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3 years ago

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:

Step-by-step explanation:

5(3-1)-2

5(2)-2

10-2

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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3 years ago

Choose the expression that best represents the phrase below.

Alex787 [66]

Answer:

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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

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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 $P(A \text { or } B)$

The value of $P(A \text { and } B)$ :

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.

The value of $P(A \text { or } B)$ :

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