Question

is anyone willing to help me with a math practice ? going to take some time because there is 25 questions

Answer 1

@heybhai can you help?

Answer 2

@tayloranne50 if the work is not urgent you can mail me at rogerspoj@gmail.com.I will send you all with detailed solution tonight

Answer 3

it has to be turned in within an hour before my teacher leaves. i need help now.

Answer 4

@heybhai

Answer 5

i'll try to help you, but i want you to post what you think the answers are first

Answer 6

okay.
the ordered pairs (0,1), (1,4), (2,16), (3,64) and (4,256) represent a function. what is a rule that represents this function?
a. y = x^4
b. y = 4x
c. y = x + 4
d. y = 4^x
im gonna say c.

Answer 7

okay @tayloranne50 send all your queries now

Answer 8

c is not the answer but if you take the first point, (0,1), and put it into c, it's not true. 1 = 0 + 4? no

Answer 9

because* not but

Answer 10

b?

Answer 11

1 = 4(0)? no

Answer 12

d?

Answer 13

yes, it's d lol. i hope you're not just giving out random guesses

Answer 14

Suppose tuna is on sale for $0.90 a can and you have a coupon for $0.40 off your total purchase. Write a function rule for the cost of N cans of tuna

A. C(n)=0.90n-0.40
B. C(n)=0.40n-0.90
C. C(n)=(0.90+n)-0.40
D. C(n)=(0.40+n)-0.90
for this one i think its b but im not positive.

Answer 15

b is saying that a can is 0.40 and you have a coupon for 0.90 off...so b is backwards

Answer 16

so then it has to be a?

Answer 17

yes, it's a

Answer 18

determine which of the mapping diagrams represents a relation that is not a function.
for this one i think b but i also got confused.

Answer 19

@AriPotta do you know?

Answer 20

the first one doesn't pass the vertical line test, so a is not a function

Answer 21

tell whether the sequence is arithmetic. if it is, what is the common difference?
-12, -7, -2, 3 . . .
a. yes; 5
b. yes; 8
c. yes; 3
d. no
i think its d.

Answer 22

it is arithmetic and the difference is 5. -12 + 5 = -7, -7 + 5 = -2, and so on

Answer 23

so a?

Answer 24

yes

Answer 25

id say a.

Answer 26

why do you think it's a

Answer 27

actually i would say d because when i multiply it doesnt come out right when i use the numbers in the other answers.

Answer 28

exactly, i got that too. i'd say d as well

Answer 29

what is the graph of the function rule.
i have no clue about this one.

Answer 30

the answer is graph d. it ends in + 2, so the vertex has to be at (0,2) and it's positive, so it's going upward, not downward

Answer 31

im not sure about this one either.

Answer 32

@tayloranne50 do note that mode function || creates graph in V shaped and as the value inside is +ve its upward as @AriPotta told

Answer 33

For verification purpose only @tayloranne50 use graph.tk

Answer 34

so for this one, we wanna convert the equation into slope-intercept form. that way, it's easier to graph. slope-intercept form is y = mx + b

Answer 35

by looking at them i think its b.

Answer 36

once you convert it into slope-intercept form, you get y = 3x + 4. so the slope is positive. knowing that, we can rule out choices a and b based on this

Answer 37

by also looking at our equation, we see that the line has a y-intercept of 4. so it must pass through the point (0,4). so which graph shows a line with a positive slope and a y-intercept of 4?

Answer 38

d?

Answer 39

yes :)

Answer 40

find the slope of the line.
i would say b

Answer 41

take 2 points off the line and use the slope formula: \[\frac{ y _{2}-y _{1} }{ x _{2}-x _{1} }\]
i'm going to use points (-1,3) and (0,-1)
\[\frac{ 3-(-1) }{ -1 - 0 }=~\frac{ 3 + 1 }{ -1 }=~\frac{ 4 }{ -1 }=~-4\]

Answer 42

what is the slope of the line that passes through the pair of points?
(-2,1), (2,17)
a. 4/17
b. -15
c. -4
d. 4

Answer 43

im not sure about this one

Answer 44

use the slope formula m8
\[\frac{ y _{2}-y _{1} }{ x _{2}-x _{1} }\]

Answer 45

c??

Answer 46

(-2,1) (2,17)

\[\frac{ 17-1 }{ 2-(-2) }=~\frac{ 16 }{ 4 }=~4\]

Answer 47

what are you doing to get your answers?

Answer 48

i did -17 - 1 for some reason.

Answer 49

i mixed it up.

Answer 50

oh ok

Answer 51

a. -2
b 0
c 2
d undefined
id say a.

Answer 52

remember that picture i uploaded?

Answer 53

looking at that, and then at the graph, what do you think the answer is

Answer 54

so b?

Answer 55

yes, b

Answer 56

im not sure about this one.

Answer 57

point-slope form is y - y1 = m(x - x1). so it gives us a point (-4,6) and the slope, 3/4. put them into the formula and tell me what you get

Answer 58

d?

Answer 59

no, y - 6 = 3/4(x + 4) which is c

Answer 60

i think d.

Answer 61

no. first take two points from the table and find the slope

Answer 62

after you have the slope, take one point and put the info into point-slope form. then convert it into slope-intercept form

Answer 63

im not sure. i only have 15 minutes left to do this and still have like 10 problems.

Answer 64

idk how to do that,

Answer 65

use points (2,8) and (4,15). use the slope formula.\[\frac{ y _{2}-y _{1} }{ x _{2}-x _{1} }\]tell me what you get

Answer 66

2,7?

Answer 67

\[\frac{ 15-8 }{ 4-2 }=~\frac{ 7 }{ 2 }\]

Answer 68

so that immediately eliminates choices c and d

Answer 69

b?

Answer 70

now i'm going to use (2,8) and our slope 7/2 in the point-slope form, which is y - y1 = m(x - x1)
y - 8 = 7/2(x - 2)

now convert it into slope-intercept form, which is y = mx + b
y - 8 = 7/2x - 7
y = 7/2x + 1, which is choice a.

Answer 71

write y = -1/2 x + 1 in standard form using integers.
a. x + 2y = -2
b. x - 2y = -2
c. 2x + y = -2
d. x - 2y = 2

C.

Answer 72

so standard form is ax + by = c where a is not negative or a fraction

y = -1/2x + 1

add 1/2x to both sides
1/2x + y = 1

since a can't be a fraction, multiply both sides by 2
x + 2y = 2

Answer 73

that's strange...it's not one of the choices. but i know that's the answer

Answer 74

y = -1/2x + 1is what the problem is. not sure why its not one of the choices.

Answer 75

i have to go walk my dog. i think you might want to get help from someone else while i'm gone. i'll probably be like 5 - 10 min