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Romashka-Z-Leto [24]

2 years ago

8

What is the median score achieved by a student who recorded the following scores on 10 math quizzes 68 55 70 62 71 58 81 82 63 7

9
a 71
b 69
c 71
d 70

1 answer:

Vinil7 [7]2 years ago

7 0

Answer:

b. 68

Step-by-step explanation:

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What is the value of x in the equation of 8x - 5 = 6x + 1

ANTONII [103]

Answer:

Step-by-step explanation:

8x - 5 = 6x + 1

2x - 5 = 1

2x = 6

x = 3

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2 years ago

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JUST HELP. HATE MATH! SKSJSJD

PilotLPTM [1.2K]

Answer:

56.5

Step-by-step explanation:

its just division

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3 years ago

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Find the greatest solution for x+y when x^2+y^2 = 7, x^3+y^3=10

damaskus [11]

Answer:

4

Step-by-step explanation:

set

$f(x,y)=x+y\\$

constrain:

$g(x,y)=x^2+y^2 = 7\\h(x,y)=x^3+y^3=10$

Partial derivatives:

$f_{x}=1\\f_{y} =1 \\g_{x}=2x \\g_{y}=2y\\h_{x}=3x^2 \\h_{y}=3y^2$

Lagrange multiplier:

$grad(f)=a*grad(g)+b*grad(h)\\$

$\left[\begin{array}{ccc}1\\1\end{array}\right]=a\left[\begin{array}{ccc}2x\\2y\end{array}\right]+b\left[\begin{array}{ccc}3x^2\\3y^2\end{array}\right]$

4 equations:

$1=2ax+3bx^2\\1=2ay+3by^2\\x^2+y^2=7\\x^3+y^3=10$

By solving:

$a=4/9\\b=-2/27\\x+y=4$

Second mathod:

Solve for x^2+y^2 = 7, x^3+y^3=10 first:

$x=\frac{1}{2} -\frac{\sqrt{13}}{2} \ or \ y=\frac{1}{2} +\frac{\sqrt{13}}{2} \\x=\frac{1}{2} +\frac{\sqrt{13}}{2} \ or \ y=\frac{1}{2} -\frac{\sqrt{13}}{2} \\x+y=-5\ or\ 1 \or\ 4$

The maximum is 4

6 0

2 years ago

Does this set of ordered pairs represent a function? (-1,5)(0,-3)(2,7)(4,0)(7,5)

ruslelena [56]

Answer:

No

Step-by-step explanation:

You cant have 2 y values

6 0

2 years ago

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Barry’s Bagel Emporium sells a dozen bagels for $5.00. This price is no longer high enough to create a profit. The owner decides

katen-ka-za [31]

Answer:

Plan C will be the fastest - it will take 10 weeks

Step-by-step explanation:

Plan A will take 60 weeks

Plan B will take the longest 104 weeks

Plan D will be the fastest - it will take 12 weeks

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2 years ago