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Yuliya22 [10]
3 years ago
11

Need help on this question

Mathematics
1 answer:
Soloha48 [4]3 years ago
7 0

Answer:

Both equal 4

Step-by-step explanation:

(a-b)^2

(7-9)^2

(-2)^2

4

a^2-2ab+b^2

7^2-2(7)(9)+9^2

49-126+81

4

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Brooke has to set up 70 chairs for the class talent show. But, there is not room for more than 20 rows.
den301095 [7]
If there are 70 chairs but only 20 rows then that means he will have to set up 3.5 chairs per row, or Brook could set up 14 rows with 5 chairs in each row.

Srry if that didn't help but that's what i got from that.
4 0
3 years ago
Cameron sponsor a fun raiser that 582 people attended he raise $6480 he charged $15 for balcony seats and $10 for crown seats ho
bagirrra123 [75]

Answer:

132 people bought balcony tickets and 450 bout ground tickets

Step-by-step explanation:

let x be balcony and y for ground

x+y=582

15x+10y=6480  solve by adding(subtracting)/eliminating process

multiply first equation by 15 to eliminate x:

15x+15y=8730

15x+10y=6480      subtract

15x+15y-15x-10y=8730-6480

5y=2250

y=2250/5=450

x+y=582

x=582-450=132

8 0
3 years ago
If A c B and A N B= • then which of the following can be concluded about the sets A and B!
Sergio [31]

Step-by-step explanation:

Set A is a subset of set B if all the elements of A are also the elements of Set B.. (common element)

The above set have 0 common elements so.. if there is no common element and are subsets then it means that there arent any elements in both the sets

so, the answer for the question would be "both the Sets A and B are the empty sets"

6 0
1 year ago
The length of your classroom is about 3.5 x 10^2 inches. If the hallway is ten times as long as the classroom, what is the lengt
tatuchka [14]

Answer:

3.5x10^3

Step-by-step explanation:

3.5x10^2 = 350

350x10 = 3500

3500 = 3.5x10^3

8 0
3 years ago
Identify the surface whose equation is given. rho2(sin2(φ) sin2(θ) + cos2(φ)) = 49
Paha777 [63]

Answer:

The surface is a cylindrical surface with radius 7 units

Step-by-step explanation:

The equation is properly written as:

\rho^{2} (sin^{2} \phi sin^{2} \theta + cos^{2} \phi) = 49

The above equation takes the form y^{2} + z^{2} = r^{2}

Where y^{2} = \rho^{2} sin^{2} \phi sin^{2} \theta

y = \rho sin \phi sin \theta

and z^{2} = \rho^{2}cos^{2}  \phi

z = \rho cos \phi

r^{2} = 49

r = 7 units

The surface is a cylindrical surface with radius 7 units

4 0
3 years ago
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