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3 years ago

I will mark Brainliest for first and correct answer. PLEASE NO LINKS

Mathematics

1 answer:

umka21 [38]3 years ago

4 0

Answer:

c) $18 for a pack of 15 pens

Step-by-step explanation:

calculate the cost for 1 pen then compare

a) 7 ÷ 5 = 1.4

b) 15 ÷ 10 = 1.5

c) 18 ÷ 15 = 1.2 (has the lowest cost for a pen)

d) 48 ÷ 30 = 1.6

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-x + 2y = 3 2x – 3y = -6

s2008m [1.1K]

Answer:

x = -3

y = 0

Step-by-step explanation:

Given equations :- 

-x + 2y = 3 ....... ( i )

2x - 3y = -6 ....... ( ii )

From ( i ) 

-x + 2y = 3

-x = 3 - 2y

x = 2y - 3 ........ ( iii )

From ( ii ) 

2x - 3y = -6

2x = -6 + 3y

$x = \frac{ - 6 + 3y}{2}$

........ ( iv )

Equating ( iii ) and ( iv )

x = x

$2y - 3 = \frac{ - 6 + 3y}{2}$

4y - 6 = -6 + 3y

4y - 3y = -6 + 6

y = 0

Putting value of y in ( iii )

x = 2y - 3

x = 2 ( 0 ) - 3

x = -3

4 0

3 years ago

The choir is selling candy bars to raise money for a trip they sell each candy bar for $5 there are 7 candy bars in each box and

Reika [66]

Answer:$2800

Step-by-step explanation: Lets first figure out how much money a box of candy bars is worth. We know that each candy bar is worth $5 and that there are 7 candy bars per box. We can multiply 7*5 to figure out that each box is worth $35.

Now lets figure out how many boxes can be sold each day. Each student can sell two boxes a day. 5 students selling 2 boxes each is 5*2= 10 boxes total sold a day.

Now finally we use what we found to figure out the amount of money made per day. We know that there are 10 boxes being sold and that each box makes them $35. We just multiply 10 boxes by $35 to get $350 dollars each day.

Since they sell for 8 days we just multiply 8*$350 to get $2800.

8 0

3 years ago

Solve for x: 8x - 2 - 5x = 8

Travka [436]

Answer:

3 1/3

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

Exact Form:

x = 10 /3

Decimal Form:

x = 3. 3 3

Mixed Number Form:

x = 3 1/3

6 0

3 years ago

Read 2 more answers

3C+B if C=-7 and b=4

zmey [24]

3c + b.....when c = -7 and b = 4

3(-7) + 4 =
-21 + 4 =
- 17 <===

8 0

3 years ago

How to convert 11/27 into a decimal

il63 [147K]

Answer:

11 ÷ 27 = 0.407407

Step-by-step explanation:

Una fracción, como 11/27, tiene un numerador y un denominador separado por una línea divisoria.

11 es el numerador, porque es el número de arriba de la línea divisoria.

27 es el denominador porque es el número de abajo de la línea divisoria.

Para convertir 11/27 a decimal, divide el numerador por el denominador.

4 0

4 years ago