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2 years ago

D =

Mathematics

1 answer:

BigorU [14]2 years ago

6 0

Answer:

This is a function. Range is y is an element of all real numbers, or {yer} and domain is x is greater than or equal to -4, xer {x>=-4|xer}

Step-by-step explanation:

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What is the answer<br>2x+3x-7=42

Studentka2010 [4]

Answer:

x = $\frac{49}{5}$ or $9.8$

Step-by-step explanation:

First, combine like terms. Like terms are terms with the same amount of the same variable.

(2x + 3x) - 7 = 42

5x - 7 = 42

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS. PEMDAS is the order of operations, and stands for:

Parenthesis

Exponents (& roots)

Multiplications

Divisions

Additions

Subtractions

First, add 7 to both sides of the equation:

5x - 7 (+ 7) = 42 (+ 7)

5x = 42 + 7

5x = 49

Next, divide 5 from both sides of the equation:

(5x)/5 = (49)/5

x = 49/5

x = 9.8

7 0

2 years ago

Read 2 more answers

A class consists of 12 boys and 12 girls. The teacher picks five students to present their work to the rest of the class

Varvara68 [4.7K]

Answer:

0.01863, yes preference

Step-by-step explanation:

given that a class consists of 12 boys and 12 girls. The teacher picks five students to present their work to the rest of the class and says that the five students are being selected at random

Here selecting any 5 students from the group of total 24 students is combination because order does not matter.

Total no of ways of selecting any 5 from total 24 = $24C5\\=42504$

No of ways of selecting only 5 girls = No of ways of selecting random 5 girls from total 12 girls

= $12C5\\=792$

a) the probability be that all five students

selected are girls= $\frac{792}{42504} \\=0.01863$

b) Since the probability for selecting all girls is very small and near to 0, it is unusual to select all girls if done at random. Hence the teacher had a preference for girls.

5 0

3 years ago

A boat leaves a port and heads straight East for 12 miles then turns straight south for another 7 miles then stops. If another b

dlinn [17]

Answer:

Step-by-step explanation: