Answer:
(x - 7)(x + 3) = 0
Step-by-step explanation:
To factorise the quadratic
Consider the factors of the constant term (- 21) which sum to give the coefficient of the x- term (- 4)
The factors are - 7 and + 3, since
- 7 × 3 = - 21 and - 7 + 3 = - 4, thus
(x - 7)(x + 3) = 0 ← in factored form
Each of the rectangles is equal to 30 square ft so 30 x 3 = 90 and each triangle is equal to 3 square ft so 90+ (3 x 2) = 96 sq. ft.
$1.20 3($1.20)
-------- * (3/4 lb) = ------------ = $0.90 (cost of 3/4 lb of apples)
1 lb 4 lb
Answer:
The correct answer is c. 13/3
Step-by-step explanation:
In order to find this, we put -2/3 in for each x that we see and evaluate.
f(x) = 3x^2 - 6x - 1
f(-2/3) = 3(-2/3)^2 - 6(-2/3) - 1
f(-2/3) = 3(4/9) + 4 - 1
f(-2/3) = 4/3 + 3
f(-2/3) = 13/3
X < z + y
we have to get x by itself so we need to get rid of the -y. add y to both sides. -y and +y cancel each other out on the left side