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3 years ago

PLEASE HELP!!! WORTH 3 GRADES

Mathematics

2 answers:

Rufina [12.5K]3 years ago

6 0

The correct answer should be D

Marizza181 [45]3 years ago

5 0

Actually , the correct answer is A.
If u want to know why, just comment and I'll tell u.

Hope this helps!!
Please make brainliest to help me out!!
Thanks!!

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Consider the following expression<br><br> 2y+1+9x<br><br> Select all of the true statements below.

Harman [31]

Answer:

2y+1+9x is written as a product of three factors

5 0

2 years ago

Will mark as brainliest if correct

lana [24]

Answer:

wala sa choices ang sagot.

ANS: 128

EXPLANATION

a(9)=14+2(9-1)

a(9)=14+2(8)

a(9)=16(8)

9= 128

yan sagot ko po

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3 years ago

Find the segment length indicated. Assume that lines which appear to be tangent

Jobisdone [24]

Answer:

its righties b

Step-by-step explanation:

5 0

3 years ago

NEED HELP ON THIS QUESTION ASAP

Katarina [22]

Answer:

Step-by-step explanation:

A+B+C+D=360

A=180 as it half of the circle

B+C+D=180

60+C+90=180

150+C=180

C=180-150=30

The fraction of the circle to region C

30/180=1/6

8 0

3 years ago

Read 2 more answers

Suppose that the pH of soil samples taken from a certain geographic region is normally distributed with a mean pH of 7 and a sta

Otrada [13]

Answer:

a) P=0

b) P=1

c) P=0

d) X=7.1645

Step-by-step explanation:

We have the pH of soil for some region being normally distributed, with mean = 7 and standard deviation of 0.10.

a) What is the probability that the resulting pH is between 5.90 and 6.15?

We calculate the z-score for this 2 values, and then compute the probability.

$z_1=(X_1-\mu)/\sigma=(5.9-7.0)/0.1=-11\\\\z_2=(X_2-\mu)/\sigma=(6.15-7)/0.1=-8.5$

Then the probability is

$P(5.90$

b) What is the probability that the resulting pH exceeds 6.10?

We repeat the previous procedure.

$z=(6.10-7)/0.1=-9\\\\P(x>6.1)=P(z>-9)=1$

c) What is the probability that the resulting pH is at most 5.95?

$z=(5.95-7)/0.1=-10.5\\\\P(x$

d. What value will be exceeded by only 5% of all such pH values?

We have to calculate the value of pH for which only 5% is expected to be higher. This can be represented as P(X>x)=0.05.

In the standard normal distribution, it happens for a z=1.645.

$P(z>1.645)=0.05$

Then, we can calculate the pH as:

$x=\mu+z\sigma=7.0+1.645*0.1=7.0+0.1645=7.1645$

4 0

3 years ago