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ValentinkaMS [17]
4 years ago
15

HELPPPPP!!!!!

Mathematics
1 answer:
sergejj [24]4 years ago
8 0

Answer:

1. (x+2y)^2-ab    x^2+4xy+4y^2-ab

2. 3n-13<9       n<22/3

3. 6+n/7=4     n/7=-2

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fomenos

Answer:

A (a = 1)

Step-by-step explanation:

A coordinate point is always in the form (x,y) that means the first point is always x-coordinate and the second point is always y-coordinate.

The equation given is:

5x + y = 8

The point is (a,3), so that means x = a and y = 3

We substitute the values into the equation and find a. Shown below:

5x + y = 8

5(a) + (3) = 8

5a + 3 = 8

5a = 8 - 3

5a = 5

a = 5/5

a = 1

Answer choice A is right

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