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stepladder [879]
4 years ago
14

Identify the sampling technique used:35 sophomores, 24 juniors, and 25 seniors are randomly selected from 388 sophomores, 418 ju

niors, and 573 seniors at a certain high school.
Mathematics
1 answer:
aleksley [76]4 years ago
8 0
Hey Hey!

I believe the type of sampling technique used is; Stratified sampling.

~Hope this helps!
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If 4/7 of a ton of concrete covers 7/8 of a bridge, how many tons of concrete are required to cover the entire bridge
Studentka2010 [4]

Answer

32/49

Step-by-step explanation:

4/7 tons = 7/8 x

4/7 / 7/8

32/49

7 0
4 years ago
What number is greater 17 or 20/5
gtnhenbr [62]
Hey there!

17 is greater than 20/5 because 20 divided by 5=4
7 0
3 years ago
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PLEASE HELP! What is the value of x in the equation below?
Svetlanka [38]

Answer:

C. 20

Step-by-step explanation:

We have to isolate x.

6(x - 8) = 72

Distribute 6.

6x - 48 = 72

Add 48 to both sides.

6x = 120

Divide both sides by 6.

x = 20

7 0
3 years ago
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Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following
vivado [14]

Answer:  (-0.4, 6.8)

The graph is attached

Step-by-step explanation:

We can find the axis of symmetry using the formula x = -b/2a

x = - -4/2(-5)

x = 4/-10

x = 0.04

Substitute for x and calculate y

y = \left(0.4^{2}\right)\left(-5\right)-4\left(-0.4\right)\ +6

y = 6.8

3 0
3 years ago
15 = 5(1 - m) - 2(1 - m)<br> What is the value for m
earnstyle [38]

Answer:

m = -4

Step-by-step explanation:

First you have to deal with the right side of the equation since it's not spread out.

You therefore have to distribute (in order)

5×1= 5,

5×-m= -5m

And

-2×1 = -2

-2×-m = 2m

Now set it up in the order it was at first (not necessary, but helpful)

15 = 5-5m-2+2m

Add the common values...

5-2= 3

-5m+2m= -3m

Your equation should now look like this:

15= 3-3m

At this point you need to get the common values on the same side, so you would subtract 3 from both sides

15-3= 12

3-3= 0

Since you the 3 cancelled out on the right side, your equation now looks like this:

12= -3m

(Or -3m= 12)

At this point you only need to get m by itself so you would divide by -3 on both sides

-3m/-3= m (or 1m: m is understood as such)

12/-3= -4

The final answer should be

m = -4

6 0
3 years ago
Read 2 more answers
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