Mathematics High School

Edwin bought 3 cds and 7 dvd for $80 Jessica bought 6cds and 3 dvds for $63.75 which system of equation could be used to determine how much one cd and one dvd cost

Answers

Answer 1

Answer:

The system of equations 3x + 7y = 80 and 6x + 3y = 63.75 can be used to determine the cost of one CD and one DVD.

Step-by-step explanation:

Given that:

Cost of 3 CDs and 7 DVDs = $80

Cost of 6 CDs and 3 DVDs = $63.75

Let,

x be the cost of one CD

y be the cost of one DVD

According to given statement;

3x + 7y = 80

6x + 3y = 63.75

Hence,

The system of equations 3x + 7y = 80 and 6x + 3y = 63.75 can be used to determine the cost of one CD and one DVD.

Related Questions

subtract 637.42 - 29.71

Answers

Answer:

607.71

Step-by-step explanation:

637.42-29.71=607.71

Answer:

607.71

Step-by-step explanation:

Solve the equation. You may find using algebra tiles helpful in solving this problem.
X +3=-X-3

Answers

Answer:

X+3=-X-3

+X    +X

2X+3=-3

    -3   -3

2X=-6

/2    /2

X=-3

Step-by-step explanation:

Answer:

x=--3

Step-by-step explanation:

x+x=-3-3

2x=-6

x=-6/2

x=-3

If a quadrilateral is a square, then it is a rhombus (True or False)

Answers

Answer:

true

Step-by-step explanation:

because the sequare has 4 congruent sides

PLEASE PLEASE HOW MANY TIMES CAN I SAY PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer like
Answer 1.___________
Answer 2.___________
Answer 3.___________
Answer 4.___________
Answer 5.___________

Answers

1. C
2. A
3. B
4. D
6. B
I think these are right

Find the measure of angle A.
1+ 38
x + 68
A) 30°
C) 26°
B) 35°
D) 60°

Answers

Answer:

b

Step-by-step explanation:

b

f(x) = -x^2+10x - 17

Answers

Answer:

theres a graph with the vertex values if that's what you were looking for

Step-by-step explanation:

PLZ HELP I don't get this y-5=1/3(x+12)

Answers

Answer:

If solving for slope

y = 1 /3 x + 9

for slope would be y=1/3x+9

A new soft drink has 20% less sugar than before.
The drink had 50 grams of sugar originally.
How much less sugar does it have now?

Answers

20% of 50 is 10 (50 x .20 = 10). If the original drink had 50 grams, and the new one has 20% (10 grams) less...then the new drink would have 40 grams of sugar (50-10=40).

The required amount of sugar is given as 40 grams.

Given that,
A new soft drink has 20% less sugar than before. The drink had 50 grams of sugar originally, how much less sugar it has now is to be determined.

What is simplification?

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

here,
According to the question,
The final amount of sugar = [1 - 0.02][50]
                                  = 40 grams

Thus, the required amount of sugar is given as 40 grams.

Learn more about simplification here:

https://brainly.com/question/1369388

#SPJ2

Monica deposits ​$200 into a savings account that pays a simple interest rate of 3.9​%. Paul deposits ​$300 into a savings account that pays a simple interest rate of 3.2​%. Monica says that she will earn more interest in 1 year because her interest rate is higher. Is she​ correct? Justify your response.

Answers

Answer: No, Monica is incorrect.  Paul will get more interest in 1 year.

Step-by-step explanation:

Formula: Simple interest : [tex]\dfrac{\text{principal x rate x time}}{100}[/tex]

Given: For Monica, Principal =$200, rate = 3.9%

Interest in 1 year = [tex]\dfrac{200\times3.9\times1}{100}=\$7.8[/tex]

For Paul, Principal =$300, rate = 3.2%

Interest in 1 year = [tex]\dfrac{300\times3.2\times1}{100}=\$9.6 > \$7.8[/tex]

Thus , Paul will get more interest in 1 year.

i.e. Monica is incorrect.

A school has 6 fifth grade classes, with a mean class size of 24 students. Five of the classes had 20,27,25,28 and 21; what is the size of the remaining class?

Answers

Answer:

the remaining class size is 23 students

Step-by-step explanation:

6*24=144 students in all classes together

144-20-27-25-28-21=23

7) What is "$96 spent in 4 hours" written as a unit rate in minutes?
D) $1.60/minute
C) $0.53/minute
A) S0.40/minute
B) $0.30/minute

Answers

I think it’s A sorry if I’m wrong

root(3, 148 * 200) ; evaluate correct to three decimal places​

Answers

Answer:

3148

Step-by-step explanation:

Find the x- and y-intercept for the given equation: -7x -2y = 14

Answers

Answer: X intercept (-2,0) Y intercept (0,-7)

Step-by-step explanation:

5a. For each quantity, decide whether circumference or area would be
needed to calculate it. Explain or show your reasoning. The distance around
a circular track.

