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LenaWriter [7]
3 years ago
7

Please help me out i will reward brainliest

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
5 0
I can not see the picture so i caN NOT HELP SORRY

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Please help, will mark Brainly and if you need help with anything I’ll help with any work you send
inessss [21]

Answer:

The first one is missing (d - 9) so it would be 5(d -9) or when you factor it out 5d - 45

In the second one (d + 7) is missing so it will be 8d(d + 7) so if you factor that out you will receive 8d^2 + 56

Step-by-step explanation:

3d^2 + 18d -21 =(3d -3)( d + 7)

3d^2 -30d +27 =(3d -3)(d - 9)

6 0
3 years ago
Suppose the same quantity is measured but with a more precise method giving an average and standard deviation of 15.0 ± 2.5. how
abruzzese [7]

To solve this, we use the z test.

The formula:

z = (x – u) / s

where x is sample value = 20, u is the mean = 15, and s is the standard deviation = 2.5

z = (20 – 15) / 2.5

z = 2

Since we are looking for values greater than 20, this is right tailed test. We use the standard distribution tables to find for P.

P = 0.0228

 

Therefore:

number of students = 100 * 0.0228 = 2.28

 

<span>2 to 3 students will get greater than 20 measurement</span>

7 0
3 years ago
Simplify 7 sqare root 3 takeaway 2 sqare root 3 add sqaure root 3 takeaway 3 sqaure root 3
Paha777 [63]

Answer:

tel:+18446450594

Step-by-step explanation:

8 0
2 years ago
P
statuscvo [17]

Answer:

18ywjhtzk8ywbhuj

Step-by-step explanation:

ujzjtzjdjwjduxhxhwbsusuww

4 0
2 years ago
What is the property used for 0+91=91
Lisa [10]
<u><em>The additive identity property </em></u>. . . is being used here because no matter what the value is, whenever you add zero (0) to it, you'll always get the value your started with.
6 0
3 years ago
Read 2 more answers
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