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I am Lyosha [343]
4 years ago
10

Determine which relation is a function.

Mathematics
1 answer:
lys-0071 [83]4 years ago
5 0
You know if something is a function or not because the X will never be used twice in a set. If it is, then it's not a function.
A. Uses -1 twice
B. Uses Nothing twice (good)
C. Uses 0 twice
D. Uses 0 twice
B is your answer


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How do you learn ratios quick ?
atroni [7]
Ratios are like fractions example 5:6= 5/6
so if you know the basics of fractions you can also use it as ratios.
8 0
3 years ago
Compare the average score of a student at the beginning of a month and at the end of that month, if at first, it increased by 40
Leno4ka [110]

Answer:

122.5

Step-by-step explanation:

Let the student normal score be 100

In the beginning score increased by 40%

Hence score at the beginning =100+40 = 140%

Now before end score decreased by 25%

Decrease = 25% of 140 = 35

Hence score at the end of month = 140-35 = 105

Average score for the month

= Total of scores of end and beginning month /2

= \frac{140+105}{2} \\=122.5

4 0
3 years ago
Read 2 more answers
Rosa bought 1 pound of cashews and 2 pounds of peanuts for $10. At the same store, Sabrina bought 2 pounds of cashews and 1 poun
Valentin [98]

Answer:

The solutions are x=4, y=3. Cashews are $4 per pound and Peanuts are $3 per pound.

Step-by-step explanation:

let x = cashews

let y = peanuts

x + 2y = 10 - rosa's purchase

2x + y = 11 - sabrina's purchase

subtract 2x to isolate 'y'

y = 11 - 2x

x + 2(11 - 2x) = 10

x + 22 - 4x = 10 (Use the distributive property.)

-3x = -12

x = 4.00

Plug this into the original equations to find "y"

2(4) + y = 11

8 + y = 11

y = 3

4 + 2y = 10

2y = 6

y = 3

the solutions are: x = 4. y = 3.

5 0
3 years ago
james just bought a new car for 26,950 if it decreases in value by 15% annually how much will it be worth in five
puteri [66]
I believe the answer is 20212.5 if you meant how much will it be worth in 5 years.
I got this answer by multiplying 15% by 5 since annually means yearly.
15%(5)=75%
then turn 75% into a decimal by dividing 75 by 100
75/100=.75
Finally multiply 26950 by .75
26950 (.75)=20212.5

Hope this helps you.
4 0
4 years ago
I need help this is my hardest question
MaRussiya [10]

use soh cah toa!

Step-by-step explanation:

soh= sin opposite/hypotenuse

sin (65°) 5/x

* x *x

x* (sin 65°)= 5

x (0.906308) =5

÷0.906308 = ÷0.906308

x≈ 5.51689

x≈ 5.5

5 0
3 years ago
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