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3 years ago

10

Suppose that x and y vary inversely and x = 1 when y =5. Write a function that models the inverse variation Graph the function a

nd find y when x = 20

1 answer:

Vaselesa [24]3 years ago

3 0

The answer is a function

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kifflom [539]

$\\ \sf\longmapsto \dfrac{x^2-1}{x^2+5x+4}\leqslant 0$

Solving denominator

$\\ \sf\longmapsto x^2+5x+4>0$

$\\ \sf\longmapsto x^2+4x+x+4>0$

$\\ \sf\longmapsto x(x+4)+1(x+4)>0$

$\\ \sf\longmapsto (x+4)(x+1)>0$

$\\ \sf\longmapsto x>-4\:or x>-1$

Hence x $\neq$ -1
x can't be 0 as it makes function undefined

$\\ \sf\longmapsto -4$

5 0

3 years ago

PLEASE PLEASE PLEASSE HELP I WILL MARK BRAINLIEST!!! FIRST TO GIVE A PROPER ANSWER WILL GET BRAINLIEST

juin [17]

Answer:

Answer to 9 is B answer to 10 is C

Step-by-step explanation:

Please give brainliest

7 0

3 years ago

What is the prime factorization of 121?

Diano4ka-milaya [45]

121|11
11|11
1

$121=11^2$

3 0

3 years ago

The Mendes family bought a new house 8 years ago $129,000. The new house is now worth $186,000. Assuming a steady rate of growth

USPshnik [31]

So assuming simplet interest

find the change to find the interest
change=186000-129000=57000

simple interest=time times rate times principal
time is in years (8)
rate is in decimal
principal is amount invested (129000)

so
interest is 57000
57000=(8)(r)(129000)
57000=1032000r
divide both sides by 1032000
0.05523255813953488372093023255814=r
or
5.523255813953488372093023255814%
rounded
5.5%

3 0

4 years ago

Jim’s allowance is $1.20 per week. Stan’s is 25¢ per day. How long will they have to

algol [13]

First, find out how much stan gets per week.

.25 x 7 =1.75

now how much they get together

1.75 + 1.20 = 2.95

and then the final step

23.60 / 2.95 = 8

it'll take 8 weeks for them to buy the model car set

7 0

3 years ago