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3 years ago

Write the inequality for x that is shown on this line. Can you answer these 3 questions:

Mathematics

2 answers:

Irina18 [472]3 years ago

8 0

Answer:

1. Less than 3

2. 3, 4, 5 and 6

3. x > 6

Step-by-step explanation:

3. 3x + 7 > x + 19

Treat the > like = when solving.

-x

2x + 7 > 19

-7

2x > 12

x > 6

dexar [7]3 years ago

3 0

Answer: a) x < 3

b) 3, 4, 5, 6

c) x > 6

Step-by-step explanation:

First you need to understand the symbols:

< means less than (represented by an open dot, left arrow)

≤ means less than or equal to (represented by a closed dot, left arrow)

> means greater than (represented by an open dot, right arrow)

≥ means greater than or equal to (represented by a closed dot, right arrow)

a) We have a closed dot and a left arrow so we need to use <

We write this inequality as: x < 3

b) y is BETWEEN 2 and 6 (not including 2 but including 6)

2 3 4 5 6

c) 3x + 7 > x + 19

2x + 7 > 19 subtracted x from both sides

2x > 12 subtracted 7 from both sides

x > 6 divided both sides by 2

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What should be the first step in adding these equations to eliminate y?

dybincka [34]

D. Multiply the top equation by 2

That way, 3y(2) - 6y = 6y - 6y = 0

hope this helps

8 0

3 years ago

Read 2 more answers

Please please help!!!!

Lisa [10]

15a^2 + 21a + 6= 330

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3 years ago

g The proportion of U.S. births that result in a birth defect is approximately 1/33 according to the Centers for Disease Control

Rudiy27

Answer:

0.1426 = 14.26% probability that at least one of the births results in a defect.

Step-by-step explanation:

For each birth, there are only two possible outcomes. Either it results in a defect, or it does not. The probability that a birth results in a defect is independent of any other birth. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

The proportion of U.S. births that result in a birth defect is approximately 1/33 according to the Centers for Disease Control and Prevention (CDC).

This means that $p = \frac{1}{33}$