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MAVERICK [17]
3 years ago
9

solve the following system of equations express your answers as an ordered pair in the format (a,b) with no spaces between the n

umber of symbols 3x+4y=16 -4x-3y=-19
Mathematics
2 answers:
UNO [17]3 years ago
8 0

Answer:

(4,1)

Step-by-step explanation:

The system of equations is

3x+4y=16......(1)\\-4x-3y=-19.....(2)

Multiply equation(1) by 4 and equation (2) by 3 and then add

12x-12x+16y-9y=64-57\\7y=7\\y=1

Plugging the value of y in equation (1)

3x+4(1)=16\\3x+4=16\\3x=12\\x=4

Hence, the solution to the given system of equation is (4,1)

Vlada [557]3 years ago
3 0
The answer to your question is (4,1)
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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

ext. ang= 360°/n = 360°/12° = 30°

int. ang = 180°-30°= 150°

answer is C

6 0
3 years ago
What is (5,1) reflected on the y axis
asambeis [7]

Answer:

(-5 , 1)

Step-by-step explanation:

If you are reflecting over the x-axis, you are changing the sign of the y.

If you are reflecting over the y-axis, you are changing the sign of the x.

In this case, you have the point (5 , 1). You are reflecting over the y-axis, which means that you are flipping the sign of the x value.

(5 , 1) reflected over the y-axis is (-5 , 1)

(-5 , 1)

~

3 0
2 years ago
Read 2 more answers
A slice of pizza costs $1.57. How much will 27 slices cost?
elena-s [515]

It will be cost $ 42.39 for 27 slices of pizza

<h3>Further Explanation</h3>

A slice of pizza = $1.57

27 slices of pizza = the number of pizza x price/slice

                              = 27 x 1.57

We are going to use standard algorithm to solve this multiplication

  1.57        ⇒ 2 decimal places

<u>     27</u>    x   ⇒ 0 decimal place

 1099

<u> 314   </u>+

42.39        ⇒ 2 decimal places

In decimal number multiplication, the process is the same with the whole number multiplication. Only always remember when to put the decimal point in the answer.

<h3>Learn more</h3>

Total spend brainly.com/question/12203917

Decimal multiplication brainly.com/question/2308946

Decimal multiplication brainly.com/question/1254534

Keywords: multiplication, decimal multiplication, two digits number additional, additional, area, measurement

3 0
3 years ago
Read 2 more answers
I need help i got confused after 3 of these
Nikolay [14]
-1, -1 I think is the answer
7 0
3 years ago
In an older television set, the screen height is 0.75 times the screen width.
natima [27]
The television set has a rectangular shape. The diagonal of this rectangle along with its width and length together form a right angular triangle.
This means that we can apply the Pythagorean theorem which states that:
(diagonal)^2 = (length)^2 + (width)^2

Let the width be w. We know that the length is 0.75 times the width, this means that: length = 0.75 w

Substitute in the above equation:
(20)^2 = (0.75w)^2 + (w)^2
400 = 0.5625 w^2 + w^2
400 = 1.5625 w^2
w^2 = 256
w = 16

This means that the width of the screen is 16 in. 
5 0
3 years ago
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