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2 years ago

Need the answer for x and y

Mathematics

2 answers:

d1i1m1o1n [39]2 years ago

8 0

Answer:

x = 7°

y = 10°

Step-by-step explanation:

7x = 49

x = 7°

180 = 13y + 1 + 49

combine like terms:

13y = 130

y = 10°

nevsk [136]2 years ago

5 0

Answer:

X equals to 7 & y equals to 10 'cause ;

7X=49

X=7

50 + 13 y + 1 = 180

13y = 130

y=10

Step-by-step explanation:

Good luck.

hope it was helpful for u .

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The intercept with the y-axes occurs when x = 0

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So intercept with x axes is the point (0,75)

The intercept with the x-axes occurs when y=0

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As there’s no direct way to find x, we can use the Bhaskara formula:

x=(-b+- square root (b2-4ac))/(2a)

This formula is for: ax2 +bx + c = 0

So:

a=2

b=35

c=75

x=(-35+- square root (35^2-4*2*75))/(2*2)

So x can be -2.5 or -15

So intercept with y axes are the points (-2.5,0) and (-15,0)

And there is also a formula to find the mínimum. The mínimum is always the vertex:

Xv = -b/(2*a) = -35/(2*2) = -8.75

Yv = f(Xv) = f(-8.75) = 2(-8.75)^2 + 35(-8.75) + 75 = -78.125

So the minimum is the point (-8.75, -78.125)

You can easily verify all these data with a graphic software such as GeoGebra.

Here is the complete list of all the points we need to see:

(0,75); (-2.5,0) ; (-15,0), (-8.75, -78.125)

So the mínimum X has to be -15 and the máximum X has to be 0

and the mínimum Y has to be -78.125 and the máximum Y has to be 75

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Answer:

$\mu = 12.1\\\sigma = 0.3$

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So, P(11.6<x<11.9)= P(x<11.9)-P(x<11.6)

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P(-1.67<z<-0.67)= P(z<-0.67)-P(z<-1.67)

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$z=\frac{12.6-12.1}{0.3}$

$z=1.67$

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Answer = No, because the probability that a drink containing more than 12.6 fluid ounces is less than 0.05, this event is not unusual.

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