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never [62]
3 years ago
11

Can someone please help me

Mathematics
1 answer:
Feliz [49]3 years ago
7 0

Answer:

x = 123°

Step-by-step explanation:

Since B and D are parallel lines, then

x and 123° are corresponding angles and congruent, thus

x = 123°

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Two number cubes are rolled. What is the probability that the sum of the numbers rolled is either 3 or 9?
MariettaO [177]

|\Omega|=6^2=36\\ |A|=\underbrace{2}_{\text{the sum is 3}}+\underbrace{4}_{\text{the sum is 9}}=6\\\\ P(A)=\dfrac{6}{36}=\dfrac{1}{6}\approx17\%

7 0
3 years ago
Can anyone help with these ? I'll give brainlyiest to anyone that can help with all of them! :) Thank you in advance .
Julli [10]

Answer:

1. (a) A function is a mapping f:x\rightarrow y where there should be different values of y for different x.

So, given ordered pairs:

(3,7), (3,8) ,(3,-2) ,(3,4) ,(3,1)

It is not a function because there are multiple y values for single x-value.

Option 2 is correct.

(b) We need to find range of the function f(x)= -4x +1

So, we have given the domain which means the value of x we will put thses given values of x to find y

Values of y is the range in a function

So, given domain is: {-5,-1,0,2,10}

When x= -5

y=-4(-5)+1=21

When x=-1

y=-4(-1)+1=5

when x=0

y=-4(0)+1=1

when x=2

y=-4(2)+1=-7

when x=10

y=-4(10)+1=39

So, Range is: {-39,-7,1,5,21}

Option 1 is correct.

(c) We have given a function v(c)=98c

Where c is the number of cup jug of milk which is 16.

Put c=16 in given function

v(c)=98\cdot 16

v(c)=1568

So, c=16, v(c)=1568 is reasonable domain and range of the function.

Option 1 is correct.

(d) We need to find the inverse of given ordered pairs (1,2) (3,4) ,(6,8)

So, the inverse means values of x and y interchange.

So, the required inverse is: (2,1) ,(4,3) ,(8,6)

Option 3rd is correct.

2. We need to find the inverse of given scatter plot in which we have to find the inverse

So, given scatter plot represents (-4,-2) ,(1,-1) ,(2,1) ,(3,2)

So, in inverse values of x and y interchange

So, inverse scatter plot should represent (-2,-4) ,(-1,1) ,(1,2), (2,3)

Attached is the scatter plot inverse

Graph 1 is correct.

3.We have been given a function:

f(x)=3x

So, f(x)=y

That is y=3x

We will find x from above equation we get

x=\frac{y}{3}

Now, interchange x and y

y=\frac{x}{3}

\Rightarrow f(x)=\frac{x}{3} is the required inverse

Therefore, option 3rd is correct.

5 0
2 years ago
Solve for x. Round your answer to the nearest tenth if necessary.
posledela

Answer: 15.9

Step-by-step explanation:

7 0
1 year ago
Physics! Someone help me! Its due today please!
icang [17]

Step-by-step explanation:

We have,

Mass of ball is 9 kg

Initial speed, u = 5 m/s

Final speed, v = -2 m/s (negative as it bounces off)

(a) The change in velocity of the bowling ball is :

\Delta v=v-u\\\\\Delta v=-2-5\\\\\Delta v=-7\ m/s

(b) Change of momentum of the ball is :

p=m\Delta v\\\\p=90\times (-7)\\\\p=-630\ kg-m/s

|p| = 630 kg-m/s

(c) Impulse momentum theorem states that the change in momentum of the ball is equal to the impulse exerted on the ball. So, impulse is 630 kg-m/s.

(d) Impulse is also given by :

J=F\times t\\\\F=\dfrac{J}{t}\\\\F=\dfrac{630}{0.3}\\\\F=2100\ N

6 0
3 years ago
The state of Colorado is shaped like a rectangle with an approximate width of 280 mi and length of 380 mi. What is the populatio
IrinaK [193]

Answer:


Step-by-step explanation:

160miles • 330miles= 52,800square miles

 

Now it wants the population density in people per square miles, so you need to divide the population by the number of square miles.  

 

4779736/52800=90.5 which is about 91people per square mile.  


5 0
3 years ago
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