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gayaneshka [121]
3 years ago
14

Three times the sum of a number and 4 is twice a number minus 8.

Mathematics
1 answer:
amm18123 years ago
8 0

Answer:

Step-by-step explanation:

3(n+4)=2n-8

3n+12=2n-8

5n= -20

n= -4

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Prove that: 16sin20.sin40.sin60.sin80=3​
olga nikolaevna [1]

to prove that 6720. Sin 40. Sin 60. 80 equals 3 you'd have to divide 16 by 20 multiply subtract both sides by 3 which is 24x + 6x + 8x + -14 equals 40 40 + 20 equals 16 - -40 equals 80 which equals to 3

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3 years ago
What is the vertex form of the function y = x2 + 8x – 3
Scrat [10]

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Step-by-step explanation:

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If f(x)=-3 then x=___
Romashka-Z-Leto [24]

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3x

Step-by-step explanation:

6 0
3 years ago
Someone please help. i will mark as brainliest if right :)
DIA [1.3K]

Answer:

The other factor is 5x-2

Step-by-step explanation:

Using the factorisation method:

Two numbers that multiply to give -10 and add to give +3:

+5 and -2

5x^{2} +5x-2x-2

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(x+1)(5x-2)

So the other factor is 5x-2

I'm not sure about the second part of the question but I hope you understood how to deal with the first part.

5 0
2 years ago
3. In the figure below, find the values of x, y, and z.
Murrr4er [49]

Answer:

z= 13

x= 36

y= 18

Step-by-step explanation:

Solving for z.

We know that 108 degrees and (8z+4) are alternate exterior angles, so they are equal to each other.

We can set both of those angles equal to each other, and solve for our missing side, z.

108= 8z+4

104=8z

z= 13

Solving for x.

We know that 108 degrees and (3x) are alternate interior angles, so they would equal each other.

We can set both of these angles equal to each other, and solve for our missing side, x.

3x=108

x= 36

Solve for y.

We know that (4y) and (3x) are same side interior angles, so they would make 180 degrees. We know that (3x) would equal 108.

4y+108=180

4y= 72

y= 18

3 0
2 years ago
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