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Jobisdone [24]
3 years ago
15

Solve each system using elimination.

Mathematics
2 answers:
Tema [17]3 years ago
5 0
Https://www.mathpapa.com/algebra-calculator.html
Sorry i cant answer im in a hurry! BUT ITS A GREAT ALGEBRA CALCULATOR!
Artyom0805 [142]3 years ago
5 0
A) 3x + 3y = 27 ----- (1) 
 x - 3y = -11-------(2)
 Multiplying (2) by 3 we have 3x - 9y = -33 ----(3)
 Subtracting (3) from (1) we have 
 -9y - 3y = -33 - 27
 So y = 5. Substituting value of y into (1) we have 3x + 3(5) = 27. So x = 27 -
15/ 3 = 4.
 B) Also 2x + 4y= 22 ----(1)
  2x - 2y= -8 -----(2)
 Subtracting (2) from (1) we have 
 -2y - 4y = -8 - 22 = -30
 -6y = - 30. Hence y = 5. Substituting into (1) we have 2x + 4(5) = 22. X = 22 - 20/2 = 1
 C) 5x - y = 0 -------(1)
  3x + y = 24 ------(2)
 Adding (2) to (1) we have 
 3x + 5x = 24. X = 24/8 = 3. So y = 5(3) - y = 0. y = 15
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Suppose two lines are parallel.
mylen [45]
<h3>3 Answers: Choice A, Choice B, Choice E</h3>

============================================================

Explanation:

Let's go through each answer choice one by one to see if it's true or false.

  • A) This is true. Parallel lines have equal slopes, but different y intercepts.
  • B) This is true because of the corresponding angles theorem.
  • C) This is false. The statement applies to perpendicular lines, rather than parallel ones.
  • D) This is false in general. The only time it's true is when the consecutive interior angles are 90 degrees each. Otherwise, the statement is false.
  • E) This is true. Let's say we drew any diagonal line we wanted. Now imagine picking a point on that line and shifting it up 5 units. Do this for another point and draw a line through the two separated points. This forms a parallel line. The upper line has been shifted up 5 units compared to the lower line.
  • F) This is false in general. It's only true when both alternate interior angles are 90 degrees each; otherwise, it is false.
5 0
3 years ago
WILL GIVE BRAINLIEST THANKS AND 5 STARS FOR CORRECT ANSWER Desmond ran a lemonade stand in front of his house for the fans walki
Fiesta28 [93]

Answer:

56

Step-by-step explanation:

First, convert the 70% so that we can use it with the 80 cups. To do this, convert the percent to a decimal by moving the decimal 2 spaces to the left:

70% → 70.00 → 0.70 → 0.7

70% percent can be seen as 0.7. Multiply this by 80:

80*0.7=56

So, 70% of 80 is 56. Desmond sold 56 cups on the second Saturday.

:Done

7 0
3 years ago
The perimeter of a rectangular pool is 72 meters. If the length of the pool is twice its breadth. Its length is_________.
lana66690 [7]

Answer:

Length = 18 meters

Step-by-step explanation:

Let the length of the rectangular pool = l meters

And breadth of the pool = w meters

Perimeter of the rectangular pool = 2(l + 2w)

Since, perimeter of the rectangular pool is 72 meters.

2(l + 2w) = 72

l + 2w = 36 --------(1)

If length of the pool is twice of its breadth,

l = 2w

w = \frac{l}{2} -------(2)

By substituting the value of 'w' from equation (2) to equation (1),

l+2\times{\frac{l}{2}}=36

2l = 36

l = 18 meters

8 0
3 years ago
In a group of 65 students when you have brown eyes and 30 have blue eyes. Find the Probability that a student pick from this gro
Gemiola [76]

Answer:

The probability that a student pick from this group at random either has blue or brown eyes is

P = 40/65 = 0.6154

P = 61.54%

Corrected question;

In a group of 65 students 10 have brown eyes and 30 have blue eyes. Find the Probability that a student pick from this group at random either has blue or brown eyes

Step-by-step explanation:

Given;

Total number of students = 65

Number of students with either blue or brown eyes;

= 10+30 = 40

The probability that a student pick from this group at random either has blue or brown eyes is

P = 40/65 = 0.6154

P = 61.54%

4 0
3 years ago
A scientist builds a Mars rover that can travel 4.9 centimeters per second on flat ground. If the rover continues at the same ra
Shalnov [3]

Do do this, you use the distance formula: time * speed = distance

So you do, 4.9 * 15.5 = 75.95

So, the rover will travel <u>75.95 centimeters</u> in 15.5 seconds at a speed of 4.9 cm./s

5 0
3 years ago
Read 2 more answers
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