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dybincka [34]
3 years ago
14

What is the first step in finding the unit price on a box of 20 pencils?

Mathematics
1 answer:
olga55 [171]3 years ago
7 0

You would need to know the cost of the box of 20, then you would divide the total cost by the number of pencils in the box. This would give you the cost of one pencil - which is the unit cost.


Example:

Lets say the box of 20 pencils cost $10.


Divide the total cost by the number of pencils:

10 / 20 = 0.50 - This means each pencil cost 50 cents, so the unit cost would be 50 cents per pencil.

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Two mechanics worked on the car the first mechanic work for five hours in a sec mechanic work for 15 hours together the tires a
FrozenT [24]

Answer:

Mechanic 1: $55 per hour

Mechanic 2: $105 per hour

Step-by-step explanation:

Given

Represent the rate of the first mechanic with x and the second with y.

So, we have:

x + y = 160

The total earnings is: $1850, so we have:

5x + 15y = 1850

Required

Determine the rate of each

The equations are:

x + y = 160 --- (1)

5x + 15y = 1850 --- (2)

Divide (2) through by 5

x + 3y = 370 --- (3)

Subtract (1) from (3)

x - x + 3y - y = 370 - 160

2y = 210

Divide through by 2

y = \frac{210}{2}

y = 105

Substitute 105 for y in (1)

x + y = 160

Make x the subject

x = 160 - y

Substitute 105 for y

x = 160 - 105

x = 55

Hence:

Mechanic 1: $55 per hour

Mechanic 2: $105 per hour

7 0
3 years ago
Identify a3 of a sequence: 0.25, 0.5, 0.75, 1, 1.25, 1.5,....<br> a3=
wariber [46]

Answer:

0.75

Step-by-step explanation:

The given sequence is an AP , as the difference of all the terms is same

a_3 = 0.75

8 0
4 years ago
The radius r of a sphere is 12 units. Find the volume of the sphere. Write your answer in terms of pie
Tamiku [17]

https://socratic.org/questions/what-is-the-volume-of-a-sphere-with-a-radius-of-12-units

the answer is on here

6 0
3 years ago
7/8 as a decimal<br><br> I got: .807 (repeating)
yan [13]

Answer:

the answer is .875

Step-by-step explanation:

u were close!! keep trying

8 0
3 years ago
URGENTLY ANSWER, RIGHT TRIANGLE TRIGNOMETRY
Otrada [13]

So for this you will be doing proportions. Your equation will look like this: \frac{5}{DE} =\frac{DE}{20}


Firstly, cross multiply: DE^2=100


Next, square root both sides of the equation, and your answer should be DE=10

3 0
3 years ago
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