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ankoles [38]
3 years ago
5

Pls help me and explain

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
6 0

Answer:

4) BA, CA, CD

Explanation

A ray is a line that has one endpoint but goes on in the other direction

Answer

5) CA, CD

Explanation

A pair of opposite rays are two rays that extend in opposite directions and both their endpoints are C

Answer

6) BA, CD

Explanation

They are opposite rays using the definition above but with different endpoints.

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Construct an equation for the expression: 3 less than 2 times a number is 7. Show the solution to the equation and prove your so
ElenaW [278]

Answer:

5 x 2 -3 = 7

Step-by-step explanation:

i mean.... thats all

4 0
3 years ago
Yo im not good at this stuff, can someone help me?​
Kazeer [188]

Answer:

  21 kWh

Step-by-step explanation:

1. Subtract 25% from the original amount.

  25% of 28 kWh is ...

  0.25 × 28 kWh = 7.00 kWh

Subtracting this from 28 kWh, we find the usage after reduction to be ...

  28 kWh - 7 kWh = 21 kWh

__

2. We know that if we reduce 100% of a quantity by 25%, then the resulting amount is (100 -25)% = 75% of the original. As a fraction, this is 75/100 = 3/4 of the original amount. Then the reduced usage is ...

  (3/4) × (28 kWh) = 3·(7·4)/4 kWh = 3·7 kWh = 21 kWh

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Mario must reduce his usage to 21 kWh or less.

7 0
3 years ago
Which property does the following<br> equation represent?<br> 62? + 43 = 43+ 6x2
timurjin [86]

Answer:

commutative

Step-by-step explanation:

you are typing the same numbers but in different order

8 0
3 years ago
3. Suppose the mystery bag had resulted in the following number of red chips. Using the simulated sampling distributions found e
Vinvika [58]

Answer:

a) 0.172

b) 0.167

c) 0.1404

Step-by-step explanation:

Margin of error, E = 2\times\sqrt{\frac{p(1-p)}{n}}

here,

p = probability of the event

n = sample size

a) n = 30

p = 10 ÷ 30 = 0.333

Therefore,

E = 2\times\sqrt{\frac{0.333(1-0.333)}{30}}

= 2 × 0.0861

= 0.172

b)  n = 30

p = 21 ÷ 30 = 0.7

Therefore,

E = 2\times\sqrt{\frac{0.7(1-0.7)}{30}}

= 2 × 0.0836

= 0.167

c) n = 30

p = 22 ÷ 50 = 0.44

Therefore,

E = 2\times\sqrt{\frac{0.44(1-0.44)}{50}}

= 2 × 0.0702

= 0.1404

3 0
3 years ago
If you rewrite the problem 14(22) as 14(20+2) so that you can use mental math, which of the following properties will you use?
KiRa [710]
For this case, the property you can use is the following:
 Commutative property.
 We have then that:
 14 (20 + 2) = 280 + 28 = 308
 Equivalently:
 14 (2 + 20) = 28 + 280 = 308
 Either way the result is exactly the same.
 Answer: 
 Commutative property.
7 0
3 years ago
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