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stich3 [128]
2 years ago
14

Pythagorean theorem help plz i really need help plz i dont really get it cuz i forgot

Mathematics
2 answers:
muminat2 years ago
7 0
7.62 a^2+b^2=c^2 have a great day
solmaris [256]2 years ago
7 0

Answer:

7.62 the answer is already rounded.

Step-by-step explanation:

C= the square root of A² + B²

c= square root of 7²+3²= 7.615773106=7.62

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The art club spent $45 on supplies for Valentines to sell during lunches. they made 60 valentines. what's selling price for a va
lina2011 [118]
Divide 45 by 60 which gives you 0.75. To check your answer, multiply 0.75 by 60 then add that answer to -45. So, the answer is 0.75
3 0
3 years ago
Give an example of a function f : N → N that is surjective but not injective. You must explain why your example is surjective an
Helen [10]

Answer:

Consider f: N → N defined by f(0)=0 and f(n)=n-1 for all n>0.

Step-by-step explanation:

First we will prove that f is surjective. Let y∈N be any natural number. Define x as the number x=y+1. Then x∈N, and f(x)=x-1=(y+1)-1=y.  We conclude that f is surjective.

However, f is not injective. Take x1=0 and x2=1. Then x1≠x2 but f(x1)=0 and f(x2)=x2-1=1-1=0. We have shown that there are two natural numbers x1,x2 such that x1≠x2 but f(x1)=f(x2), that is, f is not injective.

Note:

If 0∉N in your definition of natural numbers, the same reasoning works with the function f: N → N defined by f(1)=1 and f(n)=n-1 for all n>1. The only difference is that you consider x1=1, x2=2 for the injectivity.

7 0
2 years ago
The number line shows the graph of inequality.​
Sophie [7]

Answer:

The first one is correct.

Step-by-step explanation:

-3.5 is inside of the shaded area of the line.

I hope this helps.

4 0
2 years ago
Read 2 more answers
13. Use the distributive property
Brrunno [24]

Answer:

4x-14 jrjejejeueuueuw

5 0
2 years ago
Read 2 more answers
10, 30, 90 continue the pattern
Novosadov [1.4K]
The answer is 270, the pattern is multiplying by 3. So, 10 • 3 = 30 30 • 3 = 90 90 • 3 = 270, and so on. Hope this helps! Let me know if you need any further assistant.
7 0
2 years ago
Read 2 more answers
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