Mathematics High School

Review the following information about vectors q and r.
What is the value of a?
q=(-4,1)
31
r = (a, 3)
7(q + r) = (-35, 28)
-5

Review The Following Information About Vectors Q And R.What Is The Value Of A?q=(-4,1)31r = (a, 3)7(q

Answers

Answer 1
Answer:  a = -1  (fourth choice)

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

Work Shown:

q = (-4, 1) is one vector

r = (a,3) is another vector

The resultant vector is

q+r = (-4,1)+(a,3)

q+r = (-4+a,1+3)

q+r = (-4+a,4)

Multiply both sides by 7

7(q+r) = 7*(-4+a,4)

7(q+r) = (7*(-4+a),7*4)

7(q+r) = (-28+7a, 28)

---------------

Since 7(q+r) = (-35, 28), we know that,

(-28+7a, 28) =  (-35, 28)

which leads to

-28 + 7a = -35

when we equate the x components of each vector. Let's solve for 'a'

-28 + 7a = -35

7a = -35+28

7a = -7

a = -7/7

a = -1

--------------

Check:

q = (-4,1)

r = (a,3) = (-1,3)

q+r = (-4,1)+(-1,3)

q+r = (-4+(-1), 1+3)

q+r = (-5, 4)

7*(q+r) = 7*(-5, 4)

7*(q+r) = (7*(-5), 7*4)

7*(q+r) = (-35, 28)

The answer is confirmed.

Answer 2

Answer:

D. -1

Step-by-step explanation:

edge test

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Why is 2020 edge so hard and annoying I’m on edge 10 hours a day! Here is 14 points

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Answer:

hey i lucked out again

Step-by-step explanation:

And yea 2020 edge is very hard

Well.. same.. it’s longgggg

Line BC is represented by 3x + 2y = 8. Line AD is represented by –3x – 2y = 6. What is the relationship of line BC to line AD? Explain how the sum of the equations demonstrates this relationship.

Answers

Answer:

2

Step-by-step explanation:

if you suntract the 2 you, 3x cancels 2y cancels, 8-6 is 2

Answer:  Line BC is parallel to line AD. The system of equations has the sum 0 = 14. Since this is a false equation, the system has no solution, which means the lines will never intersect.

Step-by-step explanation:

How would you find x?

Answers

Answer:

A

Step-by-step explanation:

x=7

3) The ratio of blue chairs to red chairs in Ms. Escobedo's class is 4 to 7. Which of
the following cannot represent the total number of chairs in Ms. Escobedo's
class?

Answers

Answer:

20

Step-by-step explanation:

7+4=11

11 multiplied can be 22, 33, and 44 but not 20

help PLEASEE BRAINLIST​

Answers

Answer:

The first two on the right will not be used

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4. goes to 2.

5. goes to 4.

6. goes to 3.

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$22 haircut; 20% tip
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Answers

Answer:

20% tip = $4.40; total = $26.4

Step-by-step explanation:

20 % = 0.20 ------> 22 * 0.20 = 20% of 22

20% of $22.00 = $4.40

total = $22.00 + $4.40

total = $26.40

I don’t understand this assignment!!

Answers

Answer:

Equation of the Line: y = 1.25x + 5

Equation in Standard Form: 5x - 4y = -20

Step-by-step explanation:

y = mx + b

[tex]\frac{17.5 - 22.5}{10 - 14}[/tex] = [tex]\frac{-5}{-4}[/tex] = [tex]\frac{5}{4}[/tex] or 1.25

y = 1.25x + 5

Ax + By = C  (A must be positive, and no fractions or decimals)

y = 1.25x + 5

-1.25x + y = 5

times -4

5x - 4y = -20

Identify the slope (m) and y-intercept (b) of each linear equation.
52. 3x+4y=24

Answers

Answer:

Step-by-step explanation:

  [1]    3x - 4y = -24

  [2]    -x - 16y = -52

Graphic Representation of the Equations :

   -4y + 3x = -24        -16y - x = -52  

 

Solve by Substitution :

// Solve equation [2] for the variable  x

 [2]    x = -16y + 52

// Plug this in for variable  x  in equation [1]

  [1]    3•(-16y+52) - 4y = -24

  [1]     - 52y = -180

// Solve equation [1] for the variable  y

  [1]    52y = 180

  [1]    y = 45/13

// By now we know this much :

   x = -16y+52

   y = 45/13

// Use the  y  value to solve for  x

   x = -16(45/13)+52 = -44/13

Solution :

{x,y} = {-44/13,45/13}

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Answers

Answer:

y intercept: (0,-5)

Step-by-step explanation:

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Answers

Answer:

C 0<h<1400

Step-by-step explanation:

You have to calculate the first 40 hours of pay at a 20$ rate which is $800. Then you have to calculate the overtime which is the remaining 20 out of 69 hours he can work times 30$ which is $600

$600+$800=$1400, which is the maximum amount he could make

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Answers

Answer:

x=-14

Step-by-step explanation:

Answer:

here

Step-by-step explanation:

x= - 14

1

Here is the question again

Answers

Answer:

[tex]\huge\boxed{11}[/tex]

Step-by-step explanation:

[tex]\sf = y^2-x^2\\\\Put \ y = 6 \ and \ x = 5\\\\=(6)^2-(5)^2\\\\=36-25\\\\= 11\\\\\rule[225]{225}{2}[/tex]

Hope this helped!

~AnonymousHelper1807

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A horticulturist wants to improve the soil quality in a garden by adding 120 pounds of nitrogen and 54 pounds of potassium. A pack of organic fertilizer contains 2 pounds of nitrogen and 3 pounds of potassium, and a pack of inorganic fertilizer contains 6 pounds of nitrogen and 2 pounds of potassium. How many packs of each type of fertilizer does the horticulturalist need to use? (Hint Write an equation for the total amount of nitrogen (120 pounds) obtained by adding the packs of both the fertilizers and another equation for the total amount of potassium (54 pounds) obtained by adding the packs of both the fertilizers.)

A organic fertilizer: 24 packs; inorganic fertilizer: 12 packs

B. organic fertilizer: 14 packs; inorganic fertilizer: 6 packs

C organic fertilizer: 15 packs; inorganic fertilizer: 8 packs

D. organic fertilizer: 9 packs; inorganic fertilizer: 17 packs

Е. organic fertilizer: 6 packs; inorganic fertilizer: 18 packs​

Answers

x and y are the packs of organic and inorganic fertilizer, respectively.

pounds of nitrogen added = 2x + 6y = 120

pounds of potassium added = 3x + 2y = 54

eliminate the y terms. subtract the first equation from 3 times the second equation.

9x + 6y = 162

-2x - 6y = -120

------------------

7x = 42

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Answers

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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Answers

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Answers

Answer:

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Step-by-step explanation:

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Answers

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Answers

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Answers

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Mark as Brainliest!



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Answers

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Step-by-step explanation:

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Step-by-step explanation:

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Answers

Step-by-step explanation:

Hey there!

Given;

-5/6m = -60

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~ Divide "-5" by "-360"

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Answers

Answer:

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Step-by-step explanation:

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