3 years ago

I don't understand pls help

1 answer:

3 0

Twilight was liked by half the class because if you add up the number of students you get 24 and half of 24 is 12
(Hope this helped)

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Can someone please help me to solve 3/4 problems pls i will mark you the brainly pls I need help

Gennadij [26K]

Answer:

3. x = 11.6

4. f = 2 g = 2

Step-by-step explanation:

3) (3x - 7) + (4x + 6) = 90 --> x = 11.6

4) 3f + 1 = 5f - 15 ---> f = 2

6g - 5 = 3f + 1

6g = 3(2) + 6 ---> g = 2

8 0

3 years ago

if y varies inversely as x and y = 194 when x = -13, find y when x = 50. Round your answer to the nearest hundredth, if necessar

pashok25 [27]

Step-by-step explanation:

Since, y varies inversely as x.

$\therefore \: y = \frac{k}{x} \\ (k = constant \: of \: proportionality) \\ \therefore \: xy = k...(1) \\ plug \: y = 194 \: \: and \: \: x = - 13 \: in \: (1) \\ \therefore \: - 13 \times 194= k \\ \therefore \: k = - 2522 \\ substituting \: k = - 2522 \: in \: (1) \\ xy = - 2522...(2) \\ this \: is \: equation \: of \: variation. \\ plug \: x = 50 \: in \: (2) \\ 50 \times y = - 2522 \\ \therefore \:y = \frac{ - 2522}{50} \\ \huge \red{ \boxed{\therefore \:y = - 50.44}}$