Plz help!!!

A.) is the relationship a function?

B.) explain your answer. Use words “input” and “output”.

C.) Rachel plans to study 2 hours for her next exam. Will plotting her grade on the same graph change your answer to part a?
- No, it will stay a function
- Yes, it would change to not a function

D.) explain your answer from part c. Be specific.

Answer

x+y+z=10

1.25x+2.75x+3.15x+18.90

x=2z

Step-by-step explanation:

x=almonds

y=walnuts

z=cashews

9514 1404 393

Answer:

Step-by-step explanation:

We can let a, w, c represent pounds of almonds, walnuts, and cashews, respectively. Then the given relations are ...

  a +w +c = 10 . . . . . total pounds of nut mix

  a = 2w . . . . . . . . . twice as many almonds as walnuts

  1.25a +2.75w +3.15c = 18.90 . . . . total cost of the mix

__

Solving the system of equations can proceed by any of the methods you have learned for systems of two equations in two unknowns. Substitution, elimination, and matrix methods all work. Graphing methods are also available.

We can easily reduce this system to two equations in two unknowns by using the second equation to substitute for 'a'.

  2w +w +c = 10   ⇒   3w +c = 10

  1.25(2w) +2.75w +3.15c = 18.90   ⇒   5.25w +3.15c = 18.90

Solving the first of these equations for c, then substituting into the second of these equations gives ...

  c = 10 -3w

  5.25w +3.15(10 -3w) = 18.90

  -4.20w +31.50 = 18.90 . . . . simplify

  12.60 = 4.20w . . . . . . . . . . . add 4.20w -18.90

  3 = w . . . . . . . . . . . . . . . . . . . divide by 4.20

  c = 10 -3(3) = 1 . . . . . . . . . . . use the expression for c

  a = 2(3) = 6 . . . . . . . . . . . . . use the expression for a

The nut mix used 6 pounds of almonds, 3 pounds of walnuts, and 1 pound of cashews.

_____

Additional comment

The attached graph shows one way to obtain a graphical solution. The first and third equations were solved for c, and those expressions were set equal to obtain the graph for the red line. The blue line is the second equation. Here, we have used (x, y) for (a, w). The solution for these variables is (a, w) = (6, 3). Using the first expression for c gives c = 10 -(6+3) = 1. This is the same solution as above.

The place value of the decimal is the hundredth's place.

Answer:

The place value is the tenths.

Step-by-step explanation:

2.45: Tenths

2.045: Hundreths

2.0045: Thousandths

Answer:

its gonna be b

Step-by-step explanation:

Answer:

The answer to your question is 13.5%

Step-by-step explanation:

x ≤ -2

Step-by-step explanation:

[tex]\begin{aligned}\tt 5x-13x&\geq 16\\\tt (5-13)x&\geq\tt 16\\\tt -8x&\geq\tt 16\\\tt 8x&\leq\tt -16\\\tt x&\leq\tt\frac{-16}{8}\\\tt x&\leq\tt -2\end{aligned}[/tex]

Answer:

E=1/2mv2, v/10./17

Step-by-step explanation:

Answer:

I can't really see it so i don't know I'm sorry

Answer:

15

Step-by-step explanation:

Answer: 7 miles per hour

Step-by-step explanation:

3 1/2 miles = 7/2 miles

1/2 hours= 30 minutes

So,

In 30 mins, travelled 7/2 miles

In 1 min, travelled 7/2 ÷ 30= 7/2× 1/30 = (7×1)/(2×30) = 7/60 miles

In 60 mins, travelled (7×60)/60 miles = 420/60 miles = 7 miles.

Hence, the speed is 7 miles per hour.

Answer:

m = 2

Step-by-step explanation:

Rise:4 and run=2

4/2 = 2

Answer:

B.) –12x + 1.50

Step-by-step explanation:

Answer:

falseeeee

Step-by-step explanation:

im smart lol ight so so

3/1 · 2/3

3 times 2=6

6/3=2 not 3 my dude

Answer:warts  up man

Step-by-step explanation:

Answer:

five ninths plus four sixths is sixty six fifty four

Step-by-step explanation:

ano taong diyan po pic mo

Answer:

11

Step-by-step explanation:

3-(-8) = 3+8

= 11

Answer:

340

Step-by-step explanation:

last time I got this type of question, I either just multiplied it or sum, try doing different methods if u can because I got this question right and I forgot how I did it, but I feel like I multiplied something

Answer:

340

Step-by-step explanation:

which is the result of the surface area

Answer:

24.1 units

Step-by-step explanation:

Answer:

bc cot 0

Step-by-step explanation:

Answer:

[tex] let \:x \in (A\cap B)'\\\Rightarrow x \notin (A\cap B) \\\Rightarrow x \notin A \:or\: x\notin B\\ \Rightarrow x \in A' \:or \:x \in B'\\\Rightarrow x \in A' \cup B'\\\therefore (A ∩ B)' = A' ∪ B' [/tex]

It is proved that , A Intersection B complement is equal to the union of the complements of the sets A and B i.e., (A ∩ B)' = A' ∪ B'.

