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tatuchka [14]
3 years ago
14

If one is subtracted from seven times a certain number,

Mathematics
1 answer:
prohojiy [21]3 years ago
5 0

Answer:

The number is 8

Step-by-step explanation:

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A circle’s circumference is approximately 76 cm. Find the radius, diameter, and area of the circle to the nearest centimeter. Us
PolarNik [594]

Answer: Area= 459.73cm^2

Step-by-step explanation: Circumference of a circle is 2πr

76=2×3.14×r

r= 76÷(6×3.14)

r=12.10

Area of a circle= πr^2

Area= 3.14×(12.10)^2

Area= 456.73cm^2

3 0
3 years ago
A square pyramid has sides of 8 m. Each face is an equilateral triangle.
Annette [7]

Lateral Area means Area of all four triangles

Now area of 1 triangle = \frac{\sqrt{3}}{4} a^2  =  \frac{\sqrt{3}}{4} 8^2

= \frac{\sqrt{3}}{4} * 64 = 16\sqrt{3} square meters

Now for four triangles we multiply by 4

So

Lateral area of pyramid =4* 16\sqrt{3} = 64\sqrt{3} m^2

that is Option D

3 0
3 years ago
Richard practiced piano each of 3 piano solos for 5/12 hour. How long did he practice in all? Please show how to figure
Aleonysh [2.5K]
3 piano solos....each is 5/12 hr....
u can either add : 5/12 + 5/12 + 5/12 = 15/12 = 1 1/4 hrs

or u could multiply : 3 * 5/12 = 15/12 = 1 1/4 hs

either way....same answer
6 0
2 years ago
Darren fed his dog 3/4 pound of canned food and 1 1/3 pounds of dry food today. How many pounds of food was that in all?
Evgen [1.6K]

Answer:

2 1/12 lbs

Step-by-step explanation:

Add the canned and the dry together

3/4 + 1 1/3

Get a common denominator of 12

3/4 *3/3  + 1 1/3 *4/4

9/12 + 1 4/12

1 13/12

1 + 12/12 + 1/12

2 1/12 lbs

3 0
2 years ago
Read 2 more answers
Greg studied for 12 minutes. This is 40% of the time he wants to study today. How many more minutes does Greg need to study toda
dolphi86 [110]

Answer:

18 More Minutes

Step-by-step explanation:

Hi,

I think I can help.

What I would first do here is try to find the value of 10% relative to the 12 minutes. If we find what 10% is we can multiply that to get 100% to find the total amount of minutes he wants to study. We can then subtract the time already studied to find our answer.

To do this we want to take the 40% we have and find 10. We can do 40/4 to find this since 40 divided by 4 is actually 10.

But if we do this we also have to do with to the number it is relating to / representing. Which is 12. (12 minutes = 40%)

So we can do :

40 / 4

=

10%

Also

12 / 4

=

3

So with this we can conclude that 10% of his total time is 3 minutes.

Now lets multiply this by 10 to get the 100% we are looking for so we can get the total amount of time he spent studying.

So :

10% x 10

=

100%

3 x 10

=

30 minutes

So his total time is 30 minutes of studying, but we have to find how many more minutes after his 12.

We can now simply take the total time and take off the time spent already to find this answer :

30 - 12

=

18 minutes

That is your answer, he needs to study 18 more minutes.

I hope this helps!

If you have any questions or concerns please comment or message me! :)

7 0
2 years ago
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