3 years ago

What is the solution to this system of equations? 3x + 2y=45 , 4x-y=5

1 answer:

3 0

The solution is (5, 15)

Multiply the second equation by 2 and then add through.

3x + 2y = 45
8x - 2y = 10
-----------------
11x = 55
x = 5

Then plug in to get the y value

3(5) + 2y = 45
15 + 2y = 45
2y = 30
y = 15

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Find the value of c that makes the expression a perfect square trinomial. x2 + 9 4 x + c

JulijaS [17]

The value of c is 81/64 for the expression a perfect square trinomial.

<h3>What is an Expression?</h3>

An expression can be defined as a mathematical statement that consists of variables, constants and mathematical operators simultaneously.

It is given that an expression

x² +9/4x +c is a perfect square polynomial

c =?

(a+b)² = a² +2ab+b²

2ab = 9/4

b = 9/8

c = b² = 81/64

Therefore the value of c is 81/64 for the expression a perfect square trinomial.

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5 0