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Verizon [17]
3 years ago
7

Complete the solution of the equation. Find the

Mathematics
2 answers:
Andrews [41]3 years ago
6 0

Answer:

4

Step-by-step explanation:

1. Substitute the x value of -9 into the equation:

6(-9) + 9y = -18

2. Simplify

-54+9y = -18

3. Add 54 to both sides to get 9y by itself, the goal is to get y by itself

9y = 36

4. Divide by 9 on both sides to get y completely by itself

y = 4

lianna [129]3 years ago
3 0

Answer:

4

Step-by-step explanation:

Just plug in -9 to the equation

6(-9) + 9y = -18

-54 + 9y = -18 isolate 9y

54 - 54 + 9y = -18 + 54

9y = 36 isolate y

9y/9 = 36/9

y = 4

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7 pens cost 84p, how much<br> would 11 pens cost?
Gelneren [198K]

Answer:

132p

Step-by-step explanation:

if 7 pens cost 84 total then you need to find the cost of each to know how much 11 pens would cost in total

84/7=12

now you know it's 12 each so just multiply 12 by 11 and you know how much for 11 total!

12*11=132p

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1 year ago
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Show your work for 11-12
Troyanec [42]

Answer:

11.

5x=3x+28

5x=3x+282x=28

5x=3x+282x=28x=14

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Step-by-step explanation:

<u>Please give brainliest if I helped! :)</u>

6 0
3 years ago
Two forces with magnitudes of 100 and 50 pounds act on an object at angles of 50° and 160°, respectively. Find the direction and
MatroZZZ [7]
<h2>Hello!</h2>

Since there is no additional information, we can assume that the given angles are respect to the horizontal axis (x), so

The answer is:

Magnitude: 95.14 lbs

Direction: 80° respect to the x-axis

<h2>Why?</h2>

Since there is no additional information about the given angles, we can assume that both angles are respect to the horizontal axis (x), positive direction to x-axis positive directions (right) and above x-axis.

<h2>Calculations:</h2>

100 pounds (lb) force, 50° angle:

100lbs*cos(50)=64.28lbs\\100lbs*sin(50)=76.60lbs

50 pounds (lb) force, 160° angle:

50lbs*cos(160)=-46.98lbs\\50lbs*sin(160)=17.10lbs

So,

For x-axis forces we have:

64.28lbs (positive direction)

-46.98lbs (negative direction)

Then,

64.28lbs-46.98lbs=17.3lbs (positive direction)

Fox y-axis forces we have:

76.60lbs (positive direction)

17.10 lbs (positive direction)

Then,

76.60lbs + 17.10 lbs =93.7lbs (positive direction)

So, we have the two components values of the acting force:

17.3 lbs for the x-axis and 93.7 lbs for the y-axis.

Therefore,

We have to calculate the angle between both resultant force components:

Let's calll it α

So,

\alpha=tan^{-1}(\frac{y-axisValue}{x-axisValue})=tan^{-1}(\frac{93.7}{17.3})\\\alpha=79.5=80

Hence, the angle between both resultant force components is 80 °, meaning that the resultant force direction is positive, above the x-axis.

Now we have to calculate the magnitude of the resultant force since the sum of both resultant force components is equal to the hypotenuse of the formed triangle, we have that:

sin(\alpha)=\frac{y-axisValue}{ResultantForceMagnitude}=\frac{93.7lbs}{ResultantForceMagnitude}\\\\ResultantForceMagnitude=\frac{93.7lbs}{sin(80)}=95.14lbs

So, we have that:

  • Resultant force magnitude is equal to 95.14 lbs
  • Direction is 80° respect to the x-axis.

Have a nice day!

8 0
3 years ago
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12 points help fast I need help
dimaraw [331]

Answer:

  • False, False, True, True

Step-by-step explanation:

1

  • IQR's
  • Ride A: 30 - 20 = 10
  • Ride B: 30 - 10 = 20
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2

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  • Ride A: 25
  • Ride B: 20
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3

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  • Ride B: 35 - 0 = 35
  • TRUE, as 40 > 35

4

  • Minimum
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Estimated the find the product of 416x9=
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The answer to this question is 3744
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