2 years ago

5. In a class of 18 students, 2/3 of them speak two languages. How many speak two languages?

Mathematics

1 answer:

Alona [7]2 years ago

4 0

Answer: 12

Step-by-step explanation:

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Two-third a number plus 4 is 7

Harman [31]

Answer:

2/3x+4=7

x=4.5

Step-by-step explanation:

2/3x+4=7

-4 -4

2/3x=3 (multiply by 3/2)

multiply both side by the reciprocal

x=4.5

7 0

3 years ago

Can you help and tell me how you got the answer

geniusboy [140]

Y= -2X
Y= -2•3
Y= -6
X=3

Y= -2X
Y= -2•(-3)
Y=6
X= -3

Answer is y= -2X

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2 years ago

A teacher summarizes grades on an exam by,Min = 26, Q1 = 67, Q2 = 80, Q3 = 87, Max = 100, Mean = 76, Mode = 100, Standard deviat

chubhunter [2.5K]

we have

Min=26

Q1=67

Q2=80

Q3=87

Max=100

Mean=76

Mode=100

standard deviation=76

IQR=20

In this problem

the mean is equal to the standard deviation

therefore

<h2>The standard deviation is incorrectly</h2>

5 0

7 months ago

What is the value of f(x)=2•2^x for f(-2)

Zigmanuir [339]

Answer:

The value of f(-2) is 1/2 or it can be written as 0.5.

Step-by-step explanation:

The given function is

$f(x)=2\cdot 2^x$

We have to find the value of f(-2).

Substitute x=-2 in the given function to find the value of f(-2).

$f(-2)=2\cdot 2^(-2)$

$f(-2)=2\cdot \frac{1}{2^(2)}$

$f(-2)=\frac{1}{2}$

$f(-2)=0.5$

Therefore the value of f(-2) is 1/2 or it can be written as 0.5.

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2 years ago

Help pls!! Find the area

Dima020 [189]

Answer:

17.5 for perpendicular triangle

Step-by-step explanation:

A= 1/2 ( b*h )

A= 1/2 ( 7*5)

A= 1/2 ( 35)

A= 17.5

8 0

2 years ago