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
galina1969 [7]
3 years ago
6

Karen has $1.70 in coins. Karen has 8 coins, all of which are quarters or dimes.

Mathematics
1 answer:
Vilka [71]3 years ago
5 0

Answer:

Karen has 6 quarters and 2 dimes

Step-by-step explanation:

Let

x ----> the number of quarter coins Karen has

y ----> the number of dimes coins Karen has

Remember that

1\ quarter=\$0.25\\1\ dime=\$0.10

we know that

<em>Equation that represent the amount of coins Karen has</em>

x+y=8

isolate the variable y

y=8-x ----> equation A

<em>Equation that represent the value of coins Karen has</em>

0.25x+0.10y=1.70 ----> equation B

Solve the system of equations by substitution

substitute equation A in equation B

0.25x+0.10(8-x)=1.70

solve for x

0.25x+0.80-0.10x=1.70

0.25x-0.10x=1.70-0.80

0.15x=0.90

x=6

<em>Find the value of y</em>

y=8-x ----> y=8-6=2

therefore

Karen has 6 quarters and 2 dimes

You might be interested in
Madison buys supplies so she can make and sell wind chimes. She begins
Studentka2010 [4]
<h3>Explanation:</h3>

In the graph x-coordinate represents the number of wind chimes sold and y-coordinate represents the profit Madison earned. If a point is below the x-axis, means it has negative y-coordinate than it represents loss. Points above x-axis should have x-coordinate more than 6 as stated in the question that she started earning profit after selling her first 6 wind chimes. All the points having x-coordinate less than 6 should lie on or below the x-axis.

By the above statement point B is completely wrong. Point C and Point A are also wrong as they both x-coordinate more than 6 but still they are below x-axis.

Point D is the makes most sense here as it has x-coordinate more than 6 and it is above x-axis. This means that when Madison sold 7 wind chimes she was in a profit of $3.75.

5 0
3 years ago
Read 2 more answers
1/3 X 12 = 12 X ___ = __
valkas [14]
1/3=4 hop this help you
8 0
3 years ago
Use cubes. color and draw to show a way to take apart 7.
Ray Of Light [21]
What do you mean
give details
then i could help you




7 0
3 years ago
10 POINTS FOR WHOEVER GETS IT RIGHT!!
Andrew [12]

The definition of an example of expression is a frequently Answer:

Step-by-step explanation:The definition of an example of expression is a frequently used word or phrase or it is a way to convey your thoughts, feelings or emotions. An example of an expression is the phrase "a penny saved is a penny earned." An example of an expression is a smile. A facial aspect or a look that conveys a special feeling used word or phrase or it is a way to convey your thoughts, feelings or emotions.

equations...There are three major forms of linear equations: point-slope form, standard form, and slope-intercept form

Answers these are 5..

5 Examples

Noun Phrase; Friday became a cool, wet afternoon.

Verb Phrase; Mary might have been waiting outside for you..

Gerund Phrase; Eating ice cream on a hot day can be a good way to cool off.

Infinitive Phrase; She helped to build the roof.

Prepositional Phrase; In the kitchen, you will find my mom.

4 0
3 years ago
Given sec theta=-4/3 and 90°
hoa [83]

Answer:

Option A.

Step-by-step explanation:

It is given secθ = - \frac{4}{3}

then cosθ = -\frac{3}{4}

Now we know the identity

sinθ = \sqrt{1-cos^{2}\theta }

       = \sqrt{1-(-\frac{3}{4} )^{2}}

       = \frac{\sqrt{7} }{4}

Now sin2θ = 2sinθcosθ

Now we put the values of cosine and sine in the formula

sin2θ = 2×(-\frac{3}{4})(\frac{\sqrt{7}}{4})

         = -\frac{3\sqrt{7}}{8}

Therefore, option A. is the answer.

3 0
3 years ago
Other questions:
  • Show that f(x)=√x-5 is one-to-one and find f^-1
    9·1 answer
  • Charlie guesses that his dog weighs 34.5 lb. The dog actually weighs 32.7 lb.
    12·1 answer
  • Alan will rent a car for the weekend. He can choose one of two plans. The first plan has an initial fee of $55 and costs an addi
    10·2 answers
  • The number of marbles of different colors stored in a hat is listed below:
    12·2 answers
  • Which equations are equivalent to Y=2/3X-4 when written in slope-intercept form? Check all that apply. A =3X-2Y=4. B=2X-3Y=12. C
    12·2 answers
  • What is the maximum number of circles of radius 1 you can fit, without overlapping them,
    6·2 answers
  • If Peter piper picked a pepper how many peppers does he have?
    11·1 answer
  • Can someone help me please!!!!!!!!!!!!!!!!!!HELPPPPPO
    15·1 answer
  • May I please receive help? Please?
    7·1 answer
  • Express each fraction as a decimal:<br><br>- 2 4/100
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!