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NNADVOKAT [17]
3 years ago
9

Pls help I need a good grade

Mathematics
1 answer:
aksik [14]3 years ago
3 0

Hello~

I used Cymath for this!

https://www.cymath.com/answer?q=(0.4%20*10%5E-6)%20(0.7%20*%2010%5E-2)

In short the answer is B.

The link has the step by step answers!

I highly recommend this sight by the way, its always correct!

Ary~

 

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Determine if y varies directly with x. Give the constant of variation, when appropriate. (picture below)
maxonik [38]

Based on the given variation, y does not vary directly with x and the constant of variation are 8, 3.2 and 1.25 respectively.

<h3>Variation</h3>

y = k × x

where,

k = constant of proportionality

y = -40

x = -5

y = k × x

-40 = k × -5

-40 = -5k

k = -40/-5

k = 8

when,

y = 8 and x = 2.5

y = k × x

8 = k × 2.5

8 = 2.5k

k = 8/2.5

k = 3.2

when,

y = 5 and x = 4

y = k × x

5 = k × 4

5 = 4k

k = 5/4

k = 1.25

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5 0
2 years ago
What’s the area of this trapezoid?
Sonja [21]

Answer:

area = 105 hm2

Step-by-step explanation:

area = (base1 + base2) * heigth / 2= (14 +16)*7 / 2 = 105 hm2

3 0
4 years ago
Conner has 3 3/8 bags of mulch. if each bag covers 12 1/2 square feet , how many square feet can he cover?
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Answer:

42 square feet???

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4 years ago
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There are eight shirts in your closet, three blue, two are black, one is green, and two are white. You randomly select one to we
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The probability of wearing blue shirts on both days is 3/28.

<h3>What is probability?</h3>

Probability is the measure of the likelihood of an occurrence.

Given:

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P(blue on Monday) = 3/8

Now, 7 shirts are left to wear on Tuesday

P(blue on Tuesday) =2/7

So,

the probability of wearing blue shirts on both days = 3/8 * 2/7 = 3/28

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4 0
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Black_prince [1.1K]
X - the number of sandwiches
y - the number of soups

x+y=18 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \  |\times (-4.5) \\&#10;7.75x+4.5y=113.5 \\ \\&#10;-4.5x-4.5y=-81 \\&#10;\underline{7.75x+4.5y=113.5} \\&#10;7.75x-4.5x=113.5-81 \\&#10;3.25x=32.5 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \  |\div 3.25 \\&#10;x=10

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3 years ago
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