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3 years ago

Help me solve this equation please. y/9 + 5 = 0

Mathematics

2 answers:

Tresset [83]3 years ago

8 0

y/9 +5 =0

subtract 5 from each side

y/9 = -5

multiply both sides by 9

y = -5 * 9

y = -45

ira [324]3 years ago

7 0

Multiply all 3 terms by 9 to remove the fraction 1/9:

y + 45 = 0. Then y = -45.

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This week there are 144 members at the meeting, which is 90% of the total group. What is the total number of green team members

irina1246 [14]

Answer:

The total number of Green team members is 160.

Step-by-step explanation:

Given 90% of the total members present at the meeting which is 144.

Let the total number of members be x.

$90\%\ of x=144\\\frac{90\times\ x}{100}=144\\9x=1440\\x=\frac{1440}{9}=160$

Hence we can say that, The total number of Green team members is 160.

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3 years ago

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3 years ago

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Y varies directly with x. When x is 4 y is 8. Find y when x = 10.

grandymaker [24]

Step-by-step explanation:

y = 4 when x = 8 So, 4 = 8k

k = 1/2

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2 years ago

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Kazeer [188]

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3 years ago

Which equation represents the hyperbola in general form?

valina [46]

ANSWER

$9 {y}^{2} - 4 {x}^{2}- 36y + 16x - 16 = 0$

EXPLANATION

The standard equation of the hyperbola is

$\frac{ {(y - 2)}^{2} }{4} - \frac{ {(x - 2)}^{2} }{9} = 1$

We multiply through by 36 to obtain:

$9 {(y - 2)}^{2} - 4( {x - 2)}^{2} = 36$

We now expand to get,

$9( {y}^{2} - 4y + 4) - 4( {x}^{2} - 4x + 4) = 36$

Expand :

$9 {y}^{2} - 36y + 36 - 4 {x}^{2} + 16x - 16 = 36$

To get the general form, we equate everything to zero to get,

$9 {y}^{2} - 4 {x}^{2}- 36y + 16x - 16 = 0$

The correct choice is D.

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3 years ago