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Nostrana [21]
3 years ago
15

What is the answer? A. 41° B. 98° C. 123° D. 139°

Mathematics
1 answer:
Anna71 [15]3 years ago
3 0

Answer:

139

Step-by-step explanation:

Supplementary angles add to 180 degrees

BOC + 41 = 180

BOC = 180-41

BOC = 139

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Don't know how to do this
valentinak56 [21]
I'm afraid your equation is not correctly set up.  You need to identify the longest side of this right triangle; it is x.  This is the "hypotenuse."  Next, identify the lengths of the legs:  they are sqrt(13) and 2sqrt(2).

Here's a refresher on the Pythagorean Theorem:

(hypotenuse)^2 = (leg 1)^2 + (leg 2)^2

Applying this Theorem here,  [x]^2 = [2sqrt(2)]^2 + [sqrt(13)\^2

Solve this for x^2, and then take the positive root (only) of your result.
8 0
3 years ago
The frequency of vibration of a piano string varies directly as the square root of the tension on the string and inversely as th
artcher [175]

Answer:

  about 409.946 Hz

Step-by-step explanation:

The multiplier of frequency is (√(tension multiplier))/(length multiplier), so is ...

  (√1.25)/1.2 = (5/12)√5 ≈ 0.931695

So, the longer, tighter string will have the lower frequency of about ...

  0.931695×440 Hz ≈ 409.946 Hz

8 0
3 years ago
3y^2+y^- 5+ 4y+2y^3+8
kirill115 [55]

Answer:

9y+3

Step-by-step explanation:

you add all the common numbers and you end up with:

9y^6+3+y^-5

then you put the y^-5 under the other numbers and make it positive so it becomes:

9y^6+3/y^5, then you subtract the exponents of y: 6-5, so that cancels out the y on the bottom making it:

9y+3

4 0
3 years ago
A restaurant has a total of 30 tables which are of two
ki77a [65]

Answer:

Total number of tables of first type       = 23.

Total number of tables of second type = 7

Step-by-step explanation:

It is given that there are 30 tables in total and there are two types of tables.

Let's call the two seat tables, the first type as x and the second type as y.

∴                                             x + y = 30                        ......(1)

Also a total number of 81 people are seated. Therefore, 2x number of people would be seated on the the first type and 5y on the second type. Hence the equation becomes:

                                            2x + 5y = 81                        .....(2)

To solve (1) & (2) Multiply (1) by 2 and subtract, we get:

                                                      y = 7

Substituting y = 7 in (1), we get x = 23.

∴ The number of tables of first kind         = 23

  The number of tables of second kind   = 7

4 0
4 years ago
2(3a + 6) = 4(a - 2)
Leviafan [203]

Answer:

a = -10

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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