3 years ago

What is (7x-2y)(3x+5y)

Mathematics

1 answer:

Ymorist [56]3 years ago

7 0

(7x - 2y) (3x +5y) ( First open brackets)

= 21x² + 35xy - 6xy - 10y² ( solve like terms)

= 21 x² - 10y² + 29xy.

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A baseball is thrown at an angle of 30° with respect to the ground and it reaches the ground in 2 seconds. What is its initial v

NeTakaya

Answer:

The answer to your question is vo = 19.62 m/s

Step-by-step explanation:

Data

angle = α = 30°

time = t = 2 s

vo = ?

g = 9.81 m/s²

Formula

$t = \frac{2vosin\alpha}{g}$

Solve for vo

$vo = \frac{tg}{2sin\alpha}$

Substitution

$vo = \frac{(2)((9.81)}{2sin 30}$

Simplification

$vo = \frac{19.62}{2(0.5)}$

$vo = \frac{19.62}{1}$

Result

vo = 19.62 m/s

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