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2 years ago

Work out the lengths of sides a and b. Give your answers to 1 decimals place. (Pythagoras theoram

Mathematics

1 answer:

Simora [160]2 years ago

8 0

Step-by-step explanation:

h²=o²+a²

a²=8²+5²

a²=64+25

a²=89

a=√89

a=9.433

To one decimal place it is 9.4

for b,

h²=o²+a²

17²=b²+12²

289=b²+144

289-144=b²

145=b²

b=√145

b=12.041

To one decimal place it is 12.0

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Sam is an accountant. He finds that he spends two-fifths of his work day answering emails. If he kept 3.6 hours answering emails

Yanka [14]

Divide it into one piece so 3.6 / 2 = 1.8 then times that by the number of pieces you want so 3.6 / 2 * 5 = 9

3 0

3 years ago

Read 2 more answers

Plz need help ASAP

ohaa [14]

Answer:

The first one is binomial

Second one is trinomial

Third one should be binomial

Step-by-step explanation:

1. 2x + 3y = binomial

2. 4a + b + 3c = trinomial

3. 11d - 7e = binomial

(Hope this is right)

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3 years ago

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A group of students at a high school took a standardized test. The number of students who

Nataly_w [17]

Answer: provided in the explanation section

Step-by-step explanation:

This is quite simple to analyze.

we have that:

P (passed ) = 27/63 = 3/7

P (passed/Underclassman ) = 15 / 35 = 3/7

Since P (passed) = P(passed/underclassman) = 3/7

⇒ The two events are equal, hence independent.

cheers i hope this helped!!!!1

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3 years ago

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ball is thrown 40 meters above ground. the height of the ball from the ground level after t seconds is defined by using the func

padilas [110]

Answer:

<em>The ball will take 8.90 seconds to hit the ground.</em>

Step-by-step explanation:

The height of a ball after t seconds is given by:

$h(t)=40t-5t^2$

Determine how long will the ball take to hit ground level. Since the gound is 40 meters below the throwing point:

$40t-5t^2=-40$

Rearranging:

$5t^2-40t-40=0$

Simplifying by 5:

$t^2-8t-8=0$

Solving the quadratic equation with the formula:

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

With a=1, b=-8, c=-8

$\displaystyle t=\frac{8\pm \sqrt{64+32}}{2}$

$\displaystyle t=\frac{8\pm \sqrt{96}}{2}$

There are two solutions:

t=8.90 sec, t=-0.90 sec

Due to the nature of the problem, t cannot be negative, thus:

The ball will take 8.90 seconds to hit the ground.

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2 years ago

If Sara works for 7.25 an hour and works from 4-8 for a week what is her total amount for that week (week as in a whole 7days)

Elodia [21]

From 4-8 is 4 hours a day. You need to know how many hours that is total. (4 hours a day x 7 days a week). Then multiply the amount she gets per hour.

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3 years ago