Ask question

Ask question

All categories

3 years ago

6

PLEASE!!! HELP I AM BEGGING YOU THIS WOLD MEAN SO MUCH TO ME PLEASE SHOW YOUR WORK!

1 answer:

just olya [345]3 years ago

8 0

1) 5m^2 - 2mn + (12m + 9m) = 5m^2 - 2mn + 21m
2) 9x+ 16x - 10= 25x -10
3) (2x + 3x + 6x) + ( 5 - 2 + 20) = 11x + 23
4) - 2x^2 + ( 5x - x + 15x) + (7 + 10)= -2x^2 + 19x + 17

You might be interested in

Which expression is equivalent to a^7

DerKrebs [107]

Answer:

$\sqrt{a^{6} *a}$

Step-by-step explanation:

when multiplying exponents, as long as the base is the same, you add the power. $a^{6}*a^1=a^(6+1)=a^7$

3 0

2 years ago

kherson [118]

$\sf{\qquad\qquad\huge\underline{{\sf Answer}}}$

Here we go ~

take value of pi = 3

r = radius = 5 cm

h = height = 9 cm

Let's calculate volume of Cylinder ~

$\qquad \sf \dashrightarrow \:v = \pi {r}^{2} h$

$\qquad \sf \dashrightarrow \:v = 3 \times {5}^{2} \times 9$

$\qquad \sf \dashrightarrow \:v = 3\times25 \times 9$

$\qquad \sf \dashrightarrow \:v = 75 \times 9$

$\qquad \sf \dashrightarrow \:v =67 5 \: \: cm {}^{3}$

That's all, ask me if you have any queries ~

7 0

2 years ago

What are the factors of -12?

Alenkinab [10]

Answer:

− 12 , − 6 , − 4 , − 3, −2, −1, 1, 2, 3, 4, 6 , 12

Step-by-step explanation:

-12 * 1 = -12

-6 * 2 = -12

-4 * 3 = -12

-3 * 4 = -12

-2 * 6 = -12

-1 * 12 = -12

1 * -12 = -12

2 * -6 = -12

3 * -4 = -12

4 * -3 = -12

6 * -2 = -12

12 * -1 = -12

8 0

3 years ago

An automobile travels past the farmhouse at a speed of v = 45 km/h. How fast is the distance between the automobile and the farm

yulyashka [42]

Answer:

$\frac{ds}{dt} = 39.586 km/h$

Step-by-step explanation:

let distance between farmhouse and road is 2 km

From diagram given

p is the distance between road and past the intersection of highway

By using Pythagoras theorem

$s^2 = 2^2 +p^2$

differentiate wrt t

we get

$\frac{d}{dt} s^2 = \frac{d}{dt} (4 + p^2)$

$2s \frac{ds}{dt} =2p \frac{dp}{dt}$

$\frac{ds}{dt} = \frac{p}{s}\frac{dp}{dt}$

$\frac{ds}{dt} = \frac{p}{\sqrt{p^2 +4}} \frac{dp}{dt}$

putting p = 3.7 km

$\frac{ds}{dt} = \frac{3.7}{\sqrt{3.7^2 +4}} 45$

$\frac{ds}{dt} = 39.586 km/h$

3 0

4 years ago

Write the function f(x) = -4x2 + 24x - 42 in vertex form, and identify its vertex.

Vlad [161]

<u>ANSWER</u>

The vertex form is $f(x)=-4(x-3)^2-6$

<u>EXPLANATION</u>

We use completing squares

$f(x)=-4x^2+24x-42$

We factor -4 out of the first two terms

$f(x)=-4(x^2-6x)-42$

We add and subtract $-4(-3)^2$ , that is coming from, $(\frac{b}{2a})^2$ .

$f(x)=-4(x^2-6x)+ -4(-3)^2--4(-3)^2-42$

$f(x)=-4(x^2-6x+(-3)^2)--4(-3)^2-42$

The expression in the first parenthesis is now a perfect square.

$f(x)=-4(x-3)^2+36-42$

$f(x)=-4(x-3)^2-6$

The function is now in the form,

$f(x)=a(x-h)^2+k$ , where $V(h,k)$ is the vertex

Hence the vertex is $(3,-6)$

6 0

3 years ago

Read 2 more answers