Answer:
Step-by-step explanation:
y=4x^2-7
vertex(0,-7)
Answer:
147
Step-by-step explanation:
x = 7,
3x² = 3 × 7²
= 3 × 49
= 147
Use long addition to evaluate: the answer is 18
We are given

we know that

so, we get
opposite =7
adjacent=24
now, we can find hypotenuse


now, we can draw triangle and then switch vertices accordingly
we can find cos(B) using second triangle

In second triangle:
adjacent=7
hypotenuse =25
so, we get
................Answer
X(x+3)-7(x+3)
x2+3x-7x-21
x^2-4x-21