4 years ago

Are positive integers closed under subtraction?

Mathematics

2 answers:

Galina-37 [17]4 years ago

8 0

Do you remember the answer..? I need help as well.

Flura [38]4 years ago

6 0

#1 not closed
#2 closed
#3 not closed
#4 not closed

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F(-1) f(x) = -3x2 + 2x - 7

egoroff_w [7]

Answer:

$f(-1) = -12$

Step-by-step explanation:

<u>Step 1: Set x to -1 and solve</u>

<u /> $f(x) = -3x^2+2x-7$

$f(-1) = -3(-1)^2+2(-1) - 7$

$f(-1) = -3(1) - 2 - 7$

$f(-1) = -3 - 2 - 7$

$f(-1) = -12$

Answer: $f(-1) = -12$

3 0

3 years ago

A little bit of geometry how many triangles do you see

Neko [114]

I would have to say That i see 8

6 0

3 years ago

Read 2 more answers

I'll give you more points but you have to answer all the parts to the question. I need this plsssss ty lol. Show all work too pl

alexira [117]

Answer:

a) 34mi

b) 10mi

c) 44mi

d) by Calculating the amount of miles it would take John to go to school plus the amount of miles it would take Sara to go to school. Then add the sum of the amount of miles it took for both to go to school.

Step-by-step explanation:

a) explanation:

$a^{2} +b^2=c^2$

$16^2+30^2=c^2$

$256 + 900 = c^2$

$c^2=1156$

$\sqrt{1156}=34mi$

b) explanation:

$a^{2} +b^2=c^2$

$6^2+8^2=c^2$

$36+64=c^2$

$c^2=100$

$\sqrt{100} =10mi$

c) explanation: we already have all the data from John's house to Sara's House.

John's House to Sara's House = John's House to School + Sara's House to School.

Sara's House to School (Question #1) = 34mi

John's House to School (Question #2) = 10mi

34(mi) + 10(mi) = 44(mi)

d) explanation: explanation is on the answer

7 0

3 years ago

Directions: Find each square root. Round to the nearest tenth if necessary. help?

Archy [21]

The square root of 289 is 17
The square root of 360 is 18.97... which would be rounded to 18
The square root of -90 is 9

8 0

3 years ago

Read 2 more answers

A street in San Francisco rises 20 feet for every 100 feet horizontally. What is the measure of the angle of elevation,

SIZIF [17.4K]

Answer:

11°

Step-by-step explanation:

tan ∅ = 20/100 = 0.2

∅ = 11.31°

5 0

3 years ago