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nydimaria [60]
3 years ago
11

t is estimated that Americans buy 2.92×1010 bottles of water per year. At this rate, how many bottles of water are purchased by

Americans each day? Express your answer in scientific notation.
Mathematics
1 answer:
Mumz [18]3 years ago
4 0
8<span>×10^7 hope this helped</span>
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For the system of equations:<br> -4s + 2t = -5<br> 8s - 6t=7<br> What is the value of s?
dedylja [7]

Answer:

s = 2

Step-by-step explanation:

I'll be using the substitution method.

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2 years ago
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What are the solutions to the following system of equations?<br><br> x − y = 6<br> y = x2 −6
anastassius [24]

The solutions to the given system of equations is (0, -6) and (1, -5)  

<h3>Simultaneous equations</h3>

From the question, we are to determine the solutions to the given system of equations

The equations are

x − y = 6 --------- (1)

y = x² −6 ---------- (2)

From equation (1)

x - y = 6

∴ x = 6 + y ------- (3)

Substitute into equation (2)

y = x² −6

y = (6+y)² −6

y = (6+y)(6+y) -6

y = 36 + 6y + 6y +y² -6

y = 36 + 12y + y² - 6

Simplifying

y² + 12y - y + 30 = 0

y² + 11y + 30 = 0

Solve quadratically

y² + 11y + 30 = 0

y² + 6y + 5y + 30 = 0

y(y +6) +5 (y +6) = 0

(y + 5)(y + 6) = 0

y + 5 = 0 OR y + 6 = 0

y = -5 OR y = -6

Substitute the values of y into equation (3)

x = 6 + y

When y = -5

x = 6 + (-5)

x = 6 -5

x = 1

When y = -6

x = 6 + (-6)

x = 6 -6

x = 0

∴ When x = 0, y = -6 and when x = 1, y = -5

Hence, the solutions to the given system of equations is (0, -6) and (1, -5)  

Learn more on Solving simultaneous equations here: brainly.com/question/16863577

#SPJ!

7 0
2 years ago
Please help, 50 points, will crown brainliest
VashaNatasha [74]
  • Answer:Q1 27.6363636          Q2 304/11 = q1 answer

Step-by-step explanation:

8 0
3 years ago
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