3 years ago

Write down the rules for multiplication and division of whole numbers

1 answer:

8 0

As division is the inverse of multiplication, the rules for division are the same as the rules for multiplication. So when multiplying and dividing positive and negative numbers remember this: If the signs are the same the answer is positive, if the signs are different the answer is negative.

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An archers arrow follows a parabolic path. The height of the f(x) is given by f(x) =-16x^2+200x+4 in feet. Find the maximum heig

diamong [38]

Maximum of function $f(x)=ax^2+bx+c$ where $a \neq 0$ you can find by using this formula: $y_{\max}= - \dfrac{\Delta}{4a}=-\dfrac{b^2-4ac}{4a}=\dfrac{4ac-b^2}{4a}=c-\dfrac{b^2}{4a}$

In height function you've got:

a= -16
b= 200
c= 4

Just substitute! You'll get

$y_{\max} = 4 - \dfrac{200^2}{4 \cdot (-16)}=4-\dfrac{40 \ 000}{-64}=4+\dfrac{40 \ 000}{64}=4+625=629$

Maximum height is 629 [units]

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3 years ago

Question 19

Otrada [13]

Answer:

The slope is -1/3

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4 years ago

8 is what percent of 25

Anon25 [30]

Answer:

Step-by-step explanation: