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
Usimov [2.4K]
3 years ago
9

Please help me with question 12 :(

Mathematics
1 answer:
Nikitich [7]3 years ago
3 0

Answer:

30

Step-by-step explanation:


You might be interested in
The length of the rectangle is x cm. The length of a diagonal of the rectangle is 8 crn. The perimeter of the rectangle is 20 cm
klemol [59]

Answer:

x^2-10x+18=0

<em>a</em> = -10 and <em>b</em> = 18.

Step-by-step explanation:

Let <em>w</em> represent the width of the rectangle.

We are given that the perimeter of the rectangle is 20 cm, this means that:

20=2(x + w)

Let's put <em>w</em> in terms of <em>x</em>. Divide both sides by two:

10=x+w

And solve for <em>w:</em>

<em />w=10-x<em />

So, the rectangle measures <em>x</em> by (10 -<em> x</em>) cm.

<em />

According to the Pythagorean Theorem:

a^2+b^2=c^2

<em>a</em> and <em>b</em> are the legs and <em>c</em> is the hypotenuse.

Substitute <em>x</em> for <em>a, w</em> for <em>b</em>, and 8 for <em>c:</em>

<em />x^2+w^2=8^2<em />

Simplify and substitute:

x^2+(10-x)^2=64

Square:

x^2+(100-20x+x^2)=64

Isolate the equation. So:

2x^2-20x+36=0

Since the leading coefficient is one, divide both sides by two:

x^2-10x+18=0

Therefore, <em>a</em> = -10 and <em>b</em> = 18.

6 0
2 years ago
Without solving, NO SOLUTION describes which equation?
CaHeK987 [17]

Answer:

The equation 'y = y + 1' represents NO SOLUTION.

Hence, option 'C' is true.

Step-by-step explanation:

a)

6a = 9a

subtract 9a from both sides

6a - 9a = 9a - 9a

-3a = 0

divide both sides by -3

-3a / -3 = 0/-3

Simplify

a = 0

b)

5x = 28

divide both sides by 5

5x/5 = 28/5

x = 28/5

c)

y = y + 1

subtract y from both sides

y - y = y+1-y

0 = 1

These sides are not equal, so

NO SOLUTION!

d)

y + 5 = 12

subtract 5 from both sides

y + 5 - 5 = 12 - 5

y = 7

Conclusion:

Therefore, the equation 'y = y + 1' represents NO SOLUTION.

Hence, option 'C' is true.

5 0
3 years ago
Read 2 more answers
If the exchange rate changes from​ $1.45 = 1 euro to​ $1.37 = 1​ euro, then
Leto [7]
The euro has depreciated and the dollar as appreciated
4 0
3 years ago
Fill in the answer to 5+5=4+_
Gnom [1K]

Answer:

6

Step-by-step explanation:

5+5=10, so 4+6=10

4 0
3 years ago
Read 2 more answers
Could a circle be circumscribed around this?​
djyliett [7]

Answer:

no

Step-by-step explanation:

4 0
2 years ago
Other questions:
  • 228000(1.03) exponential or decay
    12·1 answer
  • Plz help ASAP! <br>solve for m.<br>p=2m+2u 
    6·1 answer
  • H e l p ; - ; <br><br>idk how to manipulate it ; - ; .
    6·1 answer
  • Find the mean, variance and standard deviation of the probability distribution overtime hours 0,1,2,3,4,5,6 probability.015,.070
    13·1 answer
  • PLS HELP FAST<br> The table below represents a function.
    6·2 answers
  • Can someone help me solve this step by step? tyyyy
    8·1 answer
  • The ratio of the number of coins to the number of notes Mrs James has in her purse is 2 : 5.
    8·1 answer
  • Need helppppp I’m stuckkkk
    11·2 answers
  • Need answer asap algebra 2 math
    14·1 answer
  • Racheal used a total of 5 1/6 gallons of gas while driving her car. Each hour she was driving, she used 5/9 gallons of gas. What
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!