All categories

3 years ago

I need help finding my variable

Mathematics

2 answers:

Oksi-84 [34.3K]3 years ago

8 0

The length is two times its width, and the perimeter equals 24.

All the sides added up equal 24.

4 and 8 could be the width and the length of the rectangle.

4*2= 8 and

4+4+8+8= 24

width= 4 length= 8

I hope this helps!
~kaikers

Viefleur [7K]3 years ago

3 0

So the length is 2 times the width, which means you double the length when adding. To find the perimeter of a rectangle, you add the sides.

l= length= 2w
w= width

l + w= 24
Substitute in the same variable as width
2w+w=24
3w=24
Divide both sides by 3
w=8 width

2w= 2(8)= 16 = length

Hope this helps!! :)

You might be interested in

Use the interactive ruler to measure the distance from the center of dilation, C, to the image and pre-image. The distance from

inna [77]

the answer is : 4, 2, one-half.

7 0

3 years ago

Read 2 more answers

Determine whether the data described are qualitative or quantitative:The weights of subjects in a clinical trial of a new drug.

Lynna [10]

Answer:

It is quantitative because they are looking at the weights which are numbers.

3 0

2 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

2 years ago

When the outliers are removed, how does the mean change? (2 points)

quester [9]

Answer:

Option 3: mean increases by 3

Step-by-step explanation:

Current mean:

[50+76+78+2(79)+80+81+2(82)+83] ÷ 10

= 77

Without the outliers:

[76+78+2(79)+80+81+2(82)+83] ÷ 9

= 80

80 - 77 = 3 (increase)

5 0

3 years ago

If f(x) varies directly with x, and f(x) = 12 when x = 8, write the direct linear variation equation.

Feliz [49]

<span>f(x) varies directly with x.
f(x) = kx (k is the constant of proportionality)
if x = 8,
12 = 8 k
k = 12/8
k = 3/2
So the equation would be:
f(x) = (3/2)x
</span><span>
</span>

4 0

3 years ago