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2 years ago

Please help me asap!

Mathematics

1 answer:

bazaltina [42]2 years ago

7 0

Answer:

Value of A is -1

Value of B is 1

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Unit rate for typing 34 words in a minute in a half

katrin [286]

Answer:

Rate is 1.1333 words per second 

Step-by-step explanation:

We understand rating as frequency or speed of doing something per time (seconds mainly)

${ \green{ \tt{rate = \frac{item \: quantity}{time} }}} \\$

Let's find rate in terms of seconds (words per second)

${ \rm{rate = \frac{34 \: words}{ (\frac{1}{2} \times 60) \: seconds} }} \\ \\ { \rm{rate = \frac{34}{30} }} \\ \\ { \rm{rate = 1.133 \: \: words \: per \: second}}$

6 0

1 year ago

117 over 200 as a percent

Natasha_Volkova [10]

117 times 100 11700 then divide by 200 which is 58.5 %

6 0

3 years ago

A ball is thrown downward from a cliff. Its position at time t seconds is given by the formula s(t) = 16t2 + 32t, where s is in

Rom4ik [11]

Answer:

It takes 2.8 seconds for the ball to fall 215 ft.

Step-by-step explanation:

We are given a position function s(t) where s stands for the number of feet the ball has fallen, so we have to replace s with the given value of 215 ft and solve for the time t.

Setting up the equation.

The motion equation is given by

$s(t) =16t^2+32t$

We can replace there s = 215 ft to get

$215=16t^2+32t$

Solving for the time t.

From the previous equation we can move all terms in one side to get

$16t^2+32t-215=0$

At this point we can solve for t using quadratic formula.

$t = \cfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

where a, b and c are the coefficients of the quadratic equation

$at^2+bt+c=0$

So we get

$a=16\\b=32\\c=-215$

Replacing on the quadratic formula we get

$t = \cfrac{-32\pm \sqrt{32^2-4(16)(-215)}}{2(16)}$

Using a calculator we get

$t=-4.8 , t = 2.8$

Physically speaking the only result that makes sense is to move forward in time that give us t = 2.8 seconds.

We can conclude that it takes 2.8 seconds for the ball to fall 215 ft.

3 0

3 years ago

A bridge is built in the shape of a semielliptical arch. The bridge has a span of 60 feet and a maximum height of 10 feet. Choos

Dennis_Churaev [7]

Is there a way you can send me a picture of what your copying your answer from ?

6 0

3 years ago

Combining probabilities is a function of _____.

Romashka-Z-Leto [24]

I think the correct answer from the choices listed above is the second option. Combining probabilities is a function of mutually exclusive events. Joint probability is a measure of two events happening at the same time, and can only be applied to situations where more than one observation can be occurred at the same time.

7 0

3 years ago

Read 2 more answers