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Mkey [24]
2 years ago
6

Two pens and one eraser cost $35 and three pens and four erasers cost $65. Find the cost of the pencil and eraser separately.

Mathematics
1 answer:
Nikitich [7]2 years ago
3 0

Answer:

Pencil is $15 and erasers are $5

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Allison needs 18 liters of 5% saline solution . She has a 1% solution available. How many liters of the 1% solution and how many
professor190 [17]

Answer:

10 litres of 1% solution and 8 litres of 10% solution

Step-by-step explanation:

Let vol of 1% solution = x

So vol of 10% solution = 18 - x

5% of 18 litres = 0.9

Equation formed is

<h3>x * (1/100) + (18 - x)*(10/100) = 0.9</h3>

x + (18 - x)10 = 0.9 * 100

x + 180 - 10x  = 90

-9x = 90 - 180

-9x = -90

 x = 10 litres

<h3>10 litres of 1% solution and 8 litres of 10%</h3>

3 0
4 years ago
1 × 6,391 _____<br><br> 0.1 × 6,391 ____<br><br> 0.01 × 6,391 _____
Cerrena [4.2K]

1.= 6,391  

2.=6,3910

3. = 6,39100

All you do is add the 0s at the end


5 0
3 years ago
Based on the information given, can you determine that the quadrilateral must be a parallelogram? Explain.
Dominik [7]

Answer:

Because N is the midpoint of the two diagonals so the quadrilateral must be a parallelogram

6 0
3 years ago
Read 2 more answers
Describe a set of transformations that would map Red Triangle to the Blue Triangle.
abruzzese [7]
1) translation of 2 down
2) translation of 5 right
6 0
2 years ago
What is the PV of an ordinary annuity with 10 payments of $2,700 if the appropriate interest rate is 5.5%? Group of answer choic
Verizon [17]

Answer:

The PV of an ordinary annuity with 10 payments of $2,700 if the appropriate interest rate is 5.5% is $20,352.

Step-by-step explanation:

P = PMT [(1 - (1 / (1 + r)^{n})) / r]

= 2,700 [(1 - (1 / (1 + 0.055)^{10})) / 0.05]

= 2,700 [(1 - (1 / (1 + 0.055)^{10})) / 0.05]

= 2,700 [(1 - (1 / (1.708)) / 0.05]

= 2,700 [(1 - 0.58)) / 0.05]

= 2,700 [(0.41457) / 0.05]

= 2,700(7.53)

=$ 20,352

5 0
4 years ago
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