Which system of equations is equivalent to the following system?

4x + y = 4

2x + 7y = 28

(A) 4x + y = 4

-2x - 7y = 28

(B) 4x + y = 4

-8x - 28y = 112

(C) - 28x - 7y = - 28

2x + 7y = 28

(D) - 8x - 2y = 8

2x + 7y = 28

If (2x-3) and (x+5) are multiplied to form the trinomial ax^2 + bx+c, what is the value of b

Is the route square of 154 rational or irrational

Multiply to - 245 but adds to - 28

When nancy started middle school, she was 60 inches tall. when she started high school, she was 66 inches tall. what was the percent change in her height?

Find one counter example to show that the conjecture is false. angle 1 and angle 2 are supplementary, so one of the angles is acute. Choose the best counter example for the conjecture. A. m ∠ 1 = 40° and m ∠ 2 = 144°B. m ∠ 1 = 90° and m ∠ 2 = 90°C.

The real number 8.09 belongs to which set of number A. natural numbers B. irrational numbers C. integers

8. 72 is what percent of 45?

Let f (x) = x^2 - 2x + 2 and g (x) = x - 3. find f (x) times g (x)

A survey found that 9 out of 100 people are left-handed. On the basis of this survey, how many people in a group of 8000 are likely to be left-handed? A. 900 B. 800 C. 720 D. 72

If 80% of an item is $200.00 what is the original cost