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Marina CMI [18]
3 years ago
11

HELP!

Mathematics
1 answer:
Leona [35]3 years ago
3 0
1. The scale factor is the ratio of the length of a side of one figure to the length of the corresponding side of the other figure.
2. You’ll have to be more specific with what you’re working with. Is it just a line with chosen points, inequalities, or something else?
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Elvira and Aletheia live 3.1 miles apart on the same street. They are in a study group that meets at a coffee shop between their
Sophie [7]

Answer:

  • Elvira's speed: 3.0 mph
  • Aletheia's speed: 2.4 mph

Step-by-step explanation:

Let "e" and "a" represent the speeds of Elvira and Aletheia, respectively. Then the total distance they cover is ...

  distance = speed × time

  (1/2)e + (2/3)a = 3.1

And the relationship between their speeds is ...

  e - a = 0.6

__

To solve this system, we can double the first equation and subtract the second to get ...

  2(1/2e +2/3a) -(e -a) = 2(3.1) -(0.6)

 7/3a = 5.6 . . . . . . . . . . simplify

  a = (3/7)(5.6) = 2.4 . . . multiply by 3/7

  e = a +0.6 = 3.0 . . . . . Elvira's speed is 0.6 mph more than Aletheia's

Elvira's walking speed is 3.0 miles per hour; Aletheia's is 2.4 miles per hour.

7 0
3 years ago
2. The length of XZ is 28 units. If XY = 2x + 2 and YZ = 9x – 7, what are the lengths of XY and
Novosadov [1.4K]

Answer:

XY = 8 and YZ = 20

Step-by-step explanation:

If XY and YZ are on the one line, we can write

XY + YZ = 28

(2x+2) + (9x - 7) = 28

2x+2 + 9x - 7 = 28

11x - 5 = 28

11x = 33

x = 3

XY = 2x+2 = 2*3 + 2 = 8

YZ = 9x - 7 = 9*3 - 7 = 27 - 7 = 20

8 0
2 years ago
WILL MARK BRAINLIEST!!!!20 POINTS!!!!URGENT!!!
zvonat [6]

Answer:

the firsts third and last one

Step-by-step explanation:

hope this helped

8 0
3 years ago
Kyle wants to make $10,000 in gift cards. Each gift card is worth $100 and costs 1,200,000 in points. How many points does Kyle
OleMash [197]
Kyle needs 100 $100 gift cards to reach $10,000 in gift cards (100x100=10,000). Each gift card is 1,200,000 points so 100x1,200,000=120,000,000. Kyle needs 120,000,000 points to make $10,000 worth of gift cards.
6 0
3 years ago
PLEASE HELP <br><br> Which relation is a function?!
tia_tia [17]

The answer is the third one aka C.

There must not be two points on the same y-axis because that doesn't make a function but a relation instead.

C. doesn't have 2 points on same y-axis and therefore the third picture is the relation that's a function.

4 0
3 years ago
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