What is a set ?

Sets are represented as a collection of well-defined objects or elements.

It is given that A , B , C , X are sets with A , B and C are subsets of X.

Let's assume X be an element of A intersection B complement. or (A ∩ B)'.

i.e.,

X ∈ (A ∩ B)'

Also , we can say that :

X ∉ ( A ∩ B)

This implies :

X ∉ A or X ∉ B

or we can also say that :

X ∈ A' or X ∈ B'

or

X ∈ A' ∪ B'

So , we can conclude that :

(A ∩ B)' = A' ∪ B'

or A Intersection B complement is equal to the union of the complements of the sets A and B.

Therefore , it is proved that , A Intersection B complement is equal to the union of the complements of the sets A and B i.e., (A ∩ B)' = A' ∪ B'.

Learn more about sets here :

https://brainly.com/question/13193691

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Answer:

10 and 12

Step-by-step explanation:

10 and 12

if I divide 3 and 6 by 3 I get 1/2

if I divide 5 and 10 by 5 I get 1/2

1/2 is the first one listed

I cannot reduce 10/12 and get 1/2, I get 5/6

You answer is In 18 weeks he'll have the $400 for the new phone.

I know this because she needs 400 but already has 130 so (400-130=270)

This means that Ruby is missing 270 to get to the 400 that he needs for the phone.He gets $15 per week so now that's (270/15=18).Which means that in 18 weeks Ruby will complete to full $400 that he needs for a new phone.

The required solution of weeks will she have $400 saved to buy the new phone she wants is 18 weeks.

Arithmetic is the branch of mathematics that deals with the study of numbers using various operations on them. Basic operations of math are addition, subtraction, multiplication and division. These operations are denoted by the given symbols.

Given:

Ruby has $130 saved. She is saving $15 dollars more each week.

According to given question we have

let x represent the number of weeks

she saves $15 each week,

then in x weeks she will save = 15x dollars.

Add this to the 130 she has already saved, and at the end of each week we get

15x + 130dollars.

So,

15x + 130 = 400

Subtract 130 from both sides we get

15x-130+130=400-130

15x=270

Divide by 15 on both sides we get

x=18

Therefore, the required solution of weeks will she have $400 saved to buy the new phone she wants is 18 weeks.

Learn more details about arithmetic here:

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Answer:

The slope is undefined.

Step-by-step explanation:

If the x value stay the same between a set of points, the slope of the line will be undefined.

Answer:

Unit Cost = 0.6

Cost for 50 mile taxi ride = $30

Step-by-step explanation:

We are given the following information in the question:

Length of taxi ride = 28 miles

Time taken by taxi ride = 42 minutes

Cost of taxi ride = $16.80

We have to find cost of a 50 mile ride.

In order to do so, we have to find the unit cost of distance covered by ride which is the unit cost per mile of the ride that is the cost for 1 mile of taxi ride.

Our Formula:

Unit Cost = Cost for 1 mile of taxi ride = cost of taxi ride / distance covered by taxi ride

Using the values given we can use the formula so

unit cost = 16.80 / 28 = 0.6

Cost of 50 mile taxi ride

0.6 x 50 = 30

Henc costing $30 for a 50 mile taxi ride

9514 1404 393

Answer:

  3

Step-by-step explanation:

The square root function (√) only gives positive values, so graphs 1 and 4 make no sense.

When x = -3, the y-value is 0, consistent with graph 3.

Answer:

[tex]4*3=3*4[/tex]

Step-by-step explanation:

The commutative property of multiplication states that [tex]a*b=b*a[/tex].

In the first equation, we have that [tex]4*3=3*4[/tex], which is a clear application of the commutative property.

So, the answer is [tex]4*3=3*4[/tex] and we're done!

Answer:

it's the first one cause the commutative property is multiplying in any order without changing the product.... I think?

Answer:

0

Step-by-step explanation:

What does x represent on this equation?

I could tell you that 210+185+190=585

Answer:

$38 for 2 sweaters

Step-by-step explanation:

Every price for all other sweater options are divisible by 24, since it is the unit price (meaning 1 sweater = $24). 38 is not divisible by 24, but by 19. This means it does not follow the unit price. It would be a special sale.