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stich3 [128]
3 years ago
12

Plz help I’m on time

Mathematics
1 answer:
kirill [66]3 years ago
8 0
The answer is the 3rd options
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The length of a rectangle is four times it width. If the perimeter of the rectangle is 70 ft, find its length and width
mojhsa [17]

Answer:

length= 4w

width= w

perimeter= 2(l+w)

70= 2(4w+w)

70=8w+2w

<u>70</u>=<u>10</u>w

10. 10.

w= 7ft

l= 7×2

=56

7 0
2 years ago
GIVING BRAINLIEST!!!!!!!!!!I NEED HELP
lapo4ka [179]
Answer: (-20,-4)

First, you substitute y into the first equation to get 0.01x - 0.3(0.1x - 2) = 1

You then distribute the 0.3 to what is inside the parentheses to get 0.01x-0.03x+0.6=1
(Note: the 0.6 is positive because two negatives multiplied equal a positive)

Now you combine like terms to get -0.02x+0.6=1

Subtract 0.6 from both sides of the equal sign to get -0.02x=0.4

Divide each side by -0.02 to get x=-20

Now plug in -20 to y=0.1x-2 to get y=-4

This gives you the answer (-20,-4)
8 0
3 years ago
Read 2 more answers
Estimate 137,638 to the nearest whole number
Tamiku [17]
The answer would be 140,000 :)
6 0
3 years ago
Susan's property is assessed at $27,500. The property tax rate in her city is 3.25%.
Vsevolod [243]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

If Susan's property is assessed at $27,500. The property tax rate in her city is 3.25%. the property tax should be <span>893.75. 

Solution:

</span>27500 * 0.0325 = <span>893.75</span>
6 0
3 years ago
Read 2 more answers
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
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