which situation represents a proportional relationship between the hours worked and amount for mat and Jane explained

Mathematics

1 answer:

Romashka-Z-Leto [24]4 years ago

3 0

You have to show the situation relationship in a picture

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Find the center, vertices, and foci of the ellipse with equation 2x2 + 9y2 = 18.

vovangra [49]

We have that
2x² + 9y²<span> = 18------> divided by 18
so
</span>2x² /18+ 9y²/18 = 18/18------> x/9² + y²/2 = 1

Part a)
the equation of the ellipse if of the form
(x-h)²/a²+(y-k)²/b²=1
where (h,k) is the center
in this problem
(h,k) is (0,0) ------> is the origin
a²=9------> a=3
b²=2-----> b=√2

Part b)
vertices are
(h+a,k) and (h-a,k)
(0+3,0)-----> (3,0)
(0-3,0)----> (-3,0)

Part c)
foci are
(h+c.k) and (h-c, k)
where
c²=a²-b²-----> c²=9-2-----> c²=7-----> c=√7

the foci are
(0+√7, 0)-----> (√7,0)
(0-√7,0)------> (-√7,0)

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4 years ago

A school surveyed its students about TV viewing. The average time spent watching TV each day was 3 hours. What percent of 24 hou

lora16 [44]

12.5%. You find this by taking the number of hours spent watching tv and the total number hours in a day and dividing them into each other, the number watched goes on top. Then to convert to a percent move the decimal place 2 spaces to the right, so .125 becomes 12.5%.

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Will mark brainlist plz anwser

never [62]

The width of the court is 30 feet!

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if Judy used 45 ounces of orange juice concentrate to make the fruit punch how many ounces of lemonade concentrate does she use?

elena-s [515]

Answer:

25 ounces of Lemonade concentrate.

Step-by-step explanation:

Here is the complete question: Judy use 5 ounces of lemonade concentrate for every 9 ounce of orange juice. If f Judy used 45 ounces of orange juice concentrate to make the fruit punch how many ounces of lemonade concentrate does she use?

Given ratio that Judy use is 5 ounces of lemonade concentrate to 9 ounces of orange juice.

∴ ratio for lemonade concentrate to orange juice= $\frac{5}{9}$

Now finding proportion of lemonade concentrate, if judy use 45 ounces of orange juice to make fruit punch.

$\frac{Lemonade\ concentrate}{orange\ juice} = \frac{5\ ounces}{9\ ounces} = \frac{Lemonade\ concentrate}{45\ ounces}$

Cross multiplying both side.

∴ Lemonade concentrate required = $\frac{5}{9} \times 45= 25\ ounces$

Hence, Judy require 25 ounces of Lemonade to make fruit puch if she use 45 ounces of orange juice.

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Let the joint pmf of X and Y be f(x,y)=1/4, (x,y)∈S={(0,0),(1,1),(1,−1),(2,0)}. (a) Are X and Y independent? (b) Calculate Cov(X

MrMuchimi

Answer:

rtdjhvjhfdtktcfyukch

Step-by-step explanation:

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