Ask question

Ask question

All categories

3 years ago

12

Carlos is five years older than twice his sister's age. Carlos is 13. Which equation and solution correctly identifies his siste

r's age?
2x - 5 = 13; x = 9
2x + 5 = 13; x = 4
2x - 5 = 13; x = 4
2x + 5 = 13; x = 9

1 answer:

AVprozaik [17]3 years ago

4 0

Answer:

B

Step-by-step explanation:

x=4 so

2x4=8

8+5=13

Carlos's sister is 4 years old, therefore it is B.

You might be interested in

Simplify the expression 4(x+y) + 3y

Anuta_ua [19.1K]

Answer:

4x + 7y

Step-by-step explanation:

4(x+y) + 3y

Distribute

4x+ 4y+ 3y

add like terms

4x + 7y

6 0

4 years ago

HOW WILL YOU DEAL WITH YOUR NEGATIVE ATTITUDES? ???

fiasKO [112]

Answer:

I usually try and practice changing my mindset. Just try to look at things from another perspective, and if you can't, try thinking the OPPOSITE of what you thought.

Think homework is hard? Say to yourself, "Homework is easy." and trudge on through. After some time, your mindset *will* improve, and your attitudes will change from negative to positive.

Also, try to go out more often. Doing exercise, socializing, all of which will produce serotonin and will improve your outlook on life and attitude.

Step-by-step explanation:

Thanks, and please give me Brainliest!

3 0

3 years ago

Suppose B is a proper subset of C,

Tomtit [17]

Answer:

Maximum: 7

Minimum: 0

Step-by-step explanation:

A proper subset B of a set C, denoted $B\subset C$ , is a subset that is strictly contained in C and so necessarily excludes at least one member of C.

This means that the number of elements in B must be at least 1 less than the number of elements in C. If the number of elements in C is 8, then the maximum number of elements in B can be 7.

The empty set is a proper subset of any nonempty set. Hence, the minimum number of elements in B can be 0.

3 0

3 years ago

The standard deviation of the sampling distribution of the sample mean is $115,000. The population standard deviation was $25,00

Zina [86]

Answer:

0.31084

Step-by-step explanation:

When given a question where by a random sample is chosen for the population, the z score formula used =

z = (x-μ)/Standard error

where x is the raw score

μ is the population mean

Standard error = σ/√n,

σ is the population standard deviation

n = number of samples

For x = $114,000, μ = $115,000, σ = 25,000, n = 100

z = (x-μ)/Standard error

= z = (x-μ)/ σ/√n

z = 114,000 - 115,000/ 25,000/√100

= -1000/25,000/10

= -1000/2500

z = -0.4

Determining the probability value from Z-Table:

P(x = 114000) = P(z = -0.4)

= 0.34458

For x = $116,000, μ = $115,000, σ = 25,000, n = 100

z = (x-μ)/Standard error

= z = (x-μ)/ σ/√n

z = 116,000 - 115,000/ 25,000/√100

= 1000/25,000/10

= 1000/2500

= 0.4

Determining the Probability value from Z-Table:

P(x = 116000) = P(z = 0.4)

= 0.65542

The probability that the sample mean selling price was between $114,000 and $116,000 is calculated as

= P(114,000< x < 116,000)

= P(-Z<x<Z)

= P(-0.4<x< 0.4

= 0.65542 - 0.34458

= 0.31084

Therefore, the probability that the sample mean selling price was between $114,000 and $116,000 is 0.31084

5 0

3 years ago

6.5 x 1/9 please help

hjlf

Answer:

13/18

Step-by-step explanation:

6.5 · 1/9 = 6 5/10 · 1/9
6 5/10 · 1/9 = 6 1/2 · 1/9
6 1/2 · 1/9 = 13/2 · 1/9
13/2 · 1/9 = 13/18

Therefore, 6.5 · 1/9 = 13/18.

7 0

3 years ago