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3 years ago

Need help on 11, 12, and 13

Mathematics

1 answer:

Sati [7]3 years ago

7 0

11. is 25°
(Both triangles have two congruent angles which means the 3rd angle is bound to be the same. Just add the 90° and the 65° to get 155 and subtract from 180° because all triangles equal 180°)
12. is 25°
(Same as before, two of the angles are congruent so the third one is the same. Add all of the angles together and have them equal 180° because their is a variable present. 2x+60+70=180 or 2x+130=180. subtract 130 from both sides to get the equation 2x=50 and then divide both sides by 2 to get x=25.)
13. y=14 and x=11.6 (assuming m<d says 15x ÷ 2 because I couldn't really read it)
(m<a = m<d and m<b = m<e because they are lined up together in the ABC and DEF equation. so 3y=42 and (15x÷2=87)

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Pls I need help !!!!!!

Marianna [84]

Answer: m1 m2 and m5 all equal to 135 as well

While m3 m6 and m4 are 45

Why: since they are on a line the two angles together should equal 180. So 180- 135= 45

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What is the explicit formula

vova2212 [387]

Answer:

a(n) = 13 - 2n

Step-by-step explanation:

The explicit formula variables are a(n) = a(1) + d (n - 1). The a(1) is your number you started out with, and the d is the common difference. From the recursive formula example, you see that your first number is 11 and your difference is -2.

1. Plug the numbers into the equation : a(n) = 11 - 2 (n - 1)

2. Distribute: a(n) = 11 - 2n + 2

3. Add like terms: a(n) = 13 - 2n

If you want to double check, you can plug 1 into n and see if you get 11. I did this, and I did so it should be correct. Hope this made sense! Have a great day :)

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antiseptic1488 [7]

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Which property does this represent -3x1=-3

katrin2010 [14]

The property used is: Multiplicative identity

Step-by-step explanation:

We need to identify the property in the equation : $-3\times 1=-3$

The property used is: Multiplicative identity

Multiplicative identity

The multiplicative identity property is defined as if you multiply a number by 1, the result of multiplication is that original number.

In the given expression $-3\times 1=-3$ -3 is multiplied by 1 to get -3 so, multiplicative identity.

Keywords: Properties of Multiplication

Learn more about Properties of Multiplication at:

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