All categories

3 years ago

HELP HELP! I need help aswering the qustions listed below!?! plz!

Mathematics

2 answers:

Anuta_ua [19.1K]3 years ago

7 0

1 B 28 is not divisible by 3

2. C 12 is divisible by 12

3. 5 is the greatest common factor

4. 23 is prime

5. 47 is prime

6 4 is the greatest common factor

miv72 [106K]3 years ago

4 0

1) B.28

2)C.12

3)5

4)23

5)47

6)4

You might be interested in

Solve (x + 3)2 + (x + 3) – 2 = 0. Let u = Rewrite the equation in terms of u. (u2 + 3) + u – 2 = 0 u2 + u – 2 = 0 (u2 + 9) + u –

Verdich [7]

Answer:

The solutions of the original equation are x=-5 and x=-2

Step-by-step explanation:

we have

$(x+3)^2+(x+3)-2=0$

Let

$u=(x+3)$

Rewrite the equation

$(u)^2+(u)-2=0$

Complete the square

$u^2+u=2$

$u^2+u+1/4=2+1/4$

$u^2+u+1/4=9/4$

rewrite as perfect squares

$(u+1/2)^2=9/4$

square root both sides

$(u+1/2)=\pm\frac{3}{2}$

$u=(-1/2)\pm\frac{3}{2}$

$u=(-1/2)+\frac{3}{2}=1$

$u=(-1/2)-\frac{3}{2}=-2$

the solutions are

u=-2,u=1

Alternative Method

The formula to solve a quadratic equation of the form

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

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$(u)^2+(u)-2=0$

$a=1\\b=1\\c=-2$

substitute in the formula

$u=\frac{-1\pm\sqrt{1^{2}-4(1)(-2)}} {2(1)}$

$u=\frac{-1\pm\sqrt{9}} {2}$

$u=\frac{-1\pm3} {2}$

$u=\frac{-1+3} {2}=1$

$u=\frac{-1-3} {2}=-2$

the solutions are

u=-2,u=1

Find the solutions of the original equation

For u=-2

$-2=(x+3)$ ----> $x=-2-3=-5$

For u=1

$1=(x+3)$ ----> $x=1-3=-2$

therefore

The solutions of the original equation are

x=-5 and x=-2

4 0

3 years ago

Read 2 more answers

IS ANYBODY GOOD IN MATH

topjm [15]

No i am horrible in it and everytime i come to ask questions nobody helps :(

6 0

2 years ago

Read 2 more answers

A reasonable estimate of the

lyudmila [28]

Answer:

Step-by-step explanation:

6 0

2 years ago

If EF = 6 and EG = 21, find the value of FG. The drawing is not to scale.

insens350 [35]

EF = 6

EG = 21

You would subtract EF from EG to find FG:

21 - 6 = 15.

The answer is B.) 15

7 0

3 years ago

Y=1/2x-3 and 9x-2y=-74 substitution

Luba_88 [7]

x=2(y+3)x=92(y−37)

5 0

3 years ago

Read 2 more answers