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fiasKO [112]
3 years ago
7

Can I get some help on 56,60,70, and 78 please

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
7 0

What are you doing with these numbers

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What did you put for #3?
GaryK [48]

Answer:

huh

Step-by-step explanation:

4 0
2 years ago
Suppose someone tells you that she has a triangle with sides having lengths 2.6, 8.1, and 8.6. Is this a right triangle? Why or
Elodia [21]
First you check for Pythagoras'  Theorem.

Is  8.6² = 8.1²  + 2.6²  ? 
  
8.1²  + 2.6² = 65.61 + 6.76 = 72.37
8.6² =  73.96

8.1²  + 2.6²  ≠ 8.6² 

Since Pythagoras' Theorem is not satisfied it is not a right angled triangle.

The longest side is 8.6,  let's find the angle facing the longest side 8.6.

By cosine formula  CosA =  (b² + c² - a²) / (2bc)

CosA =  (2.6² + 8.1² - 8.6²) / (2*2.6*8.1) = -1.59/42.12 = -0.0377

A = Cos inverse (-0.0377) = 92.1 degrees

So there is  an angle is greater than 90 degrees.
8 0
3 years ago
(a^2-b)^3
Ganezh [65]
-1 is correct answer because
a= -2
b= 5 then
(-2^2-5)^3
(4-5)^3
(-1)^3
-1
7 0
3 years ago
Jonathan wants to make mashed potatoes for eight people. He found a recipe which feeds two people and requires five ounces of po
galben [10]

Answer:

2lb 32 oz.

Step-by-step explanation:

because 2=5 so 8=32  

32 divided by 2 =16 so 32 oz  2lb

4 0
2 years ago
Factorise using suitable identities (0.1x-0.2y)^2
Sav [38]

Answer:

Step-by-step explanation:

(a - b)² = a² - 2ab + b²

a = 0.1x

b = 0.2y

(0.1x - 0.2y)²= (0.1x)² - 2*0.1x*0.2y + (0.2y)²

                   = (0.1)²x² - 0.04xy + (0.2)²y²

                   = 0.01x² - 0.04xy + 0.04y²

3 0
3 years ago
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