All categories

3 years ago

How does one do this problem?

Mathematics

1 answer:

Alex Ar [27]3 years ago

7 0

X = SQRT( 4 * (12+4))
x - sqrt( 4 * 16)
x = sqrt(20)
x = 2 sqrt(5)

You might be interested in

Which expression shows you how you can use mental math to simplify the expression 9×15×2 most easily?

tatuchka [14]

$(9)(15)(2)$

3 0

3 years ago

Directions: Solve these equations by using addition. You will need to use your fraction and decimal skills to solve these

Marina CMI [18]

One simple way to approach this is to subtract the number that DOESN’T have the variable with the solution by the sum.
Lets use problem 1 as the example:
1.) N+8=13
In this case, we subtract 13 by 8 and get 5, therefore N= 5.

2.) B+17=62
62-17= 45
B= 45

3.) X+5/6= 7/16
7/16-5/6= -19/48
X= -19/48

4.) y+1/7=5/8
5/8-1/7= 27/56
Y= 27/56

5.) 14+y=69
69-14=55
Y=55

6.) c+3.6=4.9
4.9-3.6=1.3
C= 1.3

Now for the word problems:
Lets use 7 as the example-
7.) a number increased by 19 is equal to 221.
Since we don’t know the number being increased by 19, that will be our variable. It will be re-written as so:

N + 19 = 221

Where N is the unknown number.

Using the same method of subtracting by the sum and the number that’s not the variable, we’ll get the solution to N
221-19= 202
N= 202

8.) N + 1 2/3 = 8
8 - 1 2/3 = 19/3= 6 1/3
N= 6 1/3

I really hope this helps

6 0

3 years ago

The quotient of n and -0.5 is 13. What is the value of n? Your answer: -26 -6.5 6.5 26

Zanzabum

Answer:

n = -6.5

Step-by-step explanation:

n / -.5 = 13

Multiply each side by -.5

n / -.5 * -.5 = 13 * -.5

n = -6.5

5 0

4 years ago

Read 2 more answers

How do you prove that a point on a perpendicular bisector is equidistant from the endpoints of the segment it intersects?

konstantin123 [22]

Check the picture drawn

Consider the line segment AB,

let M be the midpoint of AB, so AM=MA

erect the perpendicular MT to AB from point M. Pick a point P on MT and join it to the points A and B

The triangles PMA and PMB are congruent from the Side Angle Side congruence postulate:

AM=MA, PM is common and m(PMA)=m(PMB)=90°, as MT is perpendicular to AB

so PA=PB

5 0

3 years ago

A hotel chain recently surveyed 300 new customers and asked them to rate their overall satisfaction with their recent hotel stay

Nookie1986 [14]

Answer: 200

Step-by-step explanation:

Given : A hotel chain recently surveyed 300 new customers and asked them to rate their overall satisfaction with their recent hotel stay.

The survey estimated a mean satisfaction $\mu=7$ with a standard deviation $\sigma=1$ .

Let x represents the rating given by customer.

Using formula , $z=\dfrac{x-\mu}{\sigma}$ .

For x = 6, z= -1

For x= 8 , z=1

The probability that new customers gave the hotel a rating of 6,7, or 8 will be :-

$P(6\leq x\leq8)=P(-1\leq z\leq1)=P(z\leq1)-P(z\leq-1)\\\\=P(z\leq1)-(1-P(z\leq1))\\\\=2P(z\leq1)-1\\\\=2(0.8413447)-1=0.6826894\approx0.68$

The number of new customers gave the hotel a rating of 6,7, or 8 will be :-

$0.68\times300=204\approx200$ [Rounded to the nearest tens]

Hence, the approximate number of new customers gave the hotel a rating of 6,7, or 8 =200

3 0

3 years ago