All categories

3 years ago

HELP TIMED BRAINLIST

Mathematics

2 answers:

Charra [1.4K]3 years ago

6 0

I believe it would be the third option

stiks02 [169]3 years ago

5 0

Answer:

Step-by-step explanation:

have a great day!

You might be interested in

Please help 100 points

iren2701 [21]

Here's a trick.

Don't solve all the equations, you're given the answer to x so just substitute.

5/2*8+7/2=3/4*8+14

23.5=20 INCORRECT

5/4*8-9=3/2*8-21

1=-9 INCORRECT

5/4*8-2=3/2*8-4 <- YOUR ANSWER

8=8 CORRECT

3 0

4 years ago

Read 2 more answers

3x=9y find slope and intercept

miv72 [106K]

Slope = ⅓
y-intercept = 0
x-intercept = 0

7 0

3 years ago

Subtract 98.03 – 7.675<br> a) 21.28<br> b) 90.355<br> c) 91.672<br> d)21.22

Alex

Answer:

90.335

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Order the group of parabolas from widest to narrowest.

Mamont248 [21]

Answer:

$\large\boxed{y=\dfrac{1}{4}x^2,\ y=-\dfrac{1}{2}x^2,\ y=\dfrac{3}{2}x^2}$

Step-by-step explanation:

The equation of a parabola: y = ax²

The larger the value of |a|, the narrower the parabola.

We have the following coefficients a:

$\left|\dfrac{1}{4}\right|=\dfrac{1}{4},\ \left|-\dfrac{1}{2}\right|=\dfrac{1}{2},\ \left|\dfrac{3}{2}\right|=\dfrac{3}{2},$

We arrange the coefficients from the smallest to the largest:

$\dfrac{1}{4}\$

Therefore you have the answer:

$y=\dfrac{1}{4}x^2,\ y=-\dfrac{1}{2}x^2,\ y=\dfrac{3}{2}x^2$

6 0

3 years ago

<img src="https://tex.z-dn.net/?f=%20a%20%3D%20%5Cfrac%7B%20%7B%28x%20%2B%202%29%7D%5E%7B2%7D%20-%20%7B%282x%20-%203%29%7D%5E%7B

xxMikexx [17]

Answer:

$a=3x-1$

Step-by-step explanation:

Given:

$a=\dfrac{(x+2)^2-(2x-3)^2}{-x+5}$

Use formulas

$(u+v)^2=u^2+2uv+v^2\\ \\(u-v)^2=u^2-2uv+v^2$

Therefore,

$(x+2)^2=x^2+2\cdot x\cdot 2+2^2=x^2+4x+4\\ \\(2x-3)^2=(2x)^2-2\cdot (2x)\cdot 3+3^2=4x^2-12x+9$

Now

$(x+2)^2-(2x-3)^2\\ \\=x^2+4x+4-(4x^2-12x+9)\\ \\=x^2+4x+4-4x^2+12x-9\\ \\=-3x^2+16x-5$

Factor it:

$-3x^2+16x-5\\ \\=-3x^2+15x+x-5\\ \\=-3x(x-5)+(x-5)\\ \\=(x-5)(-3x+1)$

Hence, the fraction can be simplified as follows:

$a=\dfrac{(x-5)(-3x+1)}{-x+5}\\ \\a=\dfrac{(x-5)(-3x+1)}{-(x-5)}\\ \\a=\dfrac{-3x+1}{-1}\\ \\a=3x-1$

8 0

3 years ago