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aleksley [76]
3 years ago
12

A. 2(x + 1) - 7 = 5 x=?

Mathematics
1 answer:
vovikov84 [41]3 years ago
8 0

Answer:

x=5

Step-by-step explanation:

2x+2-7=5

2x-5=5

2x=10

x=5

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I need help working question 8. I don't understand how to start it
Lina20 [59]
Why don't you first try to use the cosine law to solve for an angle and then make use of the sin law to solve for the remaining angles.

Cosine law

C^2 = A^2 + B^2 - 2AB(cos C)
Solve for cos C, and then take the inverse of the trig ratio to solve for the angle.

Then set up a proportion like you have done using the sin law and solve for another angle. Knowing the sum of all angles in a triangle add up to 180 degrees, we can easily solve for the remaining angle.
8 0
3 years ago
1.
Bad White [126]

first polygon

ext. angle=180°-120°

=60°

ext \: ang =  \frac{360}{n}

n=360°/60°

n=6

second polygon

n=2(6)=12

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6 0
3 years ago
Upper bound and lower bound of 17
Licemer1 [7]

Answer:

Step-by-step explanation:

Hey there this si the upper and lower bound for 17

16.5<17<17.5

8 0
3 years ago
Visitors to a cinematic are either children, adults or pensioners. Ratio of children to adult visitors is 1:2 Ratio of adults to
VMariaS [17]

Ratio of children, adults and pensioners is 1 : 2 : 8/3 = 3 : 6 : 8.

Let, 3x is number of children.

So, 6x is number of adults and 8x is number of pensioners.

Now,

3x + 6x + 8x = 85

17x = 85

x = 5

Therefore, number of pensioners are 8×5 = 40.

Hence, this is the required solution.

7 0
3 years ago
Solve for y <br> 6x - 2y = 12<br> A. y= -3x + 6<br> B. y= 3x - 6<br> C. -3x + 6<br> D. -3x - 6
ololo11 [35]
The answer is y=3x-6. (B). First you subtract 6x from both sides. Then you get -2y=12-6x. Now, you divide both sides by -2. This gets you the final answer; y=3x-6 or y=-6+3x.
5 0
3 years ago
Read 2 more answers
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