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3 years ago

Help Plzz 40 points!! Solve 5= 1/5x -3 ENTER ANSWER PLZZ THANKS!!

Mathematics

2 answers:

NeTakaya3 years ago

5 0

Answer:

x = 40

Step-by-step explanation:

5= 1/5x -3

Add 3 to each side

5+3= 1/5x -3+3

8 = 1/5x

Multiply by 5 to isolate x

5*8 = 1/5x *5

40 =x

adoni [48]3 years ago

4 0

Hello! :)

Answer:

$\boxed{x=40}$

*The answer must have a <u><em>POSITIVE</em></u> sign!*

Step-by-step explanation:

First, you switch sides of an equation.

$\frac{1}{5}x-3=5$

Then, you add by 3 from both sides of an equation.

$\frac{1}{5}x-3+3=5+3$

Add by the number from left/right.

$5+3=8$

$\frac{1}{5}x=8$

Multiply by 5 both sides.

$5*\frac{1}{5}x=8*5$

Multiply by the numbers.

8*5=40

x=40

Hope this helps!

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good morning fellow brainsters please help me i’m tired and i just drank a four loko... can’t think. will give 15 points

borishaifa [10]

Answer:

7. $x=3$

8. l=11cm and w=7 cm

9. $x-5\ge12$

10. $\frac{x}{3}\le15$

Step-by-step explanation:

Question 7.

The given expression is:

$12-3(2x+1)=7x-3(7+x)$

Expand the parenthesis using the distributive property:

$12-6x-3=7x-21-3x$

Group similar terms:

$-6x-7x+3x=-21+3-12$

Simplify

$-10x=-30$

Divide both sides by -10

$x=3$

Question 8:

Let the width of the rectangle be; $w$

The length of the rectangle is $l=w+4$

The perimeter is given as: $P=2(l+w)$

Given that the perimeter P=36, then:

$36=2[(w+4)+w)]$

$\implies 36=2(2w+4)$

Divide both sides by 2:

$\implies 18=2w+4$

Subtract 4 from both sides:

$\implies 18-4=2w$

$\implies 14=2w$

$\implies w=7$

The dimensions of the rectangle is: w=7 cm and l=7+4=11cm

Question 9

Let the number be x.

"5 fewer than the number" is written as $x-5$

"5 fewer than a number is at least 12" becomes

$x-5\ge12$

Question 10:

Let the number be x.

The quotient of a number and 3 is written as:

$\frac{x}{3}$

The quotient of a number and 3 is no more than 15 is written as;

$\frac{x}{3}\le15$

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3 years ago