3 years ago

Christina scored a certain number of goals, g, during a soccer season. Sarah scored twice as many goals during the same season.

Mathematics

1 answer:

Norma-Jean [14]3 years ago

6 0

S=2g or y=2x because you are multiplying Christina score by two to get Sarah's score.

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For what value of k are the roots of the quadratic equation kx (x-2)+6=0 equal?

ser-zykov [4K]

Answer:

$\boxed{\sf k=6}$

Step-by-step explanation:

$\sf kx (x-2)+6=0$

Expand brackets.

$\sf kx^2 -2kx+6=0$

This is in quadratic form.

$\sf ax^2 +bx+c=0$

Since this is for equal roots:

$\sf b^2 -4ac=0$

$\sf a=k\\b=-2k\\c=6$

$\sf (-2k)^2 -4(k)(6)=0$

$\sf 4k^2-24k=0$

$\sf 4k(k-6)=0$

$\sf 4k=0\\k=0$

$\sf k-6=0\\k=6$

Plug k as 0 to check.

$\sf \sf 0x^2 -2(0)x+6=0\\6=0$

False.

So that means k must equal 6.

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3 years ago

Find the value of x. Round to the nearest tenth.

goblinko [34]

Answer:

19.7

Step-by-step explanation:

37-17.3=19.7 which would be the value of x

4 0

2 years ago

Evaluate 2b^3 where b = 3

densk [106]

Answer:

Answer=54

Step-by-step explanation:

Given:- b=3

2b³

Solution:-

2 x b³

2 x 3 x 3 x 3

6 x 9

54 (answer)

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2 years ago

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A group of students were doing a science experiment in which they measured wind speed and temperature. The first day the wind sp

Mama L [17]

So the difference of speed will be 25-17 = 8 mph the last one choice

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3 years ago

Carols flower bed is a rectangle that is 10 feet long and 6 feet wide she wants to cut scale the same but make the length of 4 f

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Answer:

Carol can't do that because 10 x (6-4)= 20, not 60, the original area.

(2)

Step-by-step explanation:

10 x 6 = 60, while 10 x 2 = 20 (6-4=2)

Hope this helped!

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3 years ago

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