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irinina [24]
3 years ago
10

1. Is –7 + 9 = –9 + 7 true, false, or open?

Mathematics
1 answer:
AleksAgata [21]3 years ago
4 0

1. is false

3. is 5

4. 17.5

someone else can get the other two.

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Find the slope of the line passing through the points (-4, 0) and (7, 0). please help!!:)
guapka [62]

The slope of the line passing through the points (-4 , 0) and (7 , 0) is 0 ⇒ 3rd answer

Step-by-step explanation:

The formula of the slope of a line is m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

where (x_{1},y_{1})  and  (x_{2},y_{2}) are two points on the line

To find the slope

  • Let one of the two points to be (x_{1},y_{1})
  • Let the other point (x_{2},y_{2})
  • Substitute them in the formula of the slope
  • Calculate the value of m

∵ The line passes through points (-4 , 0) and (7 , 0)

∴ x_{1} = -4 and x_{2} = 7

∴ y_{1} = 0 and y_{2} = 0

- Substitute these values in the formula above

∴ m=\frac{0-0}{7--4}=\frac{0}{11}

∴ m = 0

The slope of the line passing through the points (-4 , 0) and (7 , 0) is 0

Learn more:

You can learn more about the slope of a line in brainly.com/question/2654504

#LearnwithBrainly

4 0
3 years ago
WILL MARK BRAINLIEST!!!!!!!!!!!!!!! 20 POINTSSS
Phantasy [73]
Hi I know the answer it is 67
7 0
3 years ago
the circular pool has a diameters of 30 ft. and a dept. of 70 ft. How much water I need to fill the pool
Andrews [41]
Volume of the pool will be defined as V = πr²h
V = π(15)²(70)
V = 15750π ≈ 49480 cubic feet of water..  or about 370, 136.1296 gallons

1 cubic ft is equal to 7.48052 gallons

5 0
3 years ago
How do I solve this problem
VladimirAG [237]
Hi there!

Since, The length of th' tangents drawn from an external point to a circle are equal.

Therefore, we draw following conclusions :-

• CF = EC = 6 cm
• BE = DB = 16 cm
• AD = FA = 12 cm

Now,

According to th' question, Perimeter of ΔΑΒC :-

AB + BC + AC

⇒ AD + DB + BE + EC + CF + FA

⇒ 12 cm + 16 cm + 16 cm + 6 cm + 6 cm + 12 cm = 68 cm

Hence,
The Perimeter of ΔΑΒC is 68 cm

~ Hope it helps!
7 0
3 years ago
Please helpppppppppp
BigorU [14]

Answer:

The answer is -a^2 + 3a +1

Let me know if it's right, this is what I got when I did the problem :)  

6 0
3 years ago
Read 2 more answers
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