Answers

May be able to get the most from the first time since I've been using this method for producing an excellent job and the other hand, the first thing I noticed.

Matt fill his pail with 16 kg of sand but found that it was too heavy to carry he scooped out 7 kg of the sand what is the mass of the sand in the pail now
a 900 i
b 9 g
c 9 g
d 9 kg

Answers

I would say the answer is d

2 3/5 x 5/6 plz help​

Answers

Answer:

2 1/6

Step-by-step explanation:

2 3/5 x 5/6

convert the 2 3/5 to an improper fraction so it can be easier to multiply

2 3/5 = 13/5

13/5 * 5/6

All you need to do is multiply across. Both denominators, and both numerators.  

13 * 5 = 65 (numerator)

5 * 6 = 30 (denominator)

65/30 and that is in an improper form

2 5/30 = 2 1/6 = In a simplified mixed number

2 1/6

Hope this helped!

Have a supercalifragilisticexpialidocious day!

Help me please with This no need to explain

Answers

The answer your looking for is D

Answer:

215

Step-by-step explanation:

*sits in a corner rocking back and forth*

Answers

Answer:

-12 is the answer.

Step-by-step explanation:

-12 - (-5) = -7

The two negative one right after another turns into a plus, or +.

-12 + 5 = -7

Think of 5 positive things and -12 negative things.

O O O O O

P  P  P  P  P  P  P  P  P  P  P  P

5 of the positive things will cancel out 5 of the negative things, leaving behind 7 negative things.

#teamtrees #WAP (Water And Plant)

I need help with this

Answers

c^2/f^2

hope that helps

.....I need some help :/

Answers

Answer:

B. 1

Step-by-step explanation:

1. Simplify everything in the parentheses (4^4) = 256

2. Simplify 256^9 = 4.7223665e+21

3. Divide your answer by 4^36 (= 4.7223665e+21) which equals 1.

the correct answer is b

Diego saw a movie that was 1 hour and 40 minutes long. The movie ended at 2:30. What time did the movie start?
А
12:50
B
1:00
с
1:50
D
4:10?

Answers

I think the answer is D

Answer: A

Step-by-step explanation: It can't start at 4:10 because it ended at 2:30. It cant be 1:50 because it would ended a few hours ago. If you we're stuck with B and A then good job. It can't be 1:00 because the movie would of ended 10 minutes later. So in this cause the answer is A.                                        

                                                                                         Hope this helped!!!

Could someone do this real quick

Answers

Answer: x= 5/7 or x= 0.714285

Step-by-step explanation:

What is the measurement of the unknown angle?
70°
2
127
146°

Answers

Answer:

Where's the picture of it?

(1/4)^{5/2}
pls help

Answers

Answer:

5/8

Step-by-step explanation:

Do it your self loser

Helpppp pleaseeee helppppp

Answers

Answer:

2x-1=x+7

-x     -x

2x-1=7

+1      +1

2x=7

/2    /2

x=3.5

Step-by-step explanation:

What is √7 rounded to the nearest hundredth?

Answers

Answer:

2.64

Step-by-step explanation:

The sqhate root of 7 is 2.64575131106. Usually this would be 2.64 when rounded to nearest hundredth.

When using the Elimination
method for systems, you may
have to multiply the top or
bottom equation by a number to
create a
pair.

Answers

i believe you’re corrext
yes i think ur answer is correct

A small box of nails was 10 2⁄8 inches tall. If the large box of nails was 2 2⁄5 inches taller, how tall is the large box of nails? Answer as an improper fraction.

Answers

Answer:

253/20

Step-by-step explanation:

Write 57 as a fraction, decimal, and as a percent.

Answers

Answer:

0.57    14.5/25   57%

Step-by-step explanation:

decimal fraction percent

Answer:

Fraction: 57/1

Decimal: 57.

Percent:5700

Step-by-step explanation:

Fraction: Every number can be expressed over

Decimal: every number has a decimal point at the end of it

Percent:if you multiply any number by 100 and add a percent at the end you will get the percent of the number.

HURRY WILL MARK YOU BRAINLIEST

Answers

Answer:

we have:

x + 4 + x + 6 + x + 2 + x + 18 + x = 180.3

<=> 5x + 30 = 540

<=> 5x = 520

<=> x = 104

we also have: m<5 + x = 180

<=> m<5 = 180 - 104

<=> m<5 = 76

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