of the ladder is 9 feet away from the base of the wall?
Mathematics
1 answer:
Step2247 [10]3 years ago
6 0
<span>Your answer is 19 ok</span>
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If x + y = 12 and xy = -5, calculate the value of 1/x + 1/y.​
Paul [167]

\dfrac{1}{x}+\dfrac{1}{y}=\dfrac{y}{xy}+\dfrac{x}{xy}=\dfrac{x+y}{xy}=\dfrac{12}{-5}=-\dfrac{12}{5}=-2,4

8 0
3 years ago
If angle 1 and angle 2 are vertical angles, and the m&lt;1 = 10x - 9 and m&lt;2 = 4x + 15. Find the value for x.
weeeeeb [17]

Answer:

x = 4

Step-by-step explanation:

Vertical angles are equal.

m∠1 = m∠2

10x - 9 = 4x + 15

Add 9 to both sides

10x = 4x + 15 + 9

10x = 4x + 24

Subtract 4x from both sides

10x -4x = 24

6x = 24

Divide both sides by 6

x = 24/6

x = 4

6 0
3 years ago
The values of sine and cosine are always between 0 and 1. True or False
o-na [289]

Answer: True

Step-by-step explanation:

The length of the sides of a right triangle are always less than the length of the hypotenuse.

Also, the ratio of any side of a triangle and the hypotenuse is always less than 1.

3 0
3 years ago
Read 2 more answers
Find the point slope equation for (-2,-20) and (9,79)
dem82 [27]
Start by identifying your x1, x2, y1, and y2 values
x1: -2
x2: 9
y1: -20
y2: 79

The general form for writing a point slope equation is y-y1 = m(x-x1)
M is your slope.
To find the slope, plug the values you just identified into the equation y2-y1/x2-x1
This leaves you with 79+20/9+2
Which equals 9, so your slope (m) equals nine.
you can now plug everything into the general form which gives you:
y+20 = 9(x+2)
3 0
3 years ago
Mark Brainliest and show ur work
BaLLatris [955]

Answer:

It has two solutions

Step-by-step explanation:

The system \frac{3}{4z}=\frac{1}{4z-3}   + 5

If we try to simplify the fractions applying the Lesser Common Factor

We obtain this:

12z-9=4z+ 5(4z)(4z-3)

From this equation, you can see a square term coming up, from where we can say that this system has two solutions

6 0
3 years ago
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