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blagie [28]
3 years ago
12

The California Board of Education wants to know how 5th grade students are doing in math this year. They get a list of all 5th g

raders
in the state of California and look at the overall math grades of every 10th student on the list. Then they add the scores and divide to
get an average. What kind of sampling is this?
Mathematics
1 answer:
kolbaska11 [484]3 years ago
3 0

Answer: I think random sample

Step-by-step explanation:

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A rectangular garden 6 meters wide has a diagonal measuring 10 meters. find the perimeter of the garden.
FromTheMoon [43]
The perimeter would be:
 6+6+10+10
12+20
perimeter= 32
HOPE THIS HELPS YOU! ^_^
7 0
3 years ago
Last one!! I need the steps please! Will mark brainliest!
hoa [83]

Answer:

h(t)=-6(t-2)^2+24

Step-by-step explanation:

Given function:

h(t)=-6t^2+24t

where:

  • h = height (in feet)
  • t = times (in seconds)

Rewrite in the form h(t)=a(t-h)^2+k

The quickest way to do this is to expand h(t)=a(t-h)^2+k and compare coefficients with the original function.

\begin{aligned}h(t)& =a(t-h)^2+k\\ & = at^2-2aht+ah^2+k\end{aligned}

Comparing coefficients with h(t)=-6t^2+24t

\begin{aligned}\implies at^2& =-6t^2\\ a &=-6\end{aligned}

\begin{aligned}\implies -2aht & =24t\\ -2(-6)ht& =24t\\ 12ht & = 24t\\ 12h & = 24\\ h & = 2\end{aligned}

\begin{aligned}\implies ah^2+k & = 0\\(-6)(2)^2+k &=0\\ -24+k & =0\\ k &=24 \end{aligned}

Therefore, substituting the found values into the equation:

h(t)=-6(t-2)^2+24

6 0
2 years ago
A negative number is ______ a positive number
yawa3891 [41]
A negative number is the inverse of a positive number and a negative number is smaller than a positive  hope this help
5 0
3 years ago
Solve for x<br> 3(2х-3) + 4(2-x) = 0
defon

Answer:

x=.5

Step-by-step explanation:

6x-9+8-4x=0

6x-4x=2x

-9+8=-1

2x-1=0

2x=1

x=.5

5 0
3 years ago
Read 2 more answers
A collection of dimes and quarters is worth $6.50. There are 35 coins in all. How many dimes are there. Work it out with two equ
zimovet [89]
D + q = 35....d = 35 - q
0.10d + 0.25q = 6.50

0.10(35 - q) + 0.25q = 6.50
3.50 - 0.10q + 0.25q = 6.50
-0.10q + 0.25q = 6.50 - 3.50
0.15q = 3
q = 3 / 0.15
q = 20 <=== 20 quarters

d + q = 35
d + 20 = 35
d = 35 - 20
d = 15 <=== 15 dimes
6 0
3 years ago
Read 2 more answers
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