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Mama L [17]
3 years ago
10

Twenty-one less than a number is seven. What is the number? 3 14. 28 147

Mathematics
2 answers:
maks197457 [2]3 years ago
4 0

Answer:

28

Step-by-step explanation:

add 7 + 21

Gnom [1K]3 years ago
4 0

Answer: the answer will be 28

Step-by-step explanation:

First you have to add 21+7 which equals to 28 and that's how I got my answer.

Please mark me brainiiest.

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I need help. So it says to find the shaded area, and I'm not really good a things like this
krek1111 [17]

Answer:

86 cm²

Step-by-step explanation:

<u>1) Calculate the area of the square</u>

A=lw\\A=20*20\\A=400

Therefore, the area of the square is 400 cm².

<u>2) Calculate the area of the circle</u>

A=\pi r^2\\

\pi we can substitute with 3.14. To find the radius, we divide the diameter of the circle by 2. 20 cm is the diameter of the circle, so therefore, its radius is 10 cm.

A=3.14*10^2\\A=3.14*100\\A=314

Therefore, the area of the circle is 314 cm².

<u>3) Subtract the area of the circle from the area of the square</u>

A=400-314\\A=86

Therefore, the area of the shaded region is 86 cm².

I hope this helps!

3 0
3 years ago
Read 2 more answers
How to create a pattern with the rule n 3?
SCORPION-xisa [38]
If you copied the "n 3" part, it's very likely that your job was to create a pattern with either the rule n^3 or n*3.

In the case of the former, we can start with the initial number of 1 and increase by 1.
In that way, using the rule n^3 would create this pattern of numbers: 1, 8, 27, 64, and so on. Or stated in another way 1*1*1, 2*2*2, 3*3*3, 4*4*4 ...

In the case of the latter, we can start with the initial number of 1 and increase it by 1. 
In this way, using the rule of n*3 would create this pattern of numbers: 3, 6, 9, 12, 15, 18 and o son. Or stated in another way 1*3, 2*3, 3*3, 4*3, 5*3 ...
5 0
3 years ago
Most staircases in use today have 9−inch treads and 8 1 2 −inch risers. What is the slope of a staircase with these measurements
son4ous [18]
Rise over run
8 1/2÷9 equals .9444
6 0
3 years ago
There is a triangular parking lot at the local mall. The second angle of the triangular parking lot is six more than twice as la
Travka [436]

Answer:

The measure of the three angles are;

The first angle is 62°

The second angle is 28°

The third angle is 90°

Step-by-step explanation:

The given information are;

The shape of the parking lot = Triangular

Let the angles of the triangle be given as follows

First angle = A

Second angle = B

Third angle = C

The given triangle interior angle dimensions are;

A = 6 + 2× B

C = A + B

However, we have;

A + B + C = 180° (Angle sum property for a triangle)

Therefore;

A + B + C = 180° gives;

C + C = 180° (Transitive property)

2·C = 180°

C = 180°/2 = 90°

C = 90°

However, C = A + B  therefore;

90° = A + B and, A = 6 + 2 × B, we get;

A + B = 90° (Symmetric property)

6 + 2× B + B = 90° (Substitution property)

6 + 3·B = 90°

3·B = 90° - 6° = 84°

B = 84°/3 = 28°

B = 28°

From, A = 6 + 2 × B, we have;

A = 6 + 2 × 28° = 62°

A = 62°

First angle = A = 62°

Second angle = B = 28°

Third angle = C = 90°

The measure of the three angles are;

First angle is 62°

Second angle is 28°

Third angle is 90°.

8 0
3 years ago
Help Please, im stuck on this question.
lions [1.4K]

Answer:

irrational

Step-by-step explanation:

3/4 + sqrt(2)

3/4 is rational

sqrt(2) is irrational

The sum of a rational and an irrational number is irrational

8 0
3 years ago
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