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
andreev551 [17]
4 years ago
5

Janet has three coins.

Mathematics
1 answer:
tatyana61 [14]4 years ago
8 0

Answer:

Janet has coins worth 252.5, 101, and 50.5.

Step-by-step explanation:

Let us call the three coins a,b, and c.

The first coin a is 5 times another coin<em> (let's say </em>b); therefore,

a = 5b,

and the third coin is 2 times the value of another coin<em> (it's coin </em>b<em>):</em>

<em />c =2b<em>.</em>

The total worth of all coins is 404; therefore,

a+b+c =404

or

5b+b+2b =404

8b =404

\boxed{b = 50.5}

with the value of b in hand, we find a and c:

a = 5b = 5(50.5)

\boxed{a = 252.5}

and for c:

c = 2 b = 2 (50.5)

\boxed{c = 101}

Thus, Janet has 3 coins worth 252.5, 101, and 50.5.

You might be interested in
1) -24, -4, 16, 36, ...<br> Find a23
viktelen [127]

We're given the Arithmetic Progression <em>-24, -4, 16, 36 ...</em> .

We know that a term in an AP is generally represented as:

\bf a_n\ =\ a\ +\ (n\ -\ 1)d

where,

  • a = the first term in the sequence
  • n = the number of the term/number of terms
  • d = difference between two terms

We need to find \sf a_2_3.

From the given progression, we have:

  • a = -24
  • n = 23
  • d = (-24 - (-4) = -20

Using these in the formula,

\sf a_2_3\ =\ a\ +\ (n\ -\ 1)d\\\\\\a_2_3\ =\ -24\ +\ (23\ -\ 1)\ \times\ (-20)\\\\\\a_2_3\ =\ -24\ +\ 22\ \times (-20)\\\\\\a_2_3\ =\ -24\ -\ 440\\\\\\\bf a_2_3\ =\ -464

Therefore, the 23rd term in the AP is -464.

Hope it helps. :)

7 0
3 years ago
What is the equation of the line that passes through the point (4,3) and has a slope<br> of 1?
monitta

Answer:

1/2

Step-by-step explanation:

y=mx+b

3=m(4)+1

2=4m

1/2=m

5 0
4 years ago
A teacher wanted to prevent students from guessing answers on a multiple-choice test. The teacher graded 5 points for a correct
ZanzabumX [31]

Answer:

While slavery was the major issue separating the North and South, it was not slavery itself that sparked the conflict. The South wanted to secede from the Union, and the North refused. While President Abraham Lincoln personally opposed slavery, he recognized that it was legal under the U.S. Constitution at the time. He also recognized that few in the North were ready to go to war to free the slaves. For Lincoln and the northern majority, preservation of the Union was the foremost goal.

5 0
3 years ago
Read 2 more answers
Which assumption(s) must be used to prove that vertical angles are congruent?
ivanzaharov [21]

Answer:

The assumption to prove that vertical angles are congruent is "Vertical angles are always congruent".

Step-by-step explanation:

Vertical angles are a pair of angles (not adjacent) opposite each other by a vertex when two lines intersect.

When two lines intercept at a point, 4 angles are formed. Those that are opposite to each other and are not adjacent are vertical angles, these are always congruent.

In this case, we can affirm that if two angles are opposed by the vertex, they are equal.

Have a nice day!

5 0
3 years ago
HELP PLS A medical team has found that the blood concentration of a particular medicine has a decay rate of 40% in 24 hours. How
Natalija [7]

Answer: 360 mg of the medicine will be detected after 48 hours

Step-by-step explanation:

We would apply the formula for exponential decay which is expressed as

A = P(1 - r)^t

Where

P represents the initial dosage of the medicine.

A represents the final dosage of the medicine after t hours.

t represents the number of hours.

r represents the rate of decay

From the information given

P = 1000 mg

r = 40% = 40/100 = 0.4

The expression becomes

A = 1000(1 - 0.4)^t

A = 1000(0.6)^t

In 48 hours, t = 2

Therefore,

A = 1000(0.6)^2

A = 360

5 0
3 years ago
Other questions:
  • HEEEEEEEEEEELP <br> PLEEEEEEEEEASE
    13·1 answer
  • Consider that the length of rectangle A is 10 cm and its width is 6 cm. Which rectangle is similar to rectangle A? A) A rectangl
    9·2 answers
  • A had $360 more than B. When A spent $144 and B spent half of his money, A had 6 times as much money as B, Find the ratio of the
    6·1 answer
  • Find the sum of he first term in the series 3/2 + 1 + 1/2
    10·2 answers
  • Melissa is helping her dad build a walkway in their backyard. The walkway will be 54 feet long and 1.5 by 1.5 feet wide. The loc
    5·1 answer
  • Please Help Keep getting 6.4
    8·2 answers
  • Make the expression below a perfect square by adding in a constant value: x^2+14x+_
    12·1 answer
  • 10 points || answer ASAP if you can
    7·1 answer
  • For this exponential function,
    9·1 answer
  • X/6 + 4 = 15 what does x equal? What is x?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!