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stira [4]
2 years ago
8

Which expression is equivalent to the expression below?

Mathematics
1 answer:
natulia [17]2 years ago
3 0

Answer:

Step-by-step explanation:

3(7-22x) = 21-66x

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Solve the system of linear equations. <br> −8x+5y=26<br> 9x−3y=−3
Sloan [31]

Answer: x = 3 and y = 10

Step-by-step explanation:

-8x + 5y = 26     .................. equation 1

9x - 3y = -3          ................ equation 2

Solving the system of linear equations by elimination method.

The means we have to make the coefficient of one of the variable the same in order to eliminate the variable first.

Let us eliminate the variable y first , this means we will multiply equation 1 by 3 and multiply equation 2 by 5. Doing this , we have

-24x + 15y = 78      ............. equation 3

45x - 15y = -15     ................ equation 4

Now that we have the same coefficient , we have to check their signs , if the have the same signs , we will subtract , that is , if both are having positive signs , we will subtract , if both have negative signs , we will also subtract but if their signs differ we will add. Following this rule and considering the equations above , the coefficients of y have different signs , so we will add equation 3 and equation 4 , so we have:

21x = 63

x = 63/21

x = 3

Substitute x = 3 into equation 1 or equation 2 to get the value of y , using equation 2 , we have

9x - 3y = -3

9(3) - 3y = -3

27 - 3y = -3

27+3 = 3y

30 = 3y

30/3 = y

Therefore y = 10

Therefore : x = 3 and y = 10

8 0
3 years ago
Which figure shows an example of symmetry?<br> A.<br> B.<br> C.<br> D.
Burka [1]

Answer:

D

Step-by-step explanat:

7 0
3 years ago
Read 2 more answers
2. What is the slope of the line that<br> passes through the points shown in<br> the table?
Nata [24]
The slope is 2. slope is change in the y values divided by change in x values
8 0
3 years ago
A rabbit's fur grows at the rate of 5 over 2 inches per month. How many months will it take the rabbit's fur to grow 15 over 4 i
Pavel [41]
5/2 inches per month * t = 15/4 inches
<span>t = ( 15/4 ) / ( 5/2) </span>
<span>t = 1.5 months</span>
7 0
3 years ago
A tree casts a shadow that is about 10 ft long. Javier, who is about 5 ft tall, is standing near the tree. Javier’s shadow is ab
Tju [1.3M]

10              4     ,  so basically you cross multiply : 10x=20 .... 20 divided by 10 is 2 . x=2

___   =        ___

5               x

5 0
3 years ago
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