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Yuri [45]
2 years ago
13

Consider the system of equations. 20 POINTS NEED HELP ASAP

Mathematics
1 answer:
Alex2 years ago
3 0

- 5x - 1 = 2x + 6

- 7x = 7

7x = -7

x = -1

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The lengths of the sides of a triangle are in the extended ratio 44 ​: 55 ​: 77. the perimeter of the triangle is 6464 cm. what
joja [24]
44x + 55x + 77x = 6,464 centimeters.
x = <span> <span> <span> 36.7272727273 </span>

Therefore the sides are
44*</span></span><span><span>36.7272727273 = 1,616 </span>
55*</span><span>36.7272727273  </span>= 2,020
77* <span> <span> <span> 36.7272727273 </span> </span> </span> = 2,828

OR maybe that's another of those infamous Brainly typos.

4x + 5x + 7x = 64 centimeters.
x = 8

Therefore the sides are
4*8 = 32
5*8 = 40 and
7*8 = 56 centimeters



6 0
3 years ago
Need help will mark brainliest...
Xelga [282]

Answer:

Step-by-step explanation:

Step-by-step explanation:

The given data set is:

Week 1: 600

Week 2: 300

Week 3: 500

Week 4: 900

The following are the steps to find the standard deviation:

Step 1. Jim enters the data and calculates the average or mean.

Step 2. Jim calculates the deviation from the mean by subtracting the mean from each value.

Data value (x)                                                              

600                                                                           25

300                                                                         -275

500                                                                         -75

900                                                                          325

Step 3. Jim squares each deviation to remove negative signs.

Data value (x)                                                            

600                                                                       625

300                                                                    75625

500                                                                      5625

900                                                                   105625

Step 4. Jim sums the squares of each deviation and divides by the count for the variance.

Step 5.Jim takes the square root of the variance to find the standard deviation.

4 0
3 years ago
8 is seven more than the cube of a number
melamori03 [73]

8 is 7 more than the cube of '<em><u>1</u></em>' .

Hope it helps...

Regards;

Leukonov.

8 0
3 years ago
Read 2 more answers
1) A golf store pays its wholesaler $40 for a certain club, and then sells it to
Kruka [31]
The markup rate is 87.5%
8 0
3 years ago
HELP! Evaluate tan 45ddegrees /sin 30 degrees. In your final answer include all calculations
nadezda [96]
<h2>Hello!</h2>

The answer is: 2

<h2>Why?</h2>

Before solving the problem, we must remember the following:

tan(\alpha)=\frac{sin(\alpha)}{cos(\alpha)}

So, for tan(45°) we have:

tan(45)=\frac{sin(45)}{cos(45)}\\ \\\frac{sin(45)}{cos(45)}=\frac{\frac{\sqrt{2} }{2} }{\frac{\sqrt{2} }{2} }=1

Also, for sin(30°), we have:

sin(30)=\frac{1}{2}

Then, substituting and dividing, we have:

\frac{tan(45)}{sin(30)}=\frac{1}{\frac{1}{2}}\\\\\frac{1}{\frac{1}{2}}=1*\frac{2}{1}=2

So, the answer is 2.

Have a nice day!

6 0
4 years ago
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