answer.
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
denpristay
3 months ago
12

selma is now 3 times older than joyce . four years ago , selma was 4 times as old as joyce was then . find their present ages

Mathematics
1 answer:
tester [12.3K]3 months ago
8 0

Let Selma's current age be s

Let Joyce's current age be j

Selma is three times as old as Joyce now

s=3j........(1)

Four years prior,

s-4=j-4

This means

Selma was four times Joyce's age

s-4=4(j-4)

s-4=4j-16

s=4j-16+4

s=4j-12.............(2)

Now substitute s in (2) using (1)

3j=4j-12

3j-4j=-12

-j=-12

Multiply by -1 on both sides

j=12

Now substitute j into (1)

s=3j

s=3(12)

s=36

Selma's current age = s = 36 years old

Joyce's current age = j = 12 years old

You might be interested in
What is the factored form of a2 – 121?
AnnZ [12381]

Response:

The factored expression a^2-121 is (a+11)(a-11).

Detailed explanation:

Provided: a^2-121

Our goal is to express the given equation in a factored form.

Factoring pertains to rewriting an expression so that the product of its factors yields the original expression

Let’s consider the expression a^2-121.

We recognize the algebraic identity x^2-y^2=(x+y)(x-y)

Thus, we have a^2-121=a^2-(11)^2.

Matching with the above identity, we assign x= a, and b = 11, leading to

a^2-(11)^2=(a+11)(a-11).

Consequently, the factored expression a^2-121 is (a+11)(a-11).

7 0
1 month ago
Jonathan has 3/4 pound of grapes.how many 1/8pound servings can Jonathan make from his grapes
Inessa [12570]

Response:

6 servings.

Detailed explanation:

To determine this, divide 3/4 by 1/8, here are the steps:

3/4 divided by 1/8

3/4 times 8/1

(3 × 8 = 24); (4 × 1 = 4)

24 divided by 4 results in 6.

I hope this assists! If possible, please grant me brainliest, as I need it to level up! Thank you.

5 0
2 months ago
The pizza shop offers a 15 percent discount for veterans and senior citizens. If the price of a pizza is $12, how would you find
Svet_ta [12734]
To calculate, simply multiply 12 by 0.15 or 15%, which equals 1.8. Then subtract 1.8 from 12, yielding $10.20 as the discounted price for the pizza.

I hope this is helpful


8 0
3 months ago
Read 3 more answers
There are 11 portable mini suites (a.k.a. cages) in a row at the Paws and Claws Holiday Pet Resort. They are neatly labeled with
AnnZ [12381]

Step-by-step explanation:

a) 7!

In absence of any restrictions, the answer is 7! as it represents the permutations of all animals.

b) 4! x 3!

Considering there are 6 cats and 5 dogs, the first and last slots must be occupied by cats to ensure alternate arrangements. The only options available then are based on the arrangement of the cats among themselves and the dogs among themselves, yielding 4! permutations for the cats and 3! for the dogs, thus leading to a total of 4! x 3! arrangements.

c) 3! x 5!

Here, the arrangement of the dogs among themselves can occur in 3! ways. Considering the dogs as a singular “object,” we can arrange this unit with the 4 cats, providing 5! total arrangements possible, leading to 3! · 5! arrangement possibilities.

d) 2 x 4! x 3!

In this scenario, both cats and dogs must be grouped together, allowing positions where all cats come before the dogs or vice versa. As there are two configurations, the resultant count is 2 multiplied by both arrangements, resulting in 2 x 4! x 3!

3 0
2 months ago
Calvin deposits $400 in a savings account that accrues 5% interest compounded monthly. after c years, calvin has $658.80. makayl
lawyer [12517]
To calculate this, a specific formula will be necessary. Years = log (total/principal) / [n * log (1 + rate / n)]. Part A) For Calvin: $400 at 5% monthly results in $658.80; Time =? Monthly compounding, n = 12. Thus, Years = log(658.80/400) / [12 * log(1+ (.05/12))]. Subsequently, Years = log( 1.647) / (12 * log(1.0041666667)). Then, Years = 0.21669359917 / 12 * 0.0018058008777. Thus resulting in Years = 0.21669359917 / 0.0216696105. Ultimately, Years ≈ 9.999884362. Part B) For Makayla: $300 at 6% quarterly yields $613.04; Time=? Quarterly compounding, n = 4. Therefore, Years = log(613.04/300) / [4 * log (1 +.06/4)]. This results in Years = log(2.0434666667) / (4 * log(1.015)). Years thus equals 0.31036755784 / (4 * 0.0064660422492), resulting in Years ≈ 11.9999044949. The approximate difference is about 3 years.
3 0
2 months ago
Read 2 more answers
Other questions:
  • If T is the midpoint of SU,find x. ( ST=8x+11 and TU= 12x-1)
    5·2 answers
  • Horizontal plane A and vertical plane B intersect at a line. Line n is vertical on plane B and forms a right angle with horizont
    10·2 answers
  • What is the solution to –4(8 – 3x) ≥ 6x – 8?
    10·2 answers
  • A child rides a pony on a circular track whose radius is 5.25 m. a) Find the distance traveled and the displacement after the ch
    8·1 answer
  • In the diagram, point O is the center of the circle and AC¯¯¯¯¯ and BD¯¯¯¯¯ intersect at point E. If m∠AOB = 90° and
    12·2 answers
  • Assuming two hikers begin at a trail start, which scenarios must be true based on the table? Check all that apply.
    5·2 answers
  • The given equation has been solved in the table. In which step was the subtraction property of equality applied?
    7·1 answer
  • Jada and Noah wanted to find the total volume of a cube and a rectangular prism. They know the prism's volume is 20 cubic units,
    9·1 answer
  • CyberCafe charges a computer station rental fee of $5 plus $0.20 for each quarter hour spent surfing. Which expression represent
    14·1 answer
  • Which polynomial function could be represented by the graph below?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!