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vovangra [49]
3 years ago
8

A)Addition B)Division C)Reflexive D)substraction

Mathematics
2 answers:
8_murik_8 [283]3 years ago
7 0
The answer is letter B, division. Your are dividing by -3 in both sides to isolate x.
liberstina [14]3 years ago
6 0
Division, because you are dividing both sides by -3
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William is setting up for folding chairs for a meeting he arranges the chairs and seven rows of the same link he has three chair
DiKsa [7]

Answer:

William has a total of 66 chairs.

Step-by-step explanation:

Let the number of chairs in each row be 'x'.

Also let the Total number of chairs be 'y'.

Given:

If he arranges the chairs in seven rows of the same length he has three chairs left

Number of rows = 7

Number of chairs left = 3

Now we can say that;

Total number of chairs will be equal to number of chairs in each row multiplied by Number of rows plus Number of chairs left.

framing in equation form we get;

y=7x+3

Also Given:

If he arranges the chairs in five rows of the same length he has 21 chairs left

Number of rows = 5

Number of chairs left = 21

Now we can say that;

Total number of chairs will be equal to number of chairs in each row multiplied by Number of rows plus Number of chairs left.

framing in equation form we get;

y=5x+21

Now we know that Total number of chairs are same.

Hence we can say that both the equations are equal.

7x+3=5x+21

Combining like terms we get;

7x-5x=21-3\\\\2x= 18

Dividing both side by 2 we get;

\frac{2x}{2}=\frac{18}{2}\\\\x=9

So we can that there are 9 chairs in each row.

Now to find the total number of chairs he has we will substitute value of x in any of the equation we get;

y =7x+3\\\\y=7\times9+3\\\\y=63+3 =66

Hence William has a total of 66 chairs.

8 0
3 years ago
1.<br> When 3x2 - 2x + 7 is subtracted from 57-4x+10, AWO is the difference?
Eduardwww [97]

Combine like terms:

3 x 2 - 2x + 7 - 57 - 4x + 10

-34 - 6x

7 0
2 years ago
Answer the circled ones and ill give brainiest!!
sergejj [24]
8B and 10 not sure probably centre??
3 0
2 years ago
Who can help me with the answer???
makvit [3.9K]
The answer is D 8 1/4
4 0
2 years ago
If (x - 2)² = 49 , then x could be?
JulsSmile [24]
(x-2)^2=49\iff x-2=\sqrt{49}\ or\ x-2=-\sqrt{49}\\\\x-2=7\ or\ x-2=-7\\\\x=7+2\ or\ x=-7+2\\\\x=9\ or\ x=-5\\\\Answer:x\in\{-5;\ 9\}
4 0
3 years ago
Read 2 more answers
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