What is the value of x?

Can I please get some help

Anika [276]

Answer:

a. 6.93 b. 5 c. 6.72 d. 3.46

Step-by-step explanation:

a. √4^2- 4(4)(-2)

Evaluate the power

√16-4×4(-2)

Multiply

√16-16(-2) = √16-(-32) = √16+32 Since 2 negatives equal a positive.

Add

√48

Find square root

√48= 6.92820323028-- rounded-- 6.93

b. √1^2-4(1)(-6)

Evaluate the power

√1-4(1)(-6)

Multiply

√1-(-24) = √1+24 Since 2 negatives equal a positive.

Add

√25

Find the square root

√25=5

c. √1^2-4(1)(-11)

Evaluate the power

√1-4(1)(-11)

Multiply

√1-(-44) = √1+44 Since 2 negative equal a positive.

Add

√45

Find the square root

√45= 6.7082039325-- rounded-- 6.72

d. √6^2-4(3)(2)

Evaluate the power

√36-4(3)(2)

Multiply

√36-24

Subtract

√12

Find the square root

√12= 3.46410161514-- rounded-- 3.46

3 0

4 years ago

The waiting times between a subway departure schedule and the arrival of a passenger are uniformly distributed between 0 and 5 m

Grace [21]

Answer:

0.35

Step-by-step explanation:

we know that

The formula to use for uniform distribution is equal to

$P( X < x) = \frac{x-a}{b-a}$

where,

b is the upper limit of the distribution which is 5 minutes in this case.

a is the lower limit of the distribution which is 0 minutes in this case.

x is the concerned value which is 1.75 minutes in this case.

substitute the given values

$P( X< 1.75) = \frac{1.75-0}{5-0}=0.35$

That means

The probability that a randomly selected passenger has a waiting time less than 1.75 minutes is 0.35

5 0

3 years ago

Garth estimated the height of the door to his classroom in meters .What is a reasonable estimate?

natulia [17]

The height of a door will be around 6 feet and 8 inches, so about 7 feet. You will need to convert this to meters. To do this, you should first know that 1 meter = 3.28 feet. Now, divide 7 by 3.28:

7/3.28 = 2.134

So, a reasonable estimate would be 2 meters.

4 0

4 years ago

Read 2 more answers

Simplify this math problem show Your work

loris [4]

9514 1404 393

Answer:

(p -9q)/(4p² +12pq)

Step-by-step explanation:

The least common denominator will be the product of the denominators.

$\dfrac{-3}{4p}+\dfrac{1}{p+3q}=\dfrac{-3(p+3q)+1(4p)}{(4p)(p+3q)}=\boxed{\dfrac{p-9q}{4p^2+12pq}}$