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azamat
3 years ago
7

An experiment involves 30 participants. From these, a group of 4 participants is to be tested under a special condition. How man

y groups of 4 participants are possible?
Mathematics
1 answer:
zheka24 [161]3 years ago
6 0

Answer:

7

Step-by-step explanation:

7*4=28 which is the closest u can get to 30 with out going past it

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Write an equation in point-slope form for the line through the given point that has the given slope.
valkas [14]

Answer:

y=mx+b is the formula. So -8=-3x+5 would be the answer..

since (x,y) just substitute these numbers you have it into the formulas... Take y from (5,-8) and place it into y=mx+b. Next take the slope which is -3. And then since its a postive number we <em>add</em> are x from (x,y). -8=-3x+5. We also add x next to the slope (-3) becuase we are trying to solve for x. And we <em>always</em> put it next to the slope. Hope this helps!

6 0
3 years ago
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A farmer is designing a field for his new horse. In order for the field to fit into his farm, the angle θ must be less than 40◦,
vovangra [49]

Answer:

The field will not fit

Step-by-step explanation:

To find the angle, we will use cosine rule;

c² = (a² + b² - 2abcosC)

C in this case is θ

Thus;

15² = (8² + 20² - 2(8 × 20)cos θ)

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cos θ = 239/320

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Thus angle is not less than 40° as recommended. Thus, the field will not fit.

5 0
3 years ago
The elevation of lake sam rayburn is 164 above mean sea level during the summer if it does not rain the elevation of the lake de
andrew-mc [135]

Answer:

I guess that you want to model the elevation of Lake Sam Rayburn.

During the summer, it is 165 ft above the sea level (the sea level is our position 0ft).

If it does not rain, the elevation of the lake decreases by 0.5ft each week.

So if we assume that there is no rain, we can write the elevation fo the lake as a linear relationship with slope equal to -0.5ft and y-intercept equal to 165ft.

L(w) = 165ft - 0.5ft*w

Where w is the number of weeks without rain, if we have 0 weeks without rain, then the level of the lake remains constant at 165ft above sea level,

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4 0
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Orlov [11]
Fourty Five and two hundred and three ten thousandths
7 0
3 years ago
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Multiply
kykrilka [37]

Answer:

9/5

Step-by-step explanation:

3 x 3/5 = 9/5

9/5 can't be simplified

7 0
3 years ago
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