All categories

3 years ago

Y varies directly as x such that when x = -52, y = -39. When y = 34.5, what is the value of x?

Mathematics

2 answers:

Paul [167]3 years ago

8 0

Answer:

Step-by-step explanation:

hgf

Whitepunk [10]3 years ago

7 0

Answer:

Step-by-step explanation:

In the attached file

You might be interested in

Please help! The question is on top

Sholpan [36]

Are you asking for the answer ? Or a example

5 0

3 years ago

In a triangle ABC, measure of angle B is 90 degrees. AB is 3x-2 units and BC is x+3. If the area of the triangle is 17 sq cm, fo

Scorpion4ik [409]

Answer:

$x=\frac{8}{3}\ cm$

Step-by-step explanation:

we know that

The area of the right triangle ABC is equal to

$A=\frac{1}{2}(AB)(BC)$

we have

$A=17\ cm^2$

$AB=(3x-2)\ cm$

$BC=(x+3)\ cm$

substitute the values

$17=\frac{1}{2}(3x-2)(x+3)$

$34=(3x-2)(x+3)$

$34=3x^2+9x-2x-6$

$3x^2+7x-6-34=0$

$3x^2+7x-40=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$3x^2+7x-40=0$

$a=3\\b=7\\c=-40$

substitute in the formula

$x=\frac{-7(+/-)\sqrt{7^{2}-4(3)(-40)}} {2(3)}$

$x=\frac{-7(+/-)\sqrt{529}} {6}$

$x=\frac{-7(+/-)23} {6}$

$x=\frac{-7(+)23} {6}=\frac{16}{6}=\frac{8}{3}$

$x=\frac{-7(-)23} {6}=-5$

therefore

The solution is

$x=\frac{8}{3}\ cm$

6 0

3 years ago

42minutes:5hours in ratio form

TiliK225 [7]

Answer:

31:150

Step-by-step explanation:

First of all we convert the hours into minutes:

5×60=300

which gets us 42:300, which we can simplify to:

31:150

and is 31 is prime and 150 can't be divided into it without a remainder, it is in it's simplest form and it is the answer.

8 0

3 years ago

Read 2 more answers

Find the missing angle. Find x

dolphi86 [110]

Answer: 20

Reason: They're opposite meaning they are the same when compared to the side

3 0

3 years ago

Factorise the following. x²-4

slava [35]

(x-2)(x+2) is factorize is given eq

7 0

3 years ago