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Roman55 [17]
3 years ago
7

Which pair of angles is congruent?

Mathematics
1 answer:
Lerok [7]3 years ago
8 0
Vertical angles are congruent.

2 is 153
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Let $a_1$, $a_2$, . . . , $a_{10}$ be an arithmetic sequence. If $a_1 + a_3 + a_5 + a_7 + a_9 = 17$ and $a_2 + a_4 + a_6 + a_8 +
vfiekz [6]

So

a be first term and d be common difference

  • a+a+2d+a+4d+a+6d+a+9d=17
  • 5a+21d=17--(1)

And

  • a+d+a+3d+a+5d+a+7d+a+9d=15
  • 5a+25d=15--(2)

Eq(1)-Eq(2)

  • -4d=-2
  • d=1/2

Put in second one

  • 5a+25d=15
  • a+5d=3
  • a+5/2=15
  • a=15-5/2
  • a=25/2
7 0
2 years ago
HELP!!! CORRECT ANSWER NEEDED OR ELSE I FAIL ;-; STUDY ISLAND !!
Ket [755]

Answer:

  B.  Step 2 uses the associative property, and step 3 uses the commutative property.

Step-by-step explanation:

The associative property lets you group terms for addition any way you like. It appears that in Step 2, the grouping is ...

  4 + (1/6 + 3) + 5/6

The commutative property lets you change the order of any pair of terms involved in addition. It appears that in Step 3, the order of the terms within the group has been swapped.

  4 + (3 + 1/6) + 5/6

_____

<em>Comment on associative and commutative properties</em>

What applies to terms in addition applies to factors in multiplication.

5 0
3 years ago
Solve the system using elimination. x − y = 4 −x − y = 6
kap26 [50]
X= 2 and y=-2 check by multiplying
4 0
3 years ago
Find x <br> Help me plz!!!
mariarad [96]

9514 1404 393

Answer:

  x = 8

Step-by-step explanation:

Assuming the figure is a parallelogram, the diagonals bisect each other. That means ...

  3x -11 = x +5

  2x = 16 . . . . . . . add 11-x to both sides

  x = 8 . . . . . . divide by 2

3 0
3 years ago
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Solve the system with<br> elimination.<br> x - y = 10<br> 3x - 2y = 25
raketka [301]

Answer:

Step-by-step explanation:

{x,y}={5,-5}

8 0
2 years ago
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