All categories

3 years ago

If 2k - 3 = 9 (k+7)-3 then k is ????

Mathematics

2 answers:

Akimi4 [234]3 years ago

6 0

Answer:

K = -9

Step-by-step explanation:

2k-3 = 9(k+7)-3

2k-3 = 9k+63-3

2k-3 = 9k+60

2k-9k = 60+3

-7k = 63

-k = 9

k = -9

m_a_m_a [10]3 years ago

4 0

Answer:

k= -9

Step-by-step explanation:

2k-3=9k+63-3 [expand the 9(k+7) first]

2k-9k=63-3+3 [put the like terms together]

-7k=63 [do the simple math]

k= 63 ÷ by -7

k=-9

You might be interested in

Jim needs to run at least 45 miles this week for training, If he has already run 17 miles, how many miles should he

Neporo4naja [7]

Answer:

7 miles

Step-by-step explanation:

45 - 17 = 28 miles

28 : 4 = 7 miles

8 0

3 years ago

In a certain function, y varies directly with x. If y = 6 when x = 8, find x when y = 9.

Hatshy [7]

If y = 6 when x = 8, then value of "x" when y = 9 is equal to 12

<u>Solution:</u>

Given that , In a certain function, y varies directly with x

And x = 8 when y = 6,

We have to find what will be the value of x when y = 9

Now, from the given information,

$\begin{array}{l}{y \alpha x} \\\\ {y=c x \rightarrow(1)}\end{array}$

where c is the proportionality constant

$\begin{array}{l}{\text { Now, substitute } x=8 \text { and } y=6 \text { in }(1)} \\\\ {\rightarrow 8=c(6) \rightarrow c=\frac{8}{6}} \\\\ {\rightarrow c=\frac{4}{3}} \\\\ {\text { Then, }(1) \rightarrow x=\frac{4}{3} y} \\\\ {\text { So, when } y=9} \\\\ {\rightarrow x=\frac{4}{3}(9)} \\\\ {\rightarrow x=4 \times 3} \\\\ {\rightarrow x=12}\end{array}$

Hence, x value is 12 when y value is 9

3 0

4 years ago

What is the answer to 76?

vovangra [49]

Answer:

13.2 minutes or 13 minutes 12 seconds.

Step-by-step explanation:

1. Count how much water drains the first pump every minute. Let the volume of pool be D. Every minute first pump drains D/11 water.

2. Working together(6 minutes) First pump drains 6D/11 water, hence the second pump drains 5D/11 water.

3.Count how much water drains second pump per minute -> (5D/11)/6= 5D/66

4. It takes the second pump 66 minutes to drain pool 5 times, thus it takes 13.2(66/5) minutes to drain the pool, which is 13 minutes 12 seconds.

7 0

4 years ago

10+48+100+56+100,000+567,759,999,999+66+773

Luden [163]

Answer:

567,760,101,052‬

Step-by-step explanation:

7 0

4 years ago

Read 2 more answers

AYUDA! Necesito ayuda con estas sencillas preguntas son muy fáciles y pago bien :)

blagie [28]

Answer:

I don't understand anyone that have a different language ._.

Step-by-step explanation:

cuz I can't the answer question ._.

8 0

3 years ago