1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vsevolod [243]
3 years ago
7

How do I solve this?

Mathematics
1 answer:
Ghella [55]3 years ago
8 0
The product of the two segments from the two chords are equal.

4(4+5)=(x-2)(x-2+x+4) or 36=(x-2)(2x+2) or x^2-x-20=0 or (x-5)(x+4)=0

So x=5.
You might be interested in
9 – 4x = 2x whats the ancewer
zmey [24]

Answer:

3/2 is the answer

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
In a completely randomized experimental design, three brands of paper towels were tested for their ability to absorb water. Equa
arlik [135]

Answer:

Yes. At this significance level, there is evidence to support the claim that there is a difference in the ability of the brands to absorb water.

Step-by-step explanation:

<em>The question is incomplete:</em>

<em>The significance level is 0.05.</em>

<em>The data is:</em>

<em>Brand X: 91, 100, 88, 89</em>

<em>Brand Y: 99, 96, 94, 99</em>

<em>Brand Z: 83, 88, 89, 76</em>

We have to check if there is a significant difference between the absorbency rating of each brand.

Null hypothesis: all means are equal

H_0:\mu_x=\mu_y=\mu_z

Alternative hypothesis: the means are not equal

H_a: \mu_x\neq\mu_y\neq\mu_z

We have to apply a one-way ANOVA

We start by calculating the standard deviation for each brand:

s_x^2=30,\,\,s_y^2=6,\,\,s_z^2=35.33

Then, we calculate the mean standard error (MSE):

MSE=(\sum s_i^2)/a=(30+6+35.33)/3=71.33/3=23.78

Now, we calculate the mean square between (MSB), but we previously have to know the sample means and the mean of the sample means:

M_x=92,\,\,M_y=97,\,\,M_z=84\\\\M=(92+97+84)/3=91

The MSB is then:

s^2=\dfrac{\sum(M_i-M)^2}{N-1}\\\\\\s^2=\dfrac{(92-91)^2+(97-91)^2+(84-91)^2}{3-1}\\\\\\s^2=\dfrac{1+36+49}{2}=\dfrac{86}{2}=43\\\\\\\\MSB=ns^2=4*43=172

Now we calculate the F statistic as:

F=MSB/MSE=172/23.78=7.23

The degrees of freedom of the numerator are:

dfn=a-1=3-1=2

The degrees of freedom of the denominator are:

dfd=N-a=3*4-3=12-3=9

The P-value of F=7.23, dfn=2 and dfd=9 is:

P-value=P(F>7.23)=0.01342

As the P-value (0.013) is smaller than the significance level (0.05), the null hypothesis is rejected.

There is evidence to support the claim that there is a difference in the ability of the brands to absorb water.

3 0
3 years ago
I need help with number 3
olya-2409 [2.1K]

Answer: He would earn $14

Step-by-step explanation: Since Sam had 11 games but only 9 of them were working just take 11 - 9 which = 2 then take 7 x 2 to get $14

Hope this helps

3 0
3 years ago
Read 2 more answers
There are 9 red and 6 green marbles in a bag
bagirrra123 [75]

Answer:

there are 15 marbles in the bag

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
B = 54°, b=15, c=<br> c = ? (Round answers to<br> the nearest hundredth.)
zaharov [31]

Answer:

18.54

Step-by-step explanation:

sine is opposite/hypotenuse, and you have opposite (b=15), so use that

sin(54) = 15/c

c = 15/sin54

then use calculator

c = 18.54

8 0
2 years ago
Other questions:
  • Write a fraction that is less than 5/6 And has a denominaror of 8
    8·1 answer
  • The sum of 5 consecutive integers is 505.
    7·1 answer
  • julia rented. a bike. for a week when she visted her cousin the rental cost for her bike was $12.95 per day she had. her own hel
    13·2 answers
  • Point G is the centroid of the right △ABC with hypotenuse AB=18 in. Find CG.
    8·1 answer
  • In the expression b m/n, m denotes the what​
    14·1 answer
  • please help me its due at 3:00 and i'm crying and i cant stop please please help. 30 points make sure its right for me thanks
    15·2 answers
  • Next consider a different scenario. Instead of Mexico experiencing rapid economic growth suppose that Canada experiences rapid a
    9·2 answers
  • Pls help^^^^^^^^^^^^^
    12·1 answer
  • 4.5x + 1.25=12.5 what is x?
    13·1 answer
  • If I save 20$ at the end of every month for 12 years, how much will I have?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!