3 years ago

Given: 5n-42=12n prove: n=-6

Mathematics

2 answers:

Leviafan [203]3 years ago

6 0

Answer:

5n-42=12n

5n-42+42=12n+42

5n=12n+42

5n-12n=12n+42-12n

-7n=42

-7n/-7 = 42/-7

n= -6

Vikentia [17]3 years ago

3 0

Answer:

n=-6

Step-by-step explanation:

5n-42=12n

5n=12n+24

5n-12n=42

-7n=42

divide each side by -7

n does =-6

You might be interested in

Jennifer is 4 years older than Harvey. Harvey is twice as old as Gwen. If Gwen is g years old, which expression represents Jenni

Dafna11 [192]

Answer:

2g+4

Step-by-step explanation:

Harvey is twice as old as Gwen. The equation for this is 2g.

If we need to find Jennifer's age, which is 4 years older than Harvey, then we need to add 4 to Harvey's age.

2g+4

6 0

3 years ago

One solution of the quadratic equation X2 – 19x + 48 = 0 is 3. What is the other solution?

Liula [17]

Answer:

Step-by-step explanation:

The equation is X2 – 19x + 48 = 0

Using the quadratic formula

X= - b +- √ ( b^2 - 4ac)/ 2a

Where a= 1 b= -19 c= 48

Substitute into the formula we have

CHECK THE ATTACHMENT

HENCE, the solution are 3 and 16

7 0

3 years ago

A woman at your company saves 10% of her salary. What fraction of her salary does she save?

katrin [286]

The woman wouuld save 1/10 or 1 tenth of her salary

5 0

3 years ago

What the answer to this equation be?

scoray [572]

If you expand the square, you have

$\dfrac{1}{4}x^2-3x=7x+8-10x$

Simplify the right hand side:

$\dfrac{1}{4}x^2-3x=-3x+8$

Cancel the -3x appearing on both sides:

$\dfrac{1}{4}x^2=8$

Multiply both sides by 4:

$x^2=32$

Consider the square root of both terms (using the doubles sign):

$x=\pm\sqrt{32}=\pm4\sqrt{2}$

5 0

3 years ago

−7=y7 please help me out

Yuri [45]

Answer:

Step-by-step explanation:

y=-1

7 0

2 years ago

Read 2 more answers