All categories

3 years ago

Please help me find the value of x

Mathematics

2 answers:

Novay_Z [31]3 years ago

7 0

Set the equations to equal each other because the angles are equal.
8x - 63 = 4x - 27
+63 on both sides
8x = 4x + 36
-4x on both sides
4x = 36
/4 on both sides
x = 9

Answer:
x = 9

miskamm [114]3 years ago

7 0

Answer:

hhhhhhhhhhhhhhhhhhh

Step-by-step explanation:

x=9

You might be interested in

Identify the type of sequence. 1/10, 3/20, 5/30, 7/40...

Ray Of Light [21]

Answer:its A because i answer this two months ago

Step-by-step explanation:

8 0

3 years ago

A 10-foot ladder leans against a wall so that it is 6 feet high at the top. The ladder is moved so that the base of the ladder t

konstantin123 [22]

Answer:

The top of the ladder is now at 10 ft.

Step-by-step explanation:

At the start, we have a height H=6, a length L=10 and a base B, that has to be calculated by the Pythagorean theorem:

$B^2=L^2-H^2=10^2-6^2=100-36=64\\\\B=\sqrt{64}=8$

The base is moved twice the distance the height moves up.

We called this distance x, so we have:

$L^2=(H+x)^2+(B-2x)^2=H^2+2Hx+x^2+B^2-4Bx+4x^2\\\\L^2=(H^2+B^2)+5x^2+(2H-4B)x\\\\L^2=L^2+5x^2+(2H-4B)x\\\\0=5x^2+(2H-4B)x\\\\5x+(2H-4B)=0\\\\x=\dfrac{4B-2H}{5}=\dfrac{4*8-2*6}{5}=\dfrac{32-12}{5}=\dfrac{20}{5}=4$

The new height (H+x) is

$H'=H+x=6+4=10$

The base travels 2x=8, so the new base B' is 0.

This means that the ladder is all against the wall (L=H').

6 0

3 years ago

5) Find the area of the composite figure.

Sholpan [36]

Answer:

HOPE IT HELPS THANK ME LATER.

4 0

3 years ago

A box contains four 75 W lightbulbs, three 60 W lightbulbs, and three burned-out lightbulbs. Two bulbs are selected at random fr

Law Incorporation [45]

Answer:

a. 0.689

b. 0.8

c. 0.427

Step-by-step explanation:

The given scenario indicates hyper-geometric experiment because because successive trials are dependent and probability of success changes on each trial.

The probability mass function for hyper-geometric distribution is

P(X=x)=kCx(N-k)C(n-x)/NCn

where N=4+3+3=10

n=2

k=4

P(X>0)=1-P(X=0)

The probability mass function for hyper-geometric distribution is

P(X=x)=kCx(N-k)C(n-x)/NCn

P(X=0)=4C0(6C2)/10C2=15/45=0.311

P(X>0)=1-P(X=0)=1-0.311=0.689

P(X>0)=0.689

The mean of hyper-geometric distribution is

μx=nk/N

μx=2*4/10=8/10=0.8

The variance of hyper-geometric distribution is

σx²=nk(N-k).(N-n)/N²(N-1)

σx²=2*4(10-4).(10-2)/10²*9

σx²=8*6*8/900=384/900=0.427

6 0

3 years ago

Error Analysis: A student solves the equation S=2Lw+2Lh+2Wh for W and his answer are W=S-2Lh-2Lh\h Describing and correct the st

serious [3.7K]

S=2LW+2LH+2WH

First, subtract 2LH from both sides
S-2LH=2LW+2LH-2LH+2WH
S-2LH=2LW+2WH

Separate out the W
S-2LH=W(2L+2H)

Divide by 2L+2H to get W alone

$\frac{S-2LH}{2L+2H} =W$

Hope this helps.

3 0

3 years ago