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pentagon [3]
2 years ago
12

You had $21 to spend on three gel pens. After buying the pens you had $12 left over. How

Mathematics
2 answers:
Natasha_Volkova [10]2 years ago
7 0

Answer:

$3

Step-by-step explanation:

$21 - $12 = 9

9 / 3= 3

Answer is $3 each pen

koban [17]2 years ago
3 0

Answer:

Each pen cost 3 dollars

Step-by-step explanation:

12 plus 9 is 21 which is how much you had. if you need 3 pens and you spent 9 dollars each pen costs 3 dollars because 9 divided by 3 is 3.

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The probability that it will rain on Thursday is 67%. What is the probability that it won’t rain on Thursday? Express your answe
kondaur [170]

Answer:

33%

Step-by-step explanation:

Since the probability of rain on Thursday is 67%, the probability of no rain on Thursday is 100% - 67% = 33%.

4 0
1 year ago
In a 5 km race, Anna swims 450 m, then runs 800 m. She then cycles the rest of the race. How many kilometres does she cycle?
Umnica [9.8K]
5km = 5000 meters
450m+800m= 1250m
5000m-1250m= 3,750m
3 3/4 km
6 0
3 years ago
How much material is required to make a pipe that is 300 cm long whose outer diameter is 8 cm with an inner diameter of 5 cm? Sh
worty [1.4K]

Answer:

Step-by-step explanation:

If you had a solid cylinder, in order to find the amount of material that makes up that solid cylinder, you would find the volume using the radius of 4 (half of the diameter 8).  BUT we want to know the volume of the solid with the radius of 4 minus the solid that has a radius of 2.5 (half of the diameter 5).

V_o-V_i  That's volume outer - volume inner.  To find the outer volume:

V=\pi r^2h so

V_o=\pi (4^2)(300) and

V_o=4800\pi  and do the same for the inner volume:

V_i=\pi (2.5^2)(300) and

V_i=1875\pi

Subtract the inner from the outer:

4800\pi-1875\pi=2925\pi cm^3

If you need your answer in decimal form, then the volume is

9189.16 cm³

4 0
2 years ago
On Monday Harold picked up four donuts and two large coffees for the office staff. He paid 4.08. On Tuesday Melinda picked up tw
Mandarinka [93]
One way to look at this is to make 2 equations and treat it as a set of equations. We will make the cost of a donut equal to x, and the cost of a coffee equal to y.

Harold's order:
4x + 2y = 4.08

Melinda's order:
2x + 3y = 3.92

To combine these equations, we need to cancel out either x or y:
4x + 2y = 4.08
<span>2x + 3y = 3.92
</span>
4x + 2y = 4.08
<span>4x + 6y = 7.84
</span>
4x + 2y = 4.08
<span>-4x - 6y = -7.84
</span>
We can now combine these equations:
4x + 2y = 4.08
<span>-4x - 6y = -7.84
</span>
-4y = -3.76

y = 0.94

Therefore the cost of a large coffee is $0.94. We can plug this into either original equation to find the cost of a donut.
<span>4x + 2y = 4.08
</span>4x + 2(0.94) = 4.08
4x + 1.88 = 4.08
4x = 2.20
x = 0.55

The cost of a donut is $0.55, and the cost of a large coffee is $0.94.
8 0
3 years ago
Marco scored 1,753 points
enyata [817]

Answer:

All you have to do is subtract!

<em>1753 - 887</em> = 866

Therefore, Marco scored 866 more points than Jasmine. Hope this helped! :)

3 0
3 years ago
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