1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
wariber [46]
2 years ago
7

Help me I need the answer on paper help me now

Mathematics
1 answer:
Viktor [21]2 years ago
3 0

Answer:

a) k = 10              b) k = 7.5

Step-by-step explanation:

<h3><u><em>a)</em></u></h3>

( 5k+ 20 ) + ( 7k + 40 ) = 180

12k + 60 = 180

12k = 120

k = 10

<h3><u><em>b)</em></u></h3>

40 + ( 12k + 10) + 180 - ( 8k + 80 ) = 180

50 + 12k + 180 - 8k - 80 = 180

50 + 12k -8k - 80 = 0

50 + 4k - 80 = 0

30 = 4k

k = 7.5

You might be interested in
Sum of 2 numbers is 150. The ratio is 3:2. What are the numbers
Gekata [30.6K]
The numbers are 90 and 60. this is because with a ratio 3:2 and multiplying each # in our ratio by 30 gets us the numbers 90:60......

and adding 90 + 60 will get us 150
5 0
4 years ago
20+20+20+20+20+10+5+5
Vaselesa [24]

the answer to this equation is 120

4 0
3 years ago
Read 2 more answers
replacing a square window with a rectangular one. the new window is 3ft wider and 2ft higher than the square one. the area is 30
zysi [14]
So your equation would be x+3 times x+2 = 30
When you factor this out, you get x^2 + 5x + 6 = 30
Then you have to move the 30 over so you can set it equal to zero, so subtract 30 from both sides of the equal sign. 
You now have X^2 + 5x -24 =0
Here you'd try to refactor, but unfortunately that doesn't work in this equation so you have to use the quadratic formula. 

Look up the formula if you don't know it, it would be more confusing if I tried to type it out. Just keep in mind that for this equation, a=1 b=5 and c= -24. 

3 0
4 years ago
Mr. Yi buys vegetables at a market. He purchases 6 pounds of potatoes, p, and 3 pounds of onions, n, for $18. Onions cost twice
musickatia [10]

Answer:

Step-by-step explanation:

1,3,5

8 0
3 years ago
Which of the following is the radical expression of a 5/7
Alisiya [41]
Choice of answers? ?????
7 0
4 years ago
Other questions:
  • R the experiment of rolling an ordinary pair of​ dice, find the probability that the sum will be less than 4 or greater than 10.
    13·1 answer
  • Solve for x. Enter your answer in interval notation using grouping symbols. x^2 + 8x &lt; 48
    6·1 answer
  • A bagback that normally sales $39 is on sale for 30% off.Find the amount of the sale price
    9·1 answer
  • Suppose you have 30 CDs. You know that you have 11 more CDs than your friend. Write and solve an equation to find the number of
    9·1 answer
  • A person saves €1 in the first month and decides to double the amount he saves the next month. He continues this pattern of savi
    9·1 answer
  • I need this answer as soon as possible, please... Thank you!!!
    14·2 answers
  • Using the graph, what is one solution to the equation f(x) = g(x)?
    12·1 answer
  • Find all solutions of 2x^2+ 5 = 2x and express them<br> in the form a +bi.
    10·1 answer
  • Been stuck on this for a while man...
    10·1 answer
  • The factors of 25x4 − 49y2 are <br> .
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!