1.1. Which statement explains why the two systems of equations below have the

Mathematics

1 answer:

marin [14]3 years ago

7 0

Answer:

B. The first equation in B is the sum of the equations in A, while the other is obtained

by multiplying the first equation in A by 2.

Step-by-step explanation:

If we add the first two equations that shown in A so

6x + 8y + 2x - 5y = -10 + 12

8x + 3y = 2

Now the first equation in A would be multiplied by 2

2(6x + 8y = -10)

12x + 16u = -20

Therefore the correct option is B.

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The sum of twice a number and a larger number is 145. The difference between the numbers is 55. Let x represent the smaller numb

frutty [35]

X and y are the numbers
y>x

sum (addition) of twice a number (2x) and larger number (y) is (=) 145
2x+y=145

difference between them is 55 (y is bigger so it would be x is subtracted from y)
y-x=55

so the equations are

2x+y=145 and
y-x=55

we could add x to both sides in the 2nd equation to obtain
y=x+55, but that doesn't really represent that the difference is 55, though they are the same euation

so I would say C and D only

6 0

3 years ago

Read 2 more answers

Does anyone know the answer to this question

lys-0071 [83]

ANSWER

$\cos B = \frac{ \sqrt{3} }{3}$