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guapka [62]
4 years ago
15

Maria wants to add to her CD collection. If a CD costs $12, which expression shows the cost of d CDs? A. 12 - d B. 12 ÷ d C. 12

+ d D. 12 × d
Mathematics
2 answers:
aleksklad [387]4 years ago
7 0

Step-by-step explanation:

Cost of CDs

= Number of CDs * Cost of one CD

= d * $12

= $12d. (D)

The answer is using multiplication as we have a unit rate and we wish to find the total.

kipiarov [429]4 years ago
7 0

Answer:

D. 12*d, or 12d

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Winnie is considering two plans for her piano lessons plan a $68.40 for 6 piano lessons plan b $41.80 for 4 piano lessons for wh
inna [77]

Answer:

Winnie will pay less for plan B

Step-by-step explanation:

If you divide $68.40 by 6 then you get $11.40 per lesson but if you divide $41.80 by 4 then you end up with $10.45 per lesson thus making it the lower price.

Hope I could help, have a wonderful day/night :)

5 0
4 years ago
Samuel collected 30 signatures from fifth-grade students at his school. He noticed that 3/5 of the signatures were done in penci
Iteru [2.4K]

Answer:

30 / 5 = 6.

6x3=18

Step-by-step explanation:

Hope this helped! Have a great day!

3 0
3 years ago
Read 2 more answers
Observa los puntajes de las respuestas de una evaluación que tuvo de 100 preguntas. Si Alfredo contestó correctamente 57 pregunt
n200080 [17]

La pregunta está incompleta:

Observa los puntajes de las respuestas de una evaluación que tuvo de 100 preguntas. Si Alfredo contestó correctamente 57 preguntas, 16 incorrectas y el resto las dejó en blanco, ¿qué puntuación obtuvo en la evaluación?

Puntos por respuesta:

Correctas: 4

En blanco: -1

Incorrectas: -3

Answer:

Alfredo obtuvo una puntuación de 153.

Step-by-step explanation:

De acuerdo a la información proporcionada, conoces el número de preguntas en la evaluación y el número de preguntas que Alfredo contestó de forma correcta e incorrecta y tienes que restar estas del total de preguntas para encontrar el número de preguntas que dejó en blanco:

100-57-16=27

Ahora, debes multiplicar el número de respuestas correctas, incorrectas y en blanco por su respectivo puntaje:

Correctas: 57*4=228

En blanco: 27*(-1)=-27

Incorrectas: 16*(-3)=-48

Finalmente, debes sumar los resultados obtenidos por cada tipo de respuesta:

228+(-27)+(-48)= 228-27-48=153

De acuerdo a esto, la respuesta es que Alfredo obtuvo una puntuación de 153.

4 0
3 years ago
and run 6 Laps on the track she runs a total of 1 mile or 5,280write and solve an equation to find the distance in feet that she
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5280/6, so for each lap she runs 880 feet 
7 0
3 years ago
Deon has a pizza with a diameter
OverLord2011 [107]

The square box is enough to fit the pizza with a diameter of 10 inches inside. Since the area of the square box is more than the area of the pizza, the pizza fits easily in the square box.

<h3>What is the area of the circle and the square?</h3>

The area of the circle is

Ac = πr² = πd²/4 sq. units

Where r is the radius and d is the diameter of the circle.

The area of the square is given by

As = s² sq. units

Where s is the length of the side of a square.

<h3>Calculation:</h3>

It is given that a pizza(in a circular shape) with a diameter d = 10 in is to be placed in a square box of the same length as the diameter of the pizza.

So,

The area of pizza is

Ap = Ac = πd²/4 sq. units

     = π(10)²/4

     = 25π

     = 78.54 sq. in

Then, the area of the square box with the length same as the diameter of the pizza is,

As = d²

    = 10²

    = 100 sq. in

Since the area of the square is more than the area of the pizza (100 sq. inch > 78.54 sq. inch), the pizza easily fits into the square box.

Learn more about the area of a circle here:

brainly.com/question/15673093

#SPJ1

7 0
2 years ago
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