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Lynna [10]
3 years ago
12

I dont understand this

Mathematics
2 answers:
Reil [10]3 years ago
5 0
U basically solve: (4sqrt8)*2 + (5 sqrt 12 + 6 sqrt 20)*2
Natali [406]3 years ago
3 0
4... because 2+2 8/4 5/12. 6/20
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7.
Serjik [45]

Answer:

Probability that a customer pays the bill by mail, given that the customer is female is 0.20.

Step-by-step explanation:

The complete question is:

                               Online                             By Mail            Total

             Male             12                                      8                   20

           Female           24                                     6                   30      

             Total             36                                     14                  50    

A utility company asked 50 of its customers whether they pay their bills online or by mail. What is the probability that a customer pays the bill by mail, given that the customer is female.

Probability that a customer pays the bill by mail, given that the customer is female is given by = P(Pays bill by mail / Customer is female)

\frac{6}{50}P(Pays bill by mail/Customer is female) = \frac{P(\text{Pays bill by Mail}\bigcap \text{ Customer is Female})}{P(\text{ Customer is Female})}

Now, Probability that customer is female =  \frac{30}{50}

Also, Probability that customer pays bill by mail and is female =   \frac{6}{50}

So, Required probability =  \frac{\frac{6}{50} }{\frac{30}{50} }

                                         =  \frac{6}{50}\times \frac{50}{30}

                                         =  \frac{1}{5}   =  0.20

Hence, probability that a customer pays the bill by mail, given that the customer is female is 0.20.

6 0
3 years ago
What is the range of the function
alexandr1967 [171]

Answer: Choice B

Range = {-3, 1, 5}

============================================

Explanation:

The domain is the set of all possible input x values. The range is the set of all possible y outputs.

Plug in each x value from the domain, one at a time, to get its corresponding range y value.

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

Start with x = -3

f(x) = 2x+3

f(-3) = 2(-3)+3

f(-3) = -6+3

f(-3) = -3

So -3 is in the range.

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

Move onto x = -1

f(x) = 2x+3

f(-1) = 2(-1)+3

f(-1) = -2+3

f(-1) = 1

1 is also in the range

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

Finally plug in x = 1

f(x) = 2x+3

f(1) = 2(1)+3

f(1) = 2+3

f(1) = 5

The value 5 is the final value in the range.

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

All of those values form the set {-3, 1, 5} which is the complete range.

7 0
3 years ago
21 first-graders and 54 other students attended a school assembly. What percentage of the students at the assembly were first-gr
Degger [83]
21+ 54= 76

21/76= 27.6%

5 0
3 years ago
WILL GIVE BRAINLIEST FOR A CORRECT ANSWER:
guapka [62]

Answer:

Solution:

the boat's speed in still water: x

The speed with current: (x+3)

The speed against current: (x-3)

The equation is

3(x+3) = 4(x-3)

x = 21 mph

The distance = 3*(21+3)= 72 miles

I  choose (A)

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
If a/b = c/d, then ad = bc.
Nikolay [14]

Answer:

The statement is true

see the explanation

Step-by-step explanation:

we have the proportion

\frac{a}{b}=\frac{c}{d}

we know that

To solve the proportion multiply in cross

so

(a)(d)=(b)(c)

ad=bc

therefore

The statement is true

7 0
3 years ago
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