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sladkih [1.3K]
2 years ago
7

A bookstore charges $4 for all children's books. Elijah graphs the function that gives the total cost, y, in dollars to buy x nu

mber of books. Which ordered pair is a point on the graph of the function?
A) (2,8)
B) (4,12)
C) (9,18)
D) (20,5)
Mathematics
2 answers:
Molodets [167]2 years ago
4 0

Answer:

A is the right answer

Step-by-step explanation:

Citrus2011 [14]2 years ago
3 0
A is the right answer
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A math class is having a discussion on how to determine if the expressions 4x-x+5 and 8-3x-3 are equivalent using substitution.
docker41 [41]

Okay. In my opinion, all the class has to do is simplify the expressions and compare. But they want to substitute instead.

Well then.

First, let's notice that these are linear expressions, meaning that if they are equivalent then all their values match up.

Number 1 is not a good one. Just because they're both positive doesn't mean anything; they have to be <em>the same.</em>

This also eliminates 3.

Number 2 is a good one, but it's not as reliable. If, for instance, the two expressions are <em>not </em>equivalent and you get lucky enough to pick that one value they intersect at (or have in common), then you'd be wrong when you say they are equivalent.

Number 4 makes the most sense because if both expressions are equivalent, then every value matches up. If not, then only one will. So having two values to substitute will most definitely answer the class question.

Hope this helps, let me know if I messed up! ;)

5 0
3 years ago
Read 2 more answers
Greg feeds his dog 2/3 pounds of dog food for each meal. Greg has just bought 18 pounds of dog food. For how many meals will the
yan [13]
We can divide 18 pounds by 2/3 pounds to find how many servings of meals the dogs will have.
We will use the keep change flip rule to solve this.
18 / 2/3 is then the same as 18 x 3/2
We then multiply across to get
54/2
This would be 27 meals that the food will last
3 0
2 years ago
Which expression is equvialent to this expression 3/4 (4h -6 )
Gekata [30.6K]

Answer:

are there choices?

Step-by-step explanation:

4 0
2 years ago
Hepppppppppppppppppppppppppppppp
vfiekz [6]
You follow the rules for the quadratic formula, where

x= (-b +- √(b²-4ac) )/2a

Filling a, b and c in yields

x = (8 +- √(64-164) ) / 2 =>

x = (8 - √-100)/2 or x = (4 + √-100)/2

Well, √-100 = 10i, so then you simplify to the last answer, D:

x = 4-5i or x=4+5i
7 0
3 years ago
5) Alex's house (point F) lies on the same street as her school (point H). Alex's bus stop (point G) lies between her
vlada-n [284]

Answer:

100 meters

Step-by-step explanation:

Given the following :

Alex house = F

Alex school = H

Alex bus stop = G

FG = 2x meters

GH = 1000meters

FH = 1200 meters

Hence,

FH = FG + GH

1200 = (2x + 1000) meters

1200 = 2x + 1000

1200 - 1000 = 2x

200 = 2x

x = 100meters

Hence, x = 100 meters

7 0
2 years ago
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