3 years ago

Find the number that should be added to the expression to make it a perfect square. k^2-5k

Mathematics

1 answer:

yuradex [85]3 years ago

6 0

(K-5/2)^2-25/4 is your answer

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Round your answer to the nearest hundredth. с B 40° ? 7 А

igor_vitrenko [27]

Answer:

take 40 degree as reference angle

using sine rule

let opposite be x

sine 40=opposite/hypotenuse

0.64=x/7

0.64*7=x

4.48=x

Step-by-step explanation:

3 0

3 years ago

What is the area of triangle DEF?

FrozenT [24]

Answer:

$A=2\sqrt{14}\ units^2$

Step-by-step explanation:

we know that

Heron's Formula is a method for calculating the area of a triangle when you know the lengths of all three sides.

$A=\sqrt{s(s-a)(s-b)(s-c)}$

where

a, b and c are the length sides of triangle

s is the semi-perimeter of triangle

we have

$a=5\ units,b=6\ units,c=3\ units$

Find the semi-perimeter s

s= $\frac{5+6+3}{2}=7\ units$

Find the area of triangle

$A=\sqrt{7(7-5)(7-6)(7-3)}$

$A=\sqrt{7(2)(1)(4)}$

$A=\sqrt{56}\ units^2$

simplify

$A=2\sqrt{14}\ units^2$

3 0

2 years ago

Today, Heather is 9 years and 3 months old, How old was she 2 years and 6 months ago?

wlad13 [49]

Heather will be 6 and 7 months old

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3 years ago

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3 1/2 + 2 5/6 show me the work please

Zolol [24]

3 1/4 + 2 1/3
= 6712
= 5712≅ 5.583333
this example do it using this example

8 0

3 years ago

To estimate his travel time, Joe divides the distance, d, in miles by 5 less than his expected average speed, in miles per hour.

jenyasd209 [6]

310 / 75-5 = 4.42 or 4.4 hours. Let me know if you have any other questions.

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3 years ago

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