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
Alisiya [41]
1 year ago
8

WILL GIVE BRAILIEST: 8th grade: equations and geometry

Mathematics
2 answers:
Aloiza [94]1 year ago
8 0
That’s should he right but also it could of been 54
USPshnik [31]1 year ago
7 0

Answer:

C. j=2 and h=4

Step-by-step explanation:

Step 1: Create a system of equations for your problem based off what we know.

- we should know that the equation to find the perimeter of something is

P= 2l+2w where <em>P</em> is the perimeter, <em>l </em> is the length, and <em> w </em> is the width.

- we know that the perimeter of Rectangle P is 20 inches and that the perimeter of Rectangle Q is 30

- we know the length and width of both rectangles

Using this information, lets set up our system.:

\left \{ {{20=2(j+4)+2h} \atop {30=2(3h)+2(j+1)}} \right.

Step 2: Using the top equation we're going to try to solve for one of the variables. I chose to solve for variable <em>j.</em>

20=2(j+4)+2h

Start by distributing 2 into j + 4.

20=2j+8+2h

Now subtract 8 from both sides of the equation.

12=2j+2h

Now isolate variable j by subtracting 2h from both sides of the equation.

12-2h=2j

Now condense the equation into simple terms by dividing both sides by its GCF 2 then reorder to get j on the left.

j=6-h

Step 3: Now that we solved for variable j we can now substitute j into one of our equations from the original system. I chose to use the bottom equation and chose to distribute it before substituting.

30=6h+2j+2

Subtract two from both sides to isolate the variables

28=6h+2j

Now we can plug j into our equation

28=6h+2(6-h)

Step 4: Distribute 2 into 6-h

28=6h+12-2h

Step 5: Combine like terms

28=4h+12

Step 6: Subtract 12 from both sides of the equation

16=4h

Step 7: Divide both sides by 4

4=h

Now that we know that h=4 we can plug 4 into one of our earlier equations. I used j=6-h

j=6-4\\j=2

Plug answers into either one of the original equations to check answer

You might be interested in
Eight avocados cost 4 how much does 11 avocados cost
Elden [556K]
It costs 5,5! Bc 1 costs 0,5
5 0
3 years ago
Read 2 more answers
If &lt;2 and &lt;3 are complementary how could you use the vertical angle theorem to find m&lt;1
Troyanec [42]

for solving equations such as this chrome would be the best thing n

8 0
2 years ago
You have a part time job. You work for 3 hours on Friday and 6 hours on Saturday. You also receive an allowance of $20 per week.
Svetradugi [14.3K]
$92 - $20 = $72, because we shouldn't take allowance into account
3 + 6 = 9, because that is the total number of hours this person works per week
We should just do this:
72 / 9 = 8
This means that this person earns $8 per hour at his part time job. 
8 0
2 years ago
I've been stuck on this for an hour. Can someone help?
kicyunya [14]
I cant read the price numbers which price numbers are there left
4 0
3 years ago
Add. (5y - 1) + (-2y + 4) A) 3y - 5 B) 3y + 3 C) 7y + 3 D) 7y - 3
Ivan
(5y - 1) + (-2y + 4)  = 5y - 1 - 2y + 4
                              = 5y - 2y - 1 + 4
                              = 3y + 3    [OPTION B] 
8 0
2 years ago
Other questions:
  • Geometry an Isosceles triangle has at least two congruent sides the permitter of a certain isosceles triangle is at most 12 inch
    10·1 answer
  • Raylene bought a roll of tape with a length of 18.9 feet. if she has used 6.3 feet, how much tape is left?
    9·1 answer
  • (3, -2), slope - 1/6
    8·1 answer
  • What is the range of the function y = x2?<br> all real numbers<br> xzo<br> y20
    12·1 answer
  • Tens and ones combinations. 30 + ? + ? + ? / ? + ? = 92
    5·2 answers
  • what is the difference in height between 30 m up a cliff and 87 m up a cliff? What is the distance between these positions?
    7·2 answers
  • What is the slope &amp; y-intercept of this equation? y = -1/3x - 5
    8·1 answer
  • If your total income before exemptions were $10,000 how much would you pay in taxes?
    11·1 answer
  • Solve for x -6x-2≥16
    6·2 answers
  • This is kinda easy ig helpppp tho
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!