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Vedmedyk [2.9K]
3 years ago
14

What is the value of the x variable in the solution to the following system of equations?

Mathematics
1 answer:
Elden [556K]3 years ago
6 0
-2 (x-2y=-5)

-2x+4y=10
2x+3y=4
0+7y=14
/7. /7
y=2

2x+3 (2)=4
2x+6=4
-6. -6
2x=-2
/2. /2
x=-1

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5. The dimensions, in inches, of a shipping box at We Ship 4 You can be expressed as width x, length x + 5, and height 3x - 1. T
meriva
The volume of a cuboid is given by length × width × height

We have:

Volume = 7.6 ft³
Height = 3x - 1
Length = x + 5
Width = x

Substituting these into the formula, we have:

7.6 = (3x - 1) (x + 5) (x)
7.6 = [3x² + 15x - x - 5] (x)
7.6 = [3x² + 14x - 5](x)
7.6 = 3x³ + 14x² - 5x
0 = 3x³ + 14x² - 5x - 7.6

Drawing the graph is one way of finding the solution (refer to the graph below):

We have three solutions (where the curve crosses the x-axis):
x = -4.9
x = -0.6
x = 0.8

Putting these solutions back into the context, since we are looking for the value of x which is part of measurement of length, we cannot have negative value, so we will take the value of x = 0.8 ft

Converting  0.8 ft into inches = 0.8 × 12 inches = 9.6 inches

Answer: x = 9.6 inches

7 0
3 years ago
Need help on this question please!
Alja [10]

Answer: she made 11 sparkelers and gavin made 21

Step-by-step explanation:

4 0
3 years ago
I need work shown please help (I will mark as brainliest)
JulsSmile [24]

Answer:

for the second page the answer is B the third page is D

Step-by-step explanation:

  • 15 x 10 x 8 = 1200
  • 24 + 25 (49 + 64 + 55)= 168

  • Hope this helps
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7 0
3 years ago
SOMEONE PLEASE HELP ME WITH THIS !!!!!!
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Answer:

36 stickers

Step-by-step explanation:

7 erasers in each bag

7 x 3 bags = 21 erasers total

57 - 21 =36

Equation:

Total items = 7x + 12y

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Rachel runs 3.2 miles each weekday and 1.5 miles each day of the weekend how many miles will she have run in six weeks
navik [9.2K]
3.2 x 5 + 1.5 x 2 = 19
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