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Murljashka [212]
2 years ago
5

HELP HELP HELPP MEEEE

Mathematics
2 answers:
Lostsunrise [7]2 years ago
8 0

Answer:5

Step-by-step explanation:

The perimeter of the rectangle is 20 because 7x2+3x2=20

And 20/4(sides of a square) =5

ser-zykov [4K]2 years ago
5 0

Answer:

5

Step-by-step explanation:

perimiter of rectangle is 3+7+7+3 = 20

square x+x+x+x=20

4x=20

x=20/4

x=5

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The equation a = 1/2(b1 + b2)h can be used to determine the area, a, of a trapezoid with height, h, and the base lengths, b1 and
andrew11 [14]

Answer:

2a/b1 +b2=h

And

2a/h -b2=b1

Step-by-step explanation:

8 0
3 years ago
A denotes an mn matrix. Determine whether the statement is true or false. Justify your answer. The row space of AT is the same a
ziro4ka [17]

Answer: true

Step-by-step explanation:

For an m*n matrix, the column space of A will be a space formed by the lineal combination of all the columns of A.

column space = a1*c1 + a2*c2 + ...

                       

where a1, a2, ... are scalars, and c1 is the vector of column 1.

Then we should write:

Column space = a1*(A₁₁, A₂₁, A₃₁, ...) + a2*(A₁₂, A₂₂, A₃₂, ...) + ...

Now, the transpose is defined as:

[At]₁₃ = A₃₁

Here i used the element with subindex 3 and 1, but is the same for every subindex.

Notice that if A is m*n, then [At] is n*m

Now, the row space of [At] will be, same as before.

Row space = b1*r1 + b2*r2 + ...

Where b1, b2, ... are scalars and the r's are the vector of each row.

                   = b1*( [At]₁₁ , [At]₁₂, [At]₁₃, ...) + b2*([At]₂₁, [At]₂₂, [At]₂₃, ...) + ...

Now we replace each term of the transpose by the associated element in the original matrix.

                   = b1*( A₁₁, A₂₁, A₃₁, ...) + b2*(A₂₁, A₂₂, ...) + ....

If we take:

b1 = a1, b2 = a2, b3 = a3, ...

We will have that the row space of [At] is the same as the column space of A.

4 0
2 years ago
{ 5x - y = 5<br> { 5x - 3y = 15<br> solve the system using substitution
Iteru [2.4K]

Answer:

Not sure sorry,but can you please help me on the following:

Step-by-step explanation:

Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the squares share one side with the rectangle. The total area of the constructed figure is 120 cm2. What is the perimeter of the rectangle?

8 0
3 years ago
Read 2 more answers
In trying to calculate the product of 5 and 12 in her head, Evie first multiplied 5 times 10 and then added the result to the pr
Pie

Answer:

Step-by-step explanation:

distributive

7 0
3 years ago
You might need: Calculator Problem Zane is a dangerous fellow who likes to go rock climbing in active volcanoes. One time while
Ksenya-84 [330]

Zane climb up in 33 seconds

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7 0
3 years ago
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