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Yakvenalex [24]
3 years ago
7

Write an addition sentence that has a sun of 20

Mathematics
2 answers:
NeTakaya3 years ago
8 0
Hi There,

An addition sentence with the sum of 20, is 10+10, this is the answer because if you add 10 to 10 you should get 20 which is the sum.

Hope This Helped :)

Vlada [557]3 years ago
5 0
10+10=20, 15+5=20 Those are both addition sentences that have a sum of 20.
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What is the determinant of the coefficient matrix of the system {4x+3y+2z=0 -3x+y+5z=0 -x-4y+3z=0
slava [35]

Answer:

  130

Step-by-step explanation:

You want the determinant of the matrix ...

  \left[\begin{array}{ccc}4&3&2\\-3&1&5\\-1&-4&3\end{array}\right]

One way to figure it is as the difference between the sum of products of the down-diagonals and the sum of products of the up-diagonals:

  D = (4)(1)(3) +(3)(5)(-1) +(2)(-3)(-4) -(-1)(1)(2) -(-4)(5)(4) -(3)(-3)(3)

  = 12 -15 +24 +2 +80 +27

  D = 130

The determinant of the coefficient matrix is 130.

_____

Many scientific and graphing calculators and web sites can perform this calculation for you.

7 0
3 years ago
A swimming pool has a capacity of 2,500 gallons of water. The output of a hose is 25 gallon per minute. How much time would it t
g100num [7]

Answer:

  • 100 minutes

Solution:

<u>We know that:</u>

  • Capacity = 2,500 gallons
  • Hose = 25 gallons/minute

Solution:

  • 25 gallons = 1 minute
  • => 25x gallons = x minutes = 2500 gallons
  • => 25x = 2500
  • => x = 100 minutes

Hence, it will take 100 minutes to fill the pool.

4 0
2 years ago
Helppppppppppppp!!!!!
Marysya12 [62]
D cause u can round 8 to 10
5 0
2 years ago
Read 2 more answers
AB has a vértices at (-5,1) and (-3,7). After a transformation, the image had endpoints at (3,-1) and (5,5). Describe the transf
Scrat [10]
That looks like a translation; let's check.  We have

A(-5,1), B(-3,7), A'(3,-1), B'(5,5)

If it's a translation by T(x,y) we'd have

A' = A + T

B' = B + T

so 

T = A' - A = (3,-1) - (-5,1) = (8,-2)

and also 

T = B' - B = (5, 5) - (-3, 7) = (8,-2)

They're the same so we've verified this transformation is a translation by (8,-2), eight right, two down.

 



5 0
2 years ago
Read 2 more answers
Find the area of each figure. Round to the nearest tenth. Use 3.14 or 22/7
sertanlavr [38]

Answer:

d. 28.3

Step-by-step explanation:

Given

Radius ( r) = 3 m

Area of the circle

= π r²

= 3.14 * 3* 3

= 28.26

= 28.3 ft²

3 0
3 years ago
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