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Anika [276]
3 years ago
8

Evaluate 5(x - 1) - 2 when x = 3. ОА. 12 ОВ. -4 Ос. о. O D. 8

Mathematics
2 answers:
Harlamova29_29 [7]3 years ago
7 0

Answer:

8

Step-by-step explanation:

5(3-1)-2

5(2)-2

10-2

8

olya-2409 [2.1K]3 years ago
3 0

Answer:

D:  8

Step-by-step explanation:

Starting with 5(x - 1) - 2, replace x with 3:

                     5(3 - 1) - 2, or 5(2) - 2, or 10 - 2, or 8.  This matches Answer D.

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kupik [55]

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3 years ago
Choose the expression that best represents the phrase below.
Alex787 [66]

Answer:

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6 0
3 years ago
Find the area of a circle with a radius of 8\color{purple}{8}8start color purple, 8, end color purple.
jeka94
To find an area we use this equation: 

a = r² · π
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8 0
4 years ago
Sets A and B are independent events and are mutually exclusive
Lynna [10]

The solutions are {P}({A} \text { and }B})=0 and P}({A} \text { or } {B})=\frac{7}{12}

Explanation:

Given that the sets A and B are independent events and are mutually exclusive events.

We need to determine the value of P(A \text { and } B) and P(A \text { or } B)

<u>The value of </u>P(A \text { and } B)<u>:</u>

Since, the sets A and B are mutually exclusive events, it is impossible for the two events to occur together.

Hence, we have,

{P}({A} \text { and }B})=0

Thus, the value of P(A \text { and } B) is 0.

<u>The value of </u>P(A \text { or } B)<u>:</u>

For mutually exclusive events, the value of P(A \text { or } B) is given by the formula,

P(A \text { or } B)=P(A)+P(B)

Substituting the values, we get,

P(A \text { or } B)=\frac{1}{4}+\frac{1}{3}

P}({A} \text { or } {B})=\frac{7}{12}

Hence, the value of P(A \text { or } B) is \frac{7}{12}

Thus, the solutions are {P}({A} \text { and }B})=0 and P}({A} \text { or } {B})=\frac{7}{12}

8 0
4 years ago
a science class have five girls and three boys in 7th grade at two girls and two boys in the 8th grade the teacher randomly sele
Elena-2011 [213]

Answer:

Possibility that the students  selected are both girls = 31.25%


Step-by-step explanation:

It is given that


A science class have 5 girls and 3 boys in 7th grade  

And 2 girls and 2 boys in the 8th grade

In 7th grade total students = 8

In 8th grade total students = 4

Total possibilities = 8 x 4 = 32

The teacher randomly selects a 7th grade and an 8th grade


The number ways a girl selected from 7th grade = 5c1 = 5


The number ways a girl selected from 8th grade = 2c1 = 2


Total possibilities = 5 x 2 = 10

Probability that the students  selected are both girls =10 /32 = 31.25%

6 0
4 years ago
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