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Margarita [4]
2 years ago
13

Use substitution to solve the system of equations. 28 = x – 7y –3x + 9 =4y

Mathematics
2 answers:
Serggg [28]2 years ago
5 0
The answer is (7,-3)
erica [24]2 years ago
4 0

Hello!

<h2>Answer:</h2>

\boxed{ \bf Solution:~(7,-3)}

<h2>Explanation:</h2>

I solved the problem in the image attached below. Go check it out! If you don’t understand a certain step, you may ask me in the comments.

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A region R in the xy-plane is given. Find equations for a transformation T that maps a rectangular region S in the uv-plane onto
muminat

Answer:

x = u\cos(v) , y = u \sin(v)

Step-by-step explanation:

For that transformation you just have to use polar coordinates, notice that when you use polar coordinates the radius is constant when the angles varies and the angle is constant when the radius varies. Therefore your transformation would be just

x = u\cos(v) , y = u \sin(v).

7 0
3 years ago
A circle has a radius of 3. An arc in this circle has a central angle of 20. What is the length of the arc?
Ede4ka [16]
Circumference of whole circle =
\pi \times 3 \times 2
360÷20=18
\frac{1}{18}  \times 6\pi = \frac{1}{3} \pi
hence length of arc = 1/3 pi
5 0
3 years ago
Read 2 more answers
Based on the measures
Sever21 [200]

A circle is a curve sketched out by a point moving in a plane. The measure of the ∠ACB or θ is 50°.

<h3>What is a circle?</h3>

A circle is a curve sketched out by a point moving in a plane so that its distance from a given point is constant; alternatively, it is the shape formed by all points in a plane that are at a set distance from a given point, the centre.

In order to solve the problem, we need to draw a line segment AB. Since A is the center of the circle AC and AC both will be the radius of the triangle ΔABC. Since two sides of the triangle are equal, the measure of ∠ABC and ∠ACB will be equal therefore, we can write,

∠ACB + ∠ABC + ∠BAC = 180°

2∠ACB + 80° = 180°

∠ACB = 50°

Hence, the measure of the ∠ACB or θ is 50°.

Learn more about Circle:

brainly.com/question/11833983

#SPJ1

4 0
1 year ago
2. For many computer tablets, the owner can set a 4-digit pass code to lock the device.
Zina [86]

Answer:

A.10

B.10

C. 10,000

D. 8 hours

Step-by-step explanation:

Firstly, we should know that the numbers are labeled 0-9.

A. 10 digits

B. We already took one digit , but we still have 10 choices left again as numbers can be repeated.

C. For the first number, we have 10C1 choices since we are selecting 1 out of 10 numbers. This is the case for all the 3 renaming numbers. Hence the total number of possible passwords are

(10C1)^4 = 10,000 possible password combinations

D. That is (10,000*3)/60 in minutes = 500 minutes = 500/60 = 8.3333 , approximately 8hrs

6 0
3 years ago
10 The cost to rent the cabin is $125 per night, plus a $50
kykrilka [37]

Answer:

C=125n+50

Step-by-step explanation:

each night you stay represents "n" so if you stayed 3 nights(n)

you would multiple 125x3= 375

plus the $50 non refundable charge

7 0
2 years ago
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