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Maru [420]
3 years ago
15

NEED HELP

Mathematics
1 answer:
Sladkaya [172]3 years ago
5 0

Answer:

2.60

Step-by-step explanation:

z-score is the difference between the score and mean, divided by the standard deviation.

z = \frac{x - \mu}{\sigma}

z = \frac{91-77.5}{5.2} = \frac{13.5}{5.2} \approx 2.596

So 2.6 is an answer close enough.

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What is the solution to the equation?
pashok25 [27]

Answer:

x= 27

Step-by-step explanation:

Move <u>constant</u> to the right-hand side and change its sign.

\sqrt{2x+10} = 2+6

Add the numbers.

\sqrt{2x+10}= 8

Square both sides of the equation.

2x+10= 64

Move the <u>constant</u> to the right-hand side and change its sign.

2x= 64-10

Subtract the numbers.

2x= 54

Divide both sides of the equation by 2.

x= 27

4 0
4 years ago
Read 2 more answers
Can y’all help me on this
Yuri [45]
Redo the question I can’t see the picture
5 0
3 years ago
100 Points and I WILL mark brainliest for first correct answer.
lesya [120]

Answer:(a) Co-ordinate rule is  and  

(b) Co-ordinates of B' and C' are  and  respectively.

Step-by-step explanation:

(a)

Here, the co-ordinates of A are translated to A'.

For the co-ordinates A and A',   and  

So, x value of A has shifted to right by 6 units and y value of A has shifted 8 units down.

Hence, the co-ordinate rule that maps ΔABC onto ΔA'B'C' is:

and .

(b)

Using the co-ordinate rule, we can find the co-ordinates of B' and C'.

For B,  and .

So,  of B' is  

And,  of B' is .

Therefore, co-ordinates of B' are .

For C,  and .

So,  of C' is  

And,  of C' is .

Therefore, co-ordinates of C' are .

Step-by-step explanation:

3 0
3 years ago
Find a z-score that has a distribution less than 30.5%
Ludmilka [50]
To the right: 0.51
to the left: -0.51
8 0
3 years ago
Read 2 more answers
What is the value of 3x +2 when x = 5​
Bingel [31]

Answer:

17

Step-by-step explanation:

Always put questions like these with an equal sign

3x + 2 = ?

plug in x value (x = 5)

3(5) + 2 = ?

solve

15 + 2 = ?

answer

17 = ?

5 0
3 years ago
Read 2 more answers
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