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lbvjy [14]
3 years ago
10

#4 &16 I need help Emergency ​

Mathematics
1 answer:
shepuryov [24]3 years ago
4 0

Answer:

What grade are you in

Step-by-step explanation:

wgat grade are you in so i can help you.

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What is standard form for (2tens 1one)X10
Tcecarenko [31]
The standard form for 2 tens and 1 ones (21) times 10 is 210
6 0
4 years ago
It is known that for all tests administered last​ year, the distribution of scores was approximately normal with mean 74 and sta
Lunna [17]

Answer: 19.77%

Step-by-step explanation:

Given: Mean : \mu=74

Standard deviation : \sigma = 7.1

The formula to calculate z-score is given by :_

z=\dfrac{x-\mu}{\sigma}

For x= 80, we have

z=\dfrac{80-74}{7.1}\approx0.85

The P-value = P(z>0.85)=1-P(z

In percent , 0.1976626\times100=19.76626\%\approx19.77\%

Hence, the approximate percentage of the test scores during the past year exceeded 80 =19.77%

6 0
3 years ago
How do you solve this? please help me guys!
azamat
3y -2 > 5
3y -2 +2 > 5+2
3y > 7
y > 7/3

6 0
4 years ago
Read 2 more answers
The area of a circle is 28.26 square centimeters. What is its diameter (use 3.14 for ð)?
horsena [70]
Area for circle is  πr² so πr² =28.26 and we can sub 3.14 as pi
3.14*r²=28.26 we can divide by 3.14 to get r² on it's own
r²=28.26/3.14
then we root both sides to get r on it's own
28.26/3.14=9 √9=3
and the diameter is double the radius 3*2=6 so the diameter is 6

5 0
3 years ago
The length of a rectangle is 3 cm greater than its width. the perimeter is 25 cm. what are the dimensions of the rectangle?
slega [8]
P = 2(L + W)
P = 25
L = W + 3
now we sub and solve
25 = 2(W + 3 + W)
25 = 2(2W + 3)
25 = 4W + 6
25 - 6 = 4W
19 = 4W
19/4 = W
4.75 = W <== width = 4.75 cm (or 4 3/4 cm)

L = W + 3
L = 4.75 + 3
L = 7.75 <== length = 7.75 cm (or 7 3/4 cm)
7 0
3 years ago
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