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nydimaria [60]
3 years ago
6

HELP !! PLEASE 20 characters rule

Mathematics
1 answer:
Marysya12 [62]3 years ago
5 0

Answer: (x+(-4))^2 + (-67)

Step-by-step explanation:

To get -8, you must have (x-4)^2, and the expanded form of that is x^2-8x+16, so you need to subtract 67 to get 51.

You might be interested in
A. 17.5<br> b. 20<br> c. 22.5<br> d. 25
serg [7]

Answer:

x = 22.5

Step-by-step explanation:

∠2 and ∠7 are known as alternate exterior angles. This makes them equal to each other.

100 = 4x + 10

90 = 4x

22.5 = x

8 0
3 years ago
Find the volume of a right circular cone that has a height of 9.1 cm and a base with a circumference of 13.3 cm. Round your answ
diamong [38]

Answer:

Volume = 42.8 cubic centimeters

Step-by-step explanation:

The volume of right circular cone is:

V=\frac{1}{3}\pi r^2 h

Where

r is the radius

h is the height

We are given height of 9.1 cm

h = 9.1

We aren't given radius explicitly, we are given circumference of 13.3, so we need to figure out radius from that. Lets do this:

C=2\pi r\\13.3=2\pi r\\r=\frac{13.3}{2\pi}\\r=2.12

So,

r = 2.12

Now, substituting in cone formula, we get the volume to be:

V=\frac{1}{3}\pi r^2 h\\V=\frac{1}{3}\pi (2.12)^2 (9.1)\\V=42.83

Rounded to nearest 10th is 1 decimal place, so

<u>Volume = 42.8 cubic centimeters</u>

6 0
3 years ago
Write an equation that is perpendicular to y=3/5x-1 and passes through the point (9,14)
Leokris [45]

Answer:

y=(-5/3)x+29

Step-by-step explanation:

we will use the base formula y=mx+b

In order to be perpendicular, the slope must be the flipped fraction and have the opposite sign, so our m is (-5/3)

y=(-5/3)x+b

You can plug in the (9,14) point in order to find the b

14=(-5/3)(9)+b

14=(-45/3)+b

14=(-15)+b

14+15=b

29=b

and so altogether our equation is y=(-5/3)x+29

8 0
3 years ago
Let xy=3 and dy/dt=4. Find dx/dt when x=5
tino4ka555 [31]

Answer:

xy = 3

d/dt(xy) = d/dt(3)

ydx/dt + xdy/dt = 0

y = 3/x so substitute 3/5 for y, 5 for x, and 5 for dy/dt; and solve for dx/dt.

3/5(dx/dt) + 5(5) = 0

3/5(dx/dt) = -25

dx/dt = -125/3

Step-by-step explanation:

this should be able to help you :)

4 0
3 years ago
What is x-x+3+x?<br> I don't really get this ^^
kipiarov [429]

Answer:

4x is the answer

Step-by-step explanation:

3x + x= 4x + x = 5x - x = 4x

3 0
3 years ago
Read 2 more answers
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