2 years ago

−k+2(−2k−5) Simplify Will give brainliest

Mathematics

1 answer:

Elan Coil [88]2 years ago

8 0

Answer:-k+-4k-10; which is -5k-10

Step-by-step explanation:

first distribute.

then add.

done.

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During a construction project, heavy rain filled construction cones with water. The diameter of a cone is 12 in. and the height

sergey [27]

Volume of a cone = πr^2(h/3)
r=6
h=27

v = π(6^2)27/3
v = π (36)(9)

v=π324 in. cubed
or
v=1,017.36 in. cubed

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3 years ago

Writer y=3/4x+8 in standard form

Harman [31]

Answer:

3x - 4y = -32

Step-by-step explanation:

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3 years ago

Armand ran the 100 yard dash in 17.18 seconds. Arturo's time has an 8 with a value 10 times the value of the 8 in Armand's time.

frosja888 [35]

8====D

He has a value of 64

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3 years ago

2x² - 5x+1 has roots alpha and beta. Find alpha⁴+beta⁴ without solving the equation.

shepuryov [24]

Answer:

Step-by-step explanation:

$\alpha+\beta=\dfrac{5}{2} \\\\\alpha*\beta=\dfrac{1}{2} \\\\\alpha^2+\beta^2=\dfrac{21}{4} \ (see\ previous\ post)\\\\(\alpha+\beta)^4=\dfrac{625}{16} \\\\=\alpha^4+\beta^4+4*\alpha^3*\beta+6*\alpha^2*\beta^2+4*\alpha*\beta^3\\\\=\alpha^4+\beta^4+4*(\alpha*\beta)(\alpha^2+\beta^2)+6*\alpha^2*\beta^2\\\\\alpha^4+\beta^4=(\alpha+\beta)^4-4*(\alpha*\beta)(\alpha^2+\beta^2)-6*\alpha^2*\beta^2\\\\= \dfrac{625}{16} -4*\dfrac{1}{2} *\dfrac{21}{4} -6*(\dfrac{1}{2})^2 \\\\$

$= \dfrac{625}{16}- \dfrac{168}{16}-\dfrac{24}{16}\\\\\\= \dfrac{433}{16}$

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2 years ago

Find two numbers whose sum is 55 and whose product is 646

Svet_ta [14]

Answer:

17 and 38

Step-by-step explanation:

x + y = 55......x = 55 - y

x * y = 646

y(55 - y) = 646

55y - y^2 = 646

y^2 - 55y + 646 = 0

(y - 17)(y - 38) = 0

y - 17 = 0 y - 38 = 0

y = 17 y = 38

ur numbers are 17 and 38

8 0

2 years ago