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Digiron [165]
4 years ago
8

PLEASEEEEE HELP ME

Mathematics
2 answers:
Nadya [2.5K]4 years ago
4 0

c. 44.25 trust me I just took the test.

Drupady [299]4 years ago
4 0

Answer:

The correct option is C.

Step-by-step explanation:

The general form of linear regression equation is

y=a+bx           .... (1)

where,

b=\frac{\sum_{i=1}^nx_iy_i-n\overline{x}\overline{y}}{\sum_{i=1}^nx_i^2-n\overline{x}^2}

a=\overline{y}-b\overline{x}

Using the graphing calculator, we get

a=0.0142857

b=2.01071

Substitute the values of a and b in equation (1).

y=0.0142857+2.01071x

The equation of line of best fit is y=0.0142857+2.01071x, where x is number of years and y is height of trees.

Substitute x=22 to find the height of trees after 22 years.

y=0.0142857+2.01071(22)

y=44.2499057

y=44.25

The height of trees after 22 years is 44.25 ft. Therefore the correct option is C.

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A random sample of 20 students from both the Science and Math club were surveyed about what supplies they would like to purchase
alekssr [168]

Answer:

<u>84 students </u>

Step-by-step explanation:

See the attached table

As shown there are 20 students from Math club, 7 of them would like to choose calculators.

so, the probability of students who choose calculators = 7/20

If there are 240 students in the Math club

So, the number of students expected to choose calculators = 240 * 7/20

<u>So, the number of students = 84 students </u>

6 0
3 years ago
Cathy used a probability simulator to pull 3 colored marbles from a bag and flip a coin 50 times. The results are shown in the t
aliya0001 [1]

Answer:

blue marble 12/50. tails 20/50

Step-by-step explanation:

12/50×20/50 =240/2500= 12/125 =9.6%

5 0
3 years ago
In ΔKLM, k = 5.1 cm, l = 6.4 cm and m=3.6 cm. Find the area of ΔKLM to the nearest 10th of a square centimeter.
NeTakaya

Answer:

eIn ΔKLM, k = 5.1 cm, l = 6.4 cm and m=3.6 cm. Find the area of ΔKLM to the nearest 10th of a square centimeter.

Step-by-step explanation:

ee

3 0
3 years ago
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GOT A BUNCH OF UNANSWERED QUESTIONS THAT NEED ANSWERING ON MY PROFILE
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Answer:

okay I'll try to answer it

4 0
3 years ago
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Please help.. I will give points
Daniel [21]

A. 8^9/2= around 11585.2375; (sqrt8)^9= around 11585.2375. So choice A shows a pair of equivalent expressions.

B. (3sqrt125)^9=1,953,125; 125^9/3=1,953,125. So choice B also shows a pair of equivalent expressions.

C. 12^2/7= around 2.03394; (sqrt12)^7= around 5,985.96759. So choice C does not show a pair of equivalent expressions.

D. 4^1/5=around 1.31951; (sqrt4)^5=32. So choice D also doesn't show a pair of equivalent expressions.

Your answers are A and B.

I hope this helps ;)

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4 years ago
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