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Vikentia [17]
3 years ago
12

What is 2a squared if a=3?

Mathematics
2 answers:
borishaifa [10]3 years ago
7 0
2(3)^2= 18 that is with a(3) squared or 2(3)=6 and 6squared or 6^2 = 36.
Fittoniya [83]3 years ago
7 0
If You mean is :
2a^{2}~~~~~~[just\ subtituted\ a\ into\ 3]

2a^{2}\\=2(3)^{2}\\=2(3 \times 3)\\=2(9)\\=18
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Find the average rate of change for fx) = x2 – 3x – 10 from x = 4 to x = 6.
Leviafan [203]

Answer:

7

Step-by-step explanation:

The rate of change is defined as

f(x2) - f(x1)

--------------------

x2-x1

x2 = 6

f(6) = x^2 – 3x – 10 = 6^2 -3*6 -10 = 36 - 18-10=8

x1 = 4

f(4) = x^2 – 3x – 10 = 4^2 -3*4 -10 = 16 - 12-10=-6

Substitute the values into the expression

8 -  -6

--------------------

6-4

8+6

------------

2

14/2= 7

6 0
3 years ago
Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 33 minutes and a standard
lilavasa [31]

Answer:

Method A.

Step-by-step explanation:

For solving this question we need to find out the z-scores for both methods,

Since, the z-score formula is,

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

Where, \mu is mean,

\sigma is standard deviation,

Given,

For method A,

\mu = 33

\sigma=8

Thus, the z score for 34 is,

z_1=\frac{34-33}{8}=0.125

While, for method B,

\mu = 37

\sigma = 4

Thus, the z score for 34 is,

z_2=\frac{34-37}{4}=-0.75,

Since, z_1 > z_2

Hence, method A is preferred if the procedure must be completed within 34 minutes.

8 0
4 years ago
Find the greatest common factor of the terms in the following expression: 8m + 18mn.
DanielleElmas [232]

Answer:

The greatest common factor is 2m

3 0
3 years ago
Read 2 more answers
Please help me!! I'm not good at math ✌
Bezzdna [24]
I believe these are the answers.
A
i) (y=5) x=6
ii) (y = -1) x=0
iii) (y = -2) x = -1
B
i) (x = -4) y = -5
ii) (x=2) y=1
iii) (x=5) y=4
Sorry if these are wrong but I hope the help.

6 0
3 years ago
Solve for x.<br> 9 km<br> 12 km<br> X
Mandarinka [93]

Answer:

15km

Step-by-step explanation:

\rm \mapsto \:  {9}^{2}  +  {12}^{2}  =  {x}^{2}  \\  \rm \mapsto \:  {x}^{2}  = 81 + 144 \\  \rm \mapsto \:  {x }^{2}  = 225 \\  \rm \mapsto \: x =  \sqrt{225}  \\  \rm \mapsto \: x = 15

7 0
3 years ago
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