All categories

3 years ago

Given 10k -4 =2k-20 prove k=-2

Mathematics

2 answers:

xeze [42]3 years ago

8 0

Answer:

10k-4=2k-20

+4 +4

10k=2k-16

-2k -2k

8k=-16

$\frac{8k}{8}=\frac{-16}{8}$

k=-2

Check:

10(-2)-4=2(-2)-20

-20-4=-4-20

-24=-24

Step-by-step explanation:

RoseWind [281]3 years ago

3 0

Answer:

10.k-4=2.k-20

10k-2k=-20+4

8k=-16

K=-2

Step-by-step explanation:

You might be interested in

Find the value of x.

viktelen [127]

A is the closest, hope this helped

6 0

3 years ago

Evaluate

damaskus [11]

Answer:

Your search - 32y−3+53z23y−3+ 35z when y=6y=6 andz=3z=3. - did not match any documents.

Suggestions:

Make sure all words are spelled correctly.

Try different keywords.

Try more general keywords.

Try fewer keywords.

Step-by-step explanation:

6 0

2 years ago

Alex the electrician needs 34 yards of electrical wire to complete his job. He has a coil of wiring in his workshop. The coiled

bogdanovich [222]

Answer: This coil will not be enough to complete the job.

Step-by-step explanation:

The circumference of the coil of wiring can be calculated with:

$C=2\pi r$

Where r is the radius and $\pi=3.14$

The radius can be calculated by dividing the diameter by 2. Then:

$r=\frac{18in}{2}\\\\r=9in$

Convert 9 inches to yards (1 yard=36 inches):

$(9in)(\frac{1yd}{36in})=0.25yd$

Substitute this radius into the formula:

$C=2(3.14)(0.25yd)\\C=1.57yd$

Since there are 21 circles of wire, you need to multiply $C=1.57yd$ by 21:

$C_T=(1.57yd)(21)=32.97yd$

The coil has 32.97 yards of wire and Alex needs 34 yards, therefore, this coil will not be enough to complete the job.

8 0

2 years ago

Ashley bought some books. She spent a total of $58 after a discount of $8 off of her total purchase. Each book cost $6. How many

Artyom0805 [142]

Answer:

11 books

b=(58+8)/6

Step-by-step explanation:

58+8=66

66/6=11

6 0

3 years ago

PLEASE HELP On the number line, graph the solution to the inequality -5(x+1) > 7x + 31? Can you tell me how to go about doing

elena-s [515]

Answer:

I don't know how to insert a number line, but you have to put on it x<-3. You have to plot it, then put a open circle at -3, and draw an arrow, pointing it farther into the negitive side of the number line.

Step-by-step explanation:

3 0

2 years ago