Answer:
Clark can type 40 words in one minute
Step-by-step explanation:
- Set up a proportion:
- Cross multiply, then divide: 720 × 1 = 720, 720 ÷ 18 = 40
- So, x = 40
I hope this helps!
A coin is tossed 10 times. Find the chance of getting exactly 5 heads. Find the chance of obtaining between four and six heads i
1 answer:
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Answer:
Step-by-step explanation:
Given
← factorise numerator and denominator
2x² - 18 ( factor out 2 from each term )
= 2(x² - 9) ← difference of 2 squares
= 2(x - 3)(x + 3)
and
x² + 4x - 21 = (x + 7)(x - 3) , then
= ← cancel common factor (x - 3) on numerator/ denominator
=
Answer:
The vertex form of a quadratic function:
(h,k) - the coordinates of the vertex
If a>0, then the parabola opens upwards, so the vertex is the minimum of the function.
If a<0, then the parabola opens downwards, so the vertex is the maximum of the function.
