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miskamm [114]
2 years ago
5

How to find z statistic for test?

Mathematics
1 answer:
alexandr402 [8]2 years ago
3 0
The z-score is calculated by the formula (x - mu)/sigma, where x is the value, mu is the mean, and sigma is the standard deviation.
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Solve.<br> 3(x-4) = -3<br> How do i slove this
astraxan [27]

Answer:

3(x - 4) =  - 3 \\ 3x + 12 =  - 3 \\ 3x =  - 15 \\ x =  - 5

Firstly, multiply the number and variable in the perenthesis. Then move the variable on it's own side of the equation. The simplify.

8 0
3 years ago
Read 2 more answers
Can someone please help me
AVprozaik [17]

Answer:

Lines RQ and SP are perpendicular to SR

Step-by-step explanation:

SR are parallel to PQ so that means that RQ and SP are perpendicular to SR

6 0
3 years ago
Laura’s fish tank has 17 liters of water in it. She plans to add 5 liter per minute until the tank has more than 72 liters. What
Hoochie [10]
T= number of minutes

Multiply 5 liters by number of minutes (t), then add the 17 liters already in the tank. This totals 72 liters or more.

17 + 5t ≥ 72
subtract 17 from both sides

5t ≥ 55
divide both sides by 5

t ≥ 11 minutes


ANSWER: Laura could add water for 11 minutes to be sure the tank has 72 liters or more.

Hope this helps! :)
3 0
3 years ago
Two-thirds had their picture taken. If 124 had their picture taken, how many total?
krok68 [10]

Answer:

93

Step-by-step explanation:

if you do 124*\frac{3}{4}

6 0
3 years ago
Read 2 more answers
Find the 57th derivative of y = cos(7x).
mel-nik [20]
                      y = cos(7x)

First derivative = -7sin(7x)

Second derivative = - (7^2)cos(7x)

3rd derivative = (7^3)sin(7x)

4th derivative =  (7^4) cos(7x)

5th derivative = -(7^5) sin (7x)

6th derivative = -(7^6) cos(7x)

nth derivative ?

Analysis and conclusion

If n is multiple of 4 or a number before a multiple of 8 the sign is positive

If n is one or two numbers after a multiple of 4 the sign is negative.

7 is raised to exponent n

if n is odd the function is sin(7x), if n is even the function is cos(7x)

n = 57 => odd, and it is a number after 56 which is a multiple of 4 => negative sign

Therefore, the 57th derivative = - (7^57)sin(7x)

6 0
2 years ago
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