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
natali 33 [55]
2 years ago
6

Please use system of linear equations by elimination OR substitution. I need the work as well please.

Mathematics
1 answer:
Olin [163]2 years ago
3 0

1) P= 64 cm, width = x, length = 14 + x

64 = x + x + 14 + x + 14 + x

64 = 4x + 28

4x = 64 - 28

4x = 36

x = 36/ 4

x = 9

AREA = 9 x (9+14)

Area = 9 x 23

Area = 207 cm

2) smaller no. = y, bigger no. = x

x - y = 3

2x+1/2y=36

Next, multiply 2 to first equation and find y:

2x-2y=6

5/2y=30

y = 12

Substitue y to x-y=3 to find x,

x = 15

3) x = pencil, y = pen

5x + 4y = $6.15

8x + 3y = 9.85$

8x + 7y = ?

5x + 4y = 6.15$ multiply both sides by -3

8x + 3y = 9.85$ multiply both sides by 4

-15x + 32x = (-3)*6.15 + 4*9.85

7x = 19.87 multiply both sides by 8/7

8x = (8/7) x 19.87

Add both equations:

32y - 15y = 8x6.15 - 5*9.58

17y = 1.3

y = 91/17) x 1.3

7y = (7/17)x 1.3

8x + 7y = (8/7) x 19.87 + (7/17) x 1.3

8x + 7y = $23.244

4) 2l + 2w = 0

2 x 2l + 2 x 1/2w = 40 + 16

l+w = 20

4l+w = 56

I’ve got l = 12 and w = 8

5) answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° = \frac{ab}{bc}

but bc = 20 feet.

⇒ tan 55 ° =   \frac{ab}{20}

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet

6) The answer is teh attachment !

7) 3x-x+2=4

HOPE THE ANSWERS HELP!! PL MARK ME BRAINLIEST!

You might be interested in
Write and solve an equation based off the verbal phrase: 6 more than x is equal to 33
kenny6666 [7]

Answer:

x + 6 = 33

Step-by-step explanation:

6 more than x means there's an increment in the value of x by addition of 6

x + 6 = 33

This leads to an algebraic linear equation. x is an unknown variable and can be solved for

we subtract 6 from both sides of the equation

x + 6 - 6 = 33 - 6

x = 27

Therefore, we can say 6 more than 27 is 33

5 0
3 years ago
How to find the volume of this cube
Katena32 [7]
The answer is b because volume=length x width x height
5 0
3 years ago
Marissa notices that the top of the net is 20 inches higher than the tallest player on the team. The net is less than 90 inches
Vika [28.1K]
No, the inequality uses less than or equal to, but it should be less than. The relationship could be written as h<span> + 20 < 90. This says that the tallest player’s height plus 20 inches is less than 90 inches.</span>
6 0
3 years ago
Read 2 more answers
A pair of tomato plants sells for $20.65. the cost is $7.32 each. what is the markup rate, based on cost to the nearest tenth of
Serggg [28]
Answer: 64.6%

Explanation:

\textnormal {Markup Rate = } \cfrac{20.65 - 7.32}{20.65} \times 100 = 64.6\%
8 0
3 years ago
Read 2 more answers
The average cost when producing x items is found by dividing the cost function, C(x), by the number of items, x. When is the ave
Aleks04 [339]
Dividing the cost function
8 0
3 years ago
Other questions:
  • In the diagram, line A F is a side of regular hexagon ABCDEF inscribed in circle O. what is mFDA? 
    10·1 answer
  • suppose the correlation coefficient between the number of the college students in a city and the number of city buses is 0.89. w
    15·2 answers
  • The spotter on the ground is standing beneath the safety net. What is his distance from the base of the platform, to the nearest
    8·1 answer
  • why can you write a subtraction problem as an addition problem? How do you write a subtraction problem as an addition problem?
    9·1 answer
  • Is this true or false pls help??
    13·2 answers
  • Theo bought 8 packs of pencils for $4 each and 3 packs of
    12·1 answer
  • Need help with homework-math
    6·1 answer
  • Triangle ABC is a right triangle. Point D is the midpoint of side AB, and point E is the midpoint of side AC. The measure of ang
    13·1 answer
  • Please help with homework.<br> My question is:<br> <img src="https://tex.z-dn.net/?f=%28x%2B7%29%5E%7B4%7D" id="TexFormula1" tit
    12·2 answers
  • 3. Try It #3 Write the point-slope form of an equation of a line with a slope of -2 that passes through the point (-2,2). Then r
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!