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3 years ago

Ibb this is for u ahahhah

Mathematics

1 answer:

nexus9112 [7]3 years ago

6 0

Volume = 3ash

V = 3 × 2.6 × 6 × 3

V = 140.4cm³

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In the sequence, 2, 5, 8, 11, …, which expression describes the number

frez [133]

Answer:

the first one x+3 is the right answer

3 0

4 years ago

in a company 70% of the workers are women. if 1530 men work for the company how many workers are there in all? use pencil and pa

Ghella [55]

Women= 70%=?
Men= 100%-70%=30%=1,530
Women Workers= cross product (0.70*1,530)/0.3= 3,570
All workers= 1,530+3,570= 5,100

6 0

3 years ago

Read 2 more answers

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

<em>Alternative Method</em>

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

<em>Find the solutions of the original equation</em>

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

A family buys 4 airline tickets and travel insurance that costs $17 per ticket. The total cost is $736. Let x represent the pric

Y_Kistochka [10]

Answer:

Step-by-step explanation:

3 0

3 years ago

Lucy made $132 for 11 hours of work.

OlgaM077 [116]

Answer:

132/11 = 12

204/12 = 17

17 hours

4 0

3 years ago