All categories

4 years ago

Is this correct or no?

Mathematics

2 answers:

Vikentia [17]4 years ago

8 0

Answer: The steps are not correct in several places. The correct result is "x > 2"

Explanation:

First row: they multiply both sides by 2, but on the right hand side the multiplication should act on the entire term "(3-2x)" so 2(3-2x)=6-4x

Second row should be now: 3x-8 > 6-4x | now adding 8 to both sides:

Third row should look like this : 3x > 14 - 4x

Fourth row: we want to bring the term 4x to the left so it should be something like this:

3x > 14 - 4x | add "4x" to both sides

which results in

3x + 4x > 14 - 4x + 4x

7 x > 14 | divide both sides by 7

x > 14/7

x > 2

Let me know if you have questions

Tanya [424]4 years ago

4 0

Yes.??? dont really Know sorry

You might be interested in

The solution set of the equation Ix-1I=3 is

vladimir2022 [97]

Answer:

x = - 2 or x = 4

Step-by-step explanation:

the expression inside the absolute value can be positive or negative

Removing the bars and solve x - 1 = ± 3

x - 1 = - 3 or x - 1 = 3

x - 1 = - 3 ( add 1 to both sides ) ⇒ x = - 2

x - 1 = 3 ( add 1 to both sides ) ⇒ x = 4

7 0

3 years ago

Calculate the ratio to the nearest hundredth (Please do them all for me)<br>PLEASE!

earnstyle [38]

All of them are 3.14

I got them all right on I ready :)))

8 0

3 years ago

Mrs. Williams needed to make 4 1/2 of fruit salad for a class party.

ziro4ka [17]

Answer:

strawberry=7/8

Step-by-step explanation:

treat strawberry as x

add on proportions

1 1/8+ 3/4+ 1 3/4 + x = 4 1/2

(9+6+14)/8 + x = 9/2

29/8 +x = 9/2

x= 9/2 - 29/8

x= (36-29)/8

x=7/8

3 0

3 years ago

Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of

Maru [420]

Parameterize $S{/tex] by[tex]\vec s(u,v)=u\,\vec\imath+v\,\vec\jmath+(8-u^2-v^2)\,\vec k$

with $0\le u\le1$ and $0\le v\le1$ .

Take the normal vector to $S$ to be

$\vec s_u\times\vec s_v=2u\,\vec\imath+2v\,\vec\jmath+\vec k$

Then the flux of $\vec F$ across $S$ is

$\displaystyle\iint_S\vec F\cdot\mathrm d\vec S=\int_0^1\int_0^1\vec F(x(u,v),y(u,v),z(u,v))\cdot(\vec s_u\times\vec s_v)\,\mathrm du\,\mathrm dv$

$=\displaystyle\int_0^1\int_0^1(uv\,\vec\imath+v(8-u^2-v^2)\,\vec\jmath+u(8-u^2-v^2)\,\vec k)\cdot(2u\,\vec\imath+2v\,\vec\jmath+\vec k)\,\mathrm du\,\mathrm dv$

$=\displaystyle\int_0^1\int_0^1\bigg(2u^2v+(u+2v^2)(8-u^2-v^2)\bigg)\,\mathrm du\,\mathrm dv=\boxed{\frac{1553}{180}}$

6 0

3 years ago

1. algebraic expression

Ronch [10]

3. constant - D. a numerical value
2. coefficient - A. the constant preceding the variables in a product
4. expression -E. a mathematical phrase....
5. variable - B. a letter... representing an unkown
1. algebraic expression - C. a mathematical expression...

hope this helps

6 0

3 years ago