MATHEMATICS HIGH SCHOOL

I need help, if you do help please dont put picture thank you!

Answers

Answer 1

Answer:

181

Step-by-step explanation:

Area of a semicircle: 1/2 (pi • r^2)

1/2(3.14 • 100)

1/2 ( 314 )

157

Triangle:

(6 • 8) ÷ 2

48 ÷ 2

Add the area of the triangle & semicircle together: 157 + 24 = 181

Hope this helps! Have a great day!

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2) A student uses the substitution method to solve the system of equations below algebraically.x = 4y + 5 x = 3y - 2 Which equivalent equation could be used? y = 3(4y + 5) - 2 x = 3(4y + 5) - 2 x = 4(3y - 2) + 5 4y + 5 = 3y - 2
Find the area of the figure. Round decimal answers to the nearest tenth.

A man walks along a straight path at a speed of 4ft/s. A searchlight is located on the ground 20ft from the path and is kept focused on the man. At what rate is the searchlight rotating when the man is 15 ft from the point on the path closest to the searchlight.

Answers

Now note that tan(y) = x=20,
so that sec^2y *dy/dt=1/20 dx/dt
At the instant describedin the problem,
x = 15 and the hypotenuse of the above triangle
thus has length25,
so we compute:(25/20)^2 dy/dt=1/20*4 ==>dy/dt=1/2*400/625

=16/125 rad/sec

What is the value of the expression x-6/4 when x = –26?

Answers

i got -27.5 hope i helped but could round to 28 btw or ill just keep it the same for safety reasons....:)

so you put -26 instead of x -26-6÷4=-27.5

Which of the following could identify the transformation of a parabola with a vertex of (-4, -6) to parabola with a vertex of (1, /6)

Answers

Could it be a translation of (5, 12)?

Jan's scores on five quizzes were 2, 8, 8, 9, and 10. Is the mean or median the best measure of center to summarize Jan's scores?

A.median

B.mean

C.Both mean and median summarize the data equally well.

Answers

the median is truly the middle of the data set. But the mean describes the average i want you to decide so i wont get this wrong. Thus, is the mean more important than the median according to this information?

Jim, Carla and Tomy are members of the same family. Carla is 5 years older than Jim. Tomy is 6 years older than Carla. The sum of their 3 ages is 31 years. How old is each one of them?

Answers

let the age of jim be x
carla's age= x+5
tomy's age= 6+5+x
sum of their ages=31
x+x+5+x+5+6=3x+16=31
3x=31-16
=15
x=15 divided by 3
= 5
jim's age=5
carla's age=10
tomy's age = 16

x - Jim
y - Carla
z - Tomy

$y=x+5\n z=y+6\n x+y+z=31\n\n x=y-5\n z=y+6\n x+y+z=31\n\n y-5+y+y+6=31\n 3y=30\n y=10\n\n x=10-5\n x=5\n\n z=10+6\n z=16$

To determine customer opinion of their pricing, Home Depot randomly selects 140 check out lines during a certain week and surveys all customers in the check out lines. What type of sampling is used?

Answers

Answer: Cluster sampling

Step-by-step explanation:

A cluster sampling is a kind of random sampling technique in which the researcher splits the whole population into distinct sets known as clusters.

After that, he choose a random sample of clusters from the population and do analysis on it.

In the given situation, the objective of survey : "To determine customer opinion of their pricing:".

He first divides the number of check out lines according to weeks and randomly selects 140 check out lines during a certain week and surveys all customers in the check out lines. .

(Here , check out lines = clusters )

Therefore , the type of sampling is used = Cluster sampling

Cluster sampling is used by Home Depot for a certain week and surveys all customers in the check out lines.

A cluster sampling is a kind of random sampling technique in which the researcher splits the whole population into distinct sets known as clusters.

Given, Home depot randomly selects 140 check out lines.

In the given situation, the objective of survey : "To determine customer opinion of their pricing:".

He first divides the number of check out lines according to weeks and randomly selects 140 check out lines during a certain week and surveys all customers in the check out lines. .

Here , check out lines = Clusters

Therefore , the type of sampling used is Cluster sampling .

Know more about cluster sampling,

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