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3 years ago

PLEASE SOMEONE HELP ME WITH THESE MATH QUESTIONS!!! VERY URGENT IF YOU ANSWER CORRECTLY, YOU'LL GET 10 POINTS!

Mathematics

1 answer:

Tasya [4]3 years ago

7 0

Answer:

Question 21: C.

Question 22: I.

Question 23: E.

Question 24: B.

Step-by-step explanation:

#21: The first statement is presented in the "Given" section.

#22: Since the reflexive property states that anything is equal to itself, BC ≅ BC.

#23: C being the midpoint of AD means that C is the same distance from both point A and point D. This then means that AC ≅ CD.

#24: AB ≅ DB due to the given, BC ≅ BC (since it's the same side), and we've proven that AC ≅ CD using a midpoint. We've proven all three sides on the two triangles to each other are congruent. This means that we've proven the triangles using SSS, which is B.

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which of the following is the most appropriate unit to describe the rate at which people are entering a theme park A. hours per

Aleksandr-060686 [28]

People per hour because the dependent quantity is the hours.
The number of people that enter depends on the number of hours the park is open

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3 years ago

Read 2 more answers

Find the equation of the line of the circle passing through the points (1,2) (3,-4) (5,-6)

Cerrena [4.2K]

Answer:

(x-11)² + (y-2)² = 10²

Step-by-step explanation:

Given circle passes through

P(1,2), Q(3,-4), R(5,-6)

Assume following circle with centre O(a,b) and radius r contains P,Q,R.

(x-a)²+(y-b)² = r^2 ...........(1)

Substitute P in (1) and expand, simplify

(1-a)²+(2-b)²=r²

a²+b² -2a-4b+5-r²=0 .......(2)

Similarly, substitute Q in (1) and expand, simplify

(3-a)²+(-4-b)² = r²

a²+b²-6a+8b+25-r²=0 ...........(3)

Similarly, substitute R in (1) and expand, simplify

(5-a)²+(-6-b)² = r²

a²+b²-10a+12b+61-r²=0 ...........(4)

We can now eliminate a^2 and b^2 by simple subtractions

(2) - (3)

4a-12b-20 = 0 ..........(5)

(3) - (4)

4a-4b-36 = 0 .............(6)

Finally, (6) - (5) and solve for b

8b - 16 = 0

b=2 ..............................(7)

substitute b in (5) and solve for a

4a-12(2) -20 =0

4a=44

a=11 ................................(8)

Finally, substitute a & b in (2) to solve for r

r^2 = 11²+2²-2*11-4*2+5 = 121+4-22-8+5 = 100

r=sqrt(100) = 10 (positive value only)

therefore the equation of the circle is

(x-11)² + (y-2)² = 10²

6 0

3 years ago

This question is based on Algebra 1 solve for X 3x-4y=7

timurjin [86]

Answer:

$x=\frac{4y+7}{3}$

General Formulas and Concepts:

Alg I

Equality Properties

Step-by-step explanation:

Step 1: Define

3x - 4y = 7

Step 2: Solve for x

Add 4y to both sides: 3x = 4y + 7
Divide 3 on both sides: x = (4y + 7)/3

6 0

3 years ago

The average response time to a bank robbery is 9 minutes. A local community wants to improve on this time, so they implement adv

timurjin [86]

Answer:

The training does reduce response time at 0.05 level of significance

Step-by-step explanation:

Population mean for a population with normal distribution, where the standard deviation is known and the appropriate significant test is given then;

z=x-μ / δ/√n

where

μ= 9 minutes

x=8 minutes

δ= 4.2

n= 36

Applying the formula;

z= 8-9 / 4.2/√36

z= -1 / 4.2/6

z= -1 /0.7 = - 1.429

Perform the test where

H₀ : p=0.05 verse Ha : p < 0.05

Using the Z-table, find the probability that Z is less than -1.43.

You will find the probability of 0.0764 of Z being more than the value in test thus; there are high chances that results will be observed according to the null hypothesis

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3 years ago

!!20 POINTS!! Claire filled up her car with gas before embarking on a road trip across the country. Let G represent the number o

pentagon [3]

Answer:

$G=-\frac{5}{4}t+15$