All categories

4 years ago

2 (k + 2) = 8k - 5 - 3k

Mathematics

2 answers:

ruslelena [56]4 years ago

7 0

Answer:

k=3

Step-by-step explanation:

9966 [12]4 years ago

7 0

Answer:k=3

Step-by-step explanation:

You might be interested in

How do you write 14/12 and 31/10 as a mixed number

Naddik [55]

14/12=1 and 2/12= 1 and 1/6

31/10= 3 and 1/10

6 0

4 years ago

Read 2 more answers

Parallelogram has a base of 9 and height of two thirds what is the area

Vsevolod [243]

Answer:

Area or parallelogram = base * height

Area = 9 units * 2/3 units

Area = 9/1 * 2/3 square units

Area = 18/3 square units

Area = 6 square units

Answer: area = 6 square units

6 0

3 years ago

Phil is riding his bike. He rides 42 miles in 4 hours, 52.5 miles in 5 hours, and 63 miles in 6 hours. Find the

kvasek [131]

If we take 42/4, or any other of the sets, you will get 10.5, which is k.

10.5 is the amount of miles travelled in 1 hour.

Since we just multiply time and miles to get y, our equation will just be in y=kx format. 10.5 * time is the same as writing 10.5x since x is the hours. y would be miles.

Constant of proportionality: k = 10.5

The equation: y = 10.5x

4 0

3 years ago

Read 2 more answers

Mr. Javier purchased a number of pencils for ₱180 and sold all except 6 at a profit of ₱2 per pencil. With the total amount rece

Luba_88 [7]

Answer:

36 pencils

$Cost = 0.2$

Step-by-step explanation:

Given

Cost Price = 180

Represent the number of items by x

This implies that the cost of each item is $\frac{x}{180}$

$Selling\ Price = Cost + Profit$

$Selling\ Price = \frac{x}{180} + 2$

Since all but 6 items were sold, the total selling price is:

$Total = (x - 6)(\frac{x}{180} + 2)$

This amount can be used to buy 30 more items.

So, we have:

$(x - 6)(\frac{x}{180} + 2) = x + 30$

Multiply both sides by 180

$180 * (x - 6)(\frac{x}{180} + 2) =180(x + 30)$

$(x - 6)(x + 360) = 180x + 5400$

Expand brackets

$x\² + 360x - 6x - 2160 = 180x + 5400$

$x\² + 354x - 2160 = 180x + 5400$

Equate to 0

$x\² + 354x - 180x - 2160 - 5400 = 0$

$x\² + 174x - 7560 = 0$

Expand

$x\² + 210x - 36x - 7560 = 0$

$x(x + 210) - 36(x + 210) = 0$

$(x - 36)(x + 210) = 0$

$x - 36 = 0$ or $x + 210 = 0$

$x = 36$ or $x = -210$

<em>Since, number of items can't be negative, we have to discard x = -210.</em>

Hence:

$x = 36$

<em>We can then conclude that, Mr. Javier purchased 36 pencils</em>

Recall that

$Cost = \frac{x}{180}$

$Cost = \frac{36}{180}$

$Cost = 0.2$

5 0

4 years ago

Are you smarter than a 5th grader questions

enyata [817]

Yes I am
:)))))))))))))))))))))

7 0

3 years ago