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3 years ago

The solution to -3x + 5x - 7 = -11 is _____.

Mathematics

1 answer:

Lemur [1.5K]3 years ago

6 0

Answer:

x = -2

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

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What is the value of x in the equation 4(2x + 10) = 0? -5 -7 5 7

Contact [7]

Answer:

Step-by-step explanation:

4(2x+10)=0

8x+40=0

-40 -40

8x=-40

x=-5

6 0

3 years ago

Read 2 more answers

Whats the area ?????

SOVA2 [1]

You would add up the length of all sides to get the area.

6 0

3 years ago

Write the ordered pairs that represent henry and the library

Rus_ich [418]

Answer:

That's a horrible pic!

Step-by-step explanation:

3 0

3 years ago

Please Help ASAP :- Events A and B are given to be independent. If P(A) = 0.2, P(AUB) = 0.6, Find P(B).

timurjin [86]

Answer:

0.4

Step-by-step explanation:

P(A)+P(B)=P(AUB)

8 0

3 years ago

The reading speed of sixth-grade students is approximately normal, with a mean speed of 125 words per minute and a standard devi

Lisa [10]

Answer:

Part A

μ of the reading speed of sixth-grade students = 125 words

σ of the reading speed of sixth-grade students = 24 words

Part B

The probability that a randomly selected sixth-grade student reads less than 100 words per minute is 14.92%

Part C

The probability that a randomly selected sixth-grade student reads more than 140 words per minute is 26.43%

Step-by-step explanation:

Part A:

μ of the reading speed of sixth-grade students = 125 words

σ of the reading speed of sixth-grade students = 24 words

Part B:

1. Let's find the z-score for a randomly selected sixth-grade student that reads less than 100 words per minute:

z-score = (100 - 125)/24

z-score = -25/24

z-score = -1.04

2. Now, let's find out the probability that a randomly selected sixth-grade student that reads less than 100 words per minute, using the z-table:

P (-1.04) = 0.1492

This means that the probability that a randomly selected sixth-grade student that reads less than 100 words per minute is 14.92%

Part C.

1. Let's find the z-score for a randomly selected sixth-grade student that reads more than 140 words per minute:

z-score = (140 - 125)/24

z-score = 15/24

z-score = 0.63

2. Now, let's find out the probability that a randomly selected sixth-grade student that reads more than 140 words per minute, using the z-table:

P (0.63) = 0.7357

But we're being asked for a randomly selected student that reads more than 140 words, then:

1 - P(0.63) = 1 - 0.7357 = 0.2643

This means that the probability that a randomly selected sixth-grade student that reads more than 140 words per minute is 26.43%

8 0

4 years ago