1) If CB= 13; BF= 9; EF=7; Then DE=?
Round to the Hundredths.
(Hint: (whole secant)(external part) = (whole secant)(external part)
FIND DE=?
SHOW ALL WORK!!
HURRY I NEED IT FAST!!
WILL MARK BRAINLIEST!!

9514 1404 393

Answer:

Step-by-step explanation:

The tangent of the angle can be found using the identity for the tangent of the difference of angles.

  tan(α-β) = (tan(α) -tan(β))/(1 +tan(α)tan(β))

The tangent of the angle of each vector is the ratio of the j coefficient to the i coefficient.

  tan(α) = -2/3

  tan(β) = 4/7

  tan(α-β) = (-2/3 -4/7)/(1 +(-2/3)(4/7))

  = (-14-12)/(21 -8) = -26/13 = -2

Then the magnitude of the angle between the vectors is ...

  arctan(2) ≈ 63.43°

Answer:

34

Step-by-step explanation:

17.25/2 = 8.62500

8.62500/0.25 = 34 quarter coins,

117 - 34.5 = 83 pennies

Answer:

314 ft²

Step-by-step explanation:

(100 × pi) ft²

100 × 3.14 ft²

314 ft²

Answer:

[tex] - 12[/tex]

Step-by-step explanation:

1) Simplify 5 - 3 to 2.

[tex](1 - 2) \times 2 + 5 \times - 2[/tex]

2) Simplify 1 - 2 to -1.

[tex] - 1 \times 2 + 5 \times - 2[/tex]

3) Simplify -1 × 2 to -2.

[tex] - 2 + 5 \times - 2[/tex]

4) Simplify 5 × -2 to -10.

[tex] - 2 - 10[/tex]

5) Simplify.

[tex] - 12[/tex]

Therefor, the answer is -12.

Answer:

This is your answer . IfI'm right so,

Please mark me as brainliest. thanks!!!

Answer:

12÷3=4

4inches is 2/3 of a foot.

Answer:

Step-by-step explanation:

The central angle is twice the inscribed angle (same arc).

The inscribed angle forms a supplementary angle with the missing one (opposite angles of the cyclic quadrilateral).

The missing angle is:

Answer:

d  

Step-by-step explanation:

Answer:C

Step-by-step explanation:

Answer:

A) 252pi

Step-by-step explanation:

The volume of a sphere is [tex]\frac{4}{3}\pi r^{3}[/tex]

First, let's find the diameter of the large sphere.

If D=12, then R=6

[tex]\frac{4}{3}\pi 6^{3}=288\pi[/tex]

Then, we need to find the volume of the smaller sphere

[tex]\frac{4}{3}\pi 3^{3}=36\pi[/tex]

[tex]288\pi -36\pi =252\pi[/tex]

Hope this helps :)

[tex]-noorati[/tex]

Answer:

i think it would be 6/96 not sure tho

Step-by-step explanation:

It looks like you have

tan²(x) / (1 - tan(x)) + cot(x) / (1 - tan(x)) = cot(x) + tan(x) + 1

but this is not an identity.

Take for instance x = 3π/4. Then

tan(3π/4) = -1

cot(3π/4) = -1

so that

tan²(x) / (1 - tan(x)) + cot(x) / (1 - tan(x)) = 0

while

cot(x) + tan(x) + 1 = -1

and of course 0 ≠ -1.

Answer:

(10,-1)

Step-by-step explanation:

Answer:

10,-1

Step-by-step explanation:

when going right it adds a positive number to the x axis

when going left it adds a negative number to the x axis (same as subtracting)

when going up it adds a positive number to the y axis

when going down it adds a negative number to the y axis (same as subtracting)

Answer:

i need help please with my maths

Step-by-step explanation:

Answer:

Step-by-step explanation:

What are the options?

Answer:

(7,0) ---> (x = 7) and (y = 0)

Step-by-step explanation:

2x – 9y = 14

x= -6y +7     <-- (Substitute for x to above equation)

---------------------------------------------------------------------------------------------------------

2(-6y +7)– 9y = 14

-12y + 14 - 9y = 14    <-- combine like terms

-21y + 14 = 14  

        -14 = -14   <-- inverse operation on both sides

      -21y = 0     <-- Divide

          y = 0  <--- Substitute for y to get x  ↓

-------------------------------------------------------------------------------------------------------

2x – 9y = 14

2x – 9(0) = 14     <-- Substituted y from above

          2x = 14     <-- Divide

            x = 7

Answer:

The answer is 17.5

Hope this helps

Answer:

a)5xx-5x=5x²-5x

b)-2x(x+10)

c)5x²+4xy-y²

d)2x³-7x²-15x

e)6x²y+6x²+8xy+8x

f)79y²+22y³-90y

Answer:

D

Step-by-step explanation:

I'm not American so I don't know if I translated it right but I think it's

-3y+2u+2

if you just remove the parentheses

The error Chaim made in his proof is: D. Chaim used a criterion (SSA) that does not guarantee congruence.

The SSA congruence theorem only exist and holds true, only if the congruence non-included angles in both triangles are either obtuse or right angles and have two pairs of congruent sides.

Thus:

The two triangles given have a pair of non-included congruent angles that are less than 90 degrees.

Therefore, the error Chaim made in his proof is: D. Chaim used a criterion (SSA) that does not guarantee congruence.

Learn more about SSA theorem on:

https://brainly.com/question/19258025

To find:

Any two quadratic equations​.

Solution:

The general form of a quadratic equation is:

[tex]ax^2+bx+c=0[/tex]

Where, a,b and c are real number and a is non zero.

We know that a,b,c can take any values but a cannot be 0.

For a=1, b=1,c=1, we get

[tex]1x^2+1x+1=0[/tex]

[tex]x^2+x+1=0[/tex]

One quadratic equation is [tex]x^2+x+1=0[/tex].

For a=3,b=-1,c=5, we get

[tex]3x^2+(-1)x+5=0[/tex]

[tex]3x^2-x+5=0[/tex]

Therefore, the two quadratic equations are [tex]x^2+x+1=0[/tex] and [tex]3x^2-x+5=0[/tex].

I really hope this helped you in some way. sorry I took so long!! Good luck :)

Answer:

-13-7=-20

5+4=9

<-20,9>

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

The value of x is dependant on the value of y.

Step-by-step explanation:

y = (number)x + (another number)

I need a PNG or  picture to give you a factual answer to the value of X.

Answer:65

Step-by-step explanation:

Answer:

65

Step-by-step explanation:

Hey There!

So where the given angles are is in a triangle called an isosceles triangle

In isosceles triangles to of the angles are congruent

The congruent angles are near the letters Q and R

we are given that angle 1 =50

so to find the missing angles we subtract 180 from 50 and divide by 2

180-50=130

130/2=65

so angle 2 = 65