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Dominik [7]
3 years ago
10

Please help i need to redo​

Mathematics
2 answers:
Brut [27]3 years ago
7 0

Answer:

Step-by-step explanation:

4x+4+2x+2+7x-8=180

add like terms

4x+2x+7x=13x

4+2-8=-2

13x-2=180

+2 +2

13x=182

/13 /13

x=14

now you plug in X

4(14)+4= 60

2(14)+2= 30

7(14)-8= 90

add ur stuff up see if u get 180

60+30+90=180

Alexeev081 [22]3 years ago
5 0

#1:

A)

you need to know where a vertex goes on a isosceles triangle...

I attached a picture that explains it.....

you also want to label triangle.... XYZ

I put a picture on of how you should of labeled the triangle...

B)

so we need to find Measure for each angle.... REMEMBER: A triangle angles needs to = 180.

so your equations will need to be equal to 180.

4x+4+2x+2+7x-8=180

so we combine liked terms

4x+2x+7x=13x

4+2-8=-2

13x-2=180

+2 +2

13x=182

/13 /13

x=14

now you plug in X

4(14)+4= 60

2(14)+2= 30

7(14)-8= 90

now you want to check you answers so add them up to see if your answers equal 180...

60+30+90=180

to be continued.... i do second question on a second answer since i dont want pictures to get mixed up

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Write the third column of the matrix as a linear combination of the first two columns, if possible. (If not possible, enter IMPO
sladkih [1.3K]

Answer:

Elements in third column = - (elements in the first column) + 8(elements in the second column)

Step-by-step explanation:

A matrix is a rectangular array in which elements are arranged in a rows and columns.

Order of a matrix = Number of rows × Number of columns

Given matrix is \left[\begin{array}{ccc}1&2&15\\7&8&57\\6&5&34\end{array}\right]

Here,

15=-1+8(2)\\57=-7+8(8)\\\34=-6+8(5)

So,

Elements in third column = - (elements in the first column) + 8(elements in the second column)

7 0
3 years ago
SOME PLEASE ANSWER THIS AND SHOW HOW YOUR WORK THANK U!!!
Cloud [144]

Answer:

-6x^3y^-3

Step-by-step explanation:

6x-12x=-6x

5-2=3

y=y

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-6x^3y^-3

3 0
3 years ago
The height, h, in feet of the tip of the hour hand of a wall clock varies from 9 feet to 10 feet. Which of the following equatio
bixtya [17]

The correct option is (b) h=0.5cos(\pi/6t)+9.5.

The equations can be used to model the height as a function of time, t, in hours is h=0.5cos(\pi/6t)+9.5.

<h3>Equation of cosine function:</h3>

The following is a presentation of the cosine function's generic form;

y =  a + cos(bx - c) + d

amplitude = a

b = cycle speed

Calculation for the model height;

The height, h (feet) of the tip of the hour hand of a wall clock varies from 9 feet to 10 feet.

Obtain amplitude 'a' as

\begin{aligned}a &=\frac{\text { Maximum value }-\text { Minimum value }}{2} \\a &=\frac{10-9}{2} \\a &=\frac{1}{2} \\a &=0.5\end{aligned}

The time 'T' is calculated as-

\begin{aligned}&\mathrm{T}=\frac{2 \pi}{\mathrm{b}} \\&12=\frac{2 \pi}{\mathrm{b}} \\&\mathrm{b}=\frac{2 \pi}{12} \\&\mathrm{~b}=\frac{\pi}{6}\end{aligned}

Now, calculate 'd'

\begin{aligned}&\mathrm{d}=\frac{\text { Maximum value }+\text { Minimum value }}{2} \\&\mathrm{~d}=\frac{10+9}{2} \\&\mathrm{~d}=\frac{19}{2} \\&\mathrm{~d}=9.5\end{aligned}

Therefore, with the height as a function of time, t, expressed in hours, can be modeled by the following equations:

h=0.5cos(\pi/6t)+9.5

To know more about the general equation of a cosine function, here

brainly.com/question/27587720

#SPJ4

The complete question is-

The height, h, in feet of the tip of the hour hand of a wall clock varies from 9 feet to 10 feet. Which of the following equations can be used to model the height as a function of time, t, in hours? Assume that the time at t = 0 is 12:00 a.m.

A. h=0.5cos(\pi/12t)+9.5

B. h=0.5cos(\pi/6t)+9.5

C. h=cos(\pi/12t)+9

D. h=cos(\pi/6t)+9

7 0
2 years ago
A family is on a road trip, and they have
Setler [38]
500 KM because 150•100 (150 x 100/30 that's the total) 15,000/30=500 KM hope his helps
8 0
3 years ago
The width of a rectangle is five more than two times the length. The perimeter of the rectangle is 106 inches. What are the dime
schepotkina [342]
Say, width = x

length = 2x +5

(x+2x+5)*2= 6x+10

6x+10=106

x= 96/6=16

Width =16 Mt
Length =37 mt
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3 years ago
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