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3 years ago

suppose x and y vary inversely and y=10 when x=4. write a function that models the variation then find y when x =90

Mathematics

1 answer:

ankoles [38]3 years ago

4 0

X = k/y
4 = k/10
k = 4 x 10 = 40
Thus, x = 40 / y

90 = 40 / y
y = 40/90 = 4/9

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WHICH ONE IS A COMPOSITE NUMBER I NEED AN ANSWER RIGHT NOW THIS IS DUE IN 5 MINUTES

-BARSIC- [3]

Answer:21

Step-by-step explanation:

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3 0

3 years ago

Gavin and Jim win some money and share it in the ratio 5:2. Gavin gets £39 more than Jim. How much did they get altogether?

gregori [183]

Answer:

Altogether Gavin and Jim won £95.

Step-by-step explanation:

We are given the following in the question:

Ratio of money won by Gavin and Jim = 5:2

Gavin gets £39 more than Jim.

Let x be the amount of money Won by Jim.

Then, money won by Gavin =

$=(x+39)$

Thus, we can write the equation:

$\dfrac{\text{Gavin}}{\text{Jim}} = \dfrac{5}{2}=\dfrac{x+39}{x}$

Solving, we get,

$\dfrac{5}{2}=\dfrac{x+39}{x}\\\\5x = 2x + 78\\\Rightarrow 3x = 78\\\Rightarrow x = 26\\\Rightarrow (x+39) = 65$

Thus, Gavin won £65 and Jim won £26.

Money won altogether =

$=65 + 26\\=95$

Thus, altogether Gavin and Jim won £95.

5 0

3 years ago

Cate muchii are un cilindru?

fenix001 [56]

2.............................................

5 0

4 years ago

I need help.............

Radda [10]

Answer:

Step-by-step explanation:

When you rearrange the equation, it would be y = 2x+1

If the y intercept is 1, and the slope is 2, then well c would uh work.

5 0

3 years ago

James purchased 2 T-shirts and a pair of jeans online and paid $80 for his purchase. The next week, the same site was offering a

Maurinko [17]

2t + j = 80
3(0.5)t + 2(0.5)j = 70

j = 80 - 2t
1.5t + j = 70
1.5t + 80 - 2t = 70
-0.5t = 70 - 80
-0.5t = -10
t = -10/-0.5
t = 20

j = 80 - 2t
j = 80 - 2(20)
j = 80 - 40
j = 40

so ur answer is C

6 0

3 years ago