1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AlexFokin [52]
3 years ago
6

The sum of Joy's age and her brother's age is 24. Joy's brother's age is 3 years older than twice joy's age. What is the differe

nce between their ages?
Mathematics
1 answer:
enyata [817]3 years ago
3 0
Let Joy be x years old

<span>Joy's brother's age is 3 years older than twice joy's age.
</span>Joy's Brother = 2x + 3

<span>The sum of Joy's age and her brother's age is 24.
x + 2x + 3 = 24
3x + 3 = 24
3x = 24 - 3
3x = 21
x = 21 </span>÷ 3 
x = 7

Joy:
x = 7

Brother:
2x + 3 = 2(7) + 3 = 17

Difference in their age = 17 - 7 = 10 years

They are 10 years apart.
You might be interested in
What minus 10 is equal to 296?​
Varvara68 [4.7K]

Answer:

306

Step-by-step explanation:

306 - 10 = 296

5 0
2 years ago
Determine whether the following statement regarding the hypothesistest for two population proportions is true or false.
murzikaleks [220]

Answer:

False

Step-by-step explanation:

Let p1 be the population proportion for the first population

and p2 be the population proportion for the second population

Then

H_{0} p1  = p2

H_{a} p1 ≠ p2

Test statistic can be found usin the equation:

z=\frac{p1-p2}{\sqrt{{p*(1-p)*(\frac{1}{n1} +\frac{1}{n2}) }}} where

  • p1 is the sample population proportion for the first population
  • p2 is the sample population proportion for the second population
  • p is the pool proportion of p1 and p2
  • n1 is the sample size of the first population
  • n2 is the sample size of the second population.

As |p1-p2| gets smaller, the value of the <em>test statistic</em> gets smaller. Thus the probability of its being extreme gets smaller. This means its p-value gets higher.

As the<em> p-value</em> gets higher, the null hypothesis is less likely be rejected.

7 0
3 years ago
Each week, Christian earns $x fixing bicycles and receives $10 as his allowance. To find how much he will earn in total over 2 w
pashok25 [27]
The answer is B.
If he earns $x in one week, then you need 2x to calcualte 2 weeks, add that with his allowance and there you have it.
8 0
3 years ago
Read 2 more answers
-4(-2z + 2) = 6z + 8
Savatey [412]
8z-8=6z+8
8x-6z=8+8
2z=16
Z=8
8 0
3 years ago
Read 2 more answers
PLZ HELP!!! I need help ASAP
hammer [34]
You distribute the negative in the second equation
4 0
3 years ago
Read 2 more answers
Other questions:
  • A seagull is gliding 53 feet above the surfaces of the water. It then dives 70 feet to catch a fish. How many feet below the sur
    5·1 answer
  • I need help pleaseeeee
    9·1 answer
  • Mary needs to buy 44 cookies for her party. If 6 cookies come in a package, how many packages of cookies does she buy?
    6·2 answers
  • Determine the intercepts of the line.<br> x-intercept:<br> y-intercept:
    9·1 answer
  • At Ever Lake it costs $12 per hour to rent a canoe. Jared aand his friends rented a canoe for 4 hours and paid $68. Write an equ
    7·1 answer
  • I need help with this assignment
    12·1 answer
  • At a football stadium, 20% of the fans in attendance were teenagers. If there were 290 teenagers at the football stadium, what w
    7·2 answers
  • A zoo has 65 birds now. It adopted 17 new birds last week. How many birds did the zoo have before it adopted the new birds? Writ
    13·1 answer
  • Can someone help me pls
    9·2 answers
  • Find the surface area of a cylinder with radius 2 yards and height 6 yards.<br> Give me the answer
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!