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makvit [3.9K]
3 years ago
9

I keep messing this up for #13 I got (1/19, 35/38) and for #15 I got (2,-1) both of which I know are wrong, someone help me unde

rstand what I did wrong?

Mathematics
1 answer:
valentinak56 [21]3 years ago
3 0
2x  + y = x/2 + 1  multiply  this by -4:-
-8x - 4y = -2x - 4
4y         = 2x       Adding:-

-8x = -4
x = 1/2

Substitute in 4y = 2x:-

4y = 2*1/2

y = 1/4 

Answer ( 1/2, 1/4)
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AlekseyPX
A. -3x+5+7-4x 
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-7x+12-5x+17 
-7x-5x+12+17
-12x+29

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8 0
2 years ago
1. The perimeter of the square is f(x) = 4x, where x is the side of the square. Find the domain of the function.
Mkey [24]

If the perimeter of the square is 4x then the domain of the function will be set of rational numbers and the domain of the function y=3x+8(3-x) is set of real numbers.

Given The perimeter of the square is f(x)=4x and the function is y=3x+8(3-x)

We will first solve the first part in which we have been given that the perimeter of the square is 4x and we have to find the domain of the function.

First option is set of rational numbers which is right for the function.

Second option is set of whole numbers which is not right as whole number involves 0 also and the side of the square is not equal to 0.

Third option is set of integers which is not right as integers involve negative number also and side of square cannot be negative.

Hence the domain is set of rational numbers.

Now we will solve the second part of the question

f(x)=3x+8(3-x)

we have not told about the range of the function so we can put any value  in the function and most appropriate option will be set of real numbers as real number involve positive , negative and decimal values also.

Learn more about perimeter here brainly.com/question/19819849

#SPJ10

6 0
1 year ago
Read 2 more answers
Find the missing angle in the triangle below
antoniya [11.8K]

Answer:

120

Step-by-step explanation:

Exterior angle theorem

50 + 70 = 120

8 0
2 years ago
Read 2 more answers
X+2y=2 I don't get how to get y by itself
Ksivusya [100]
You have to divide so it would be

X+2/2 = y do you see what I did so then it would be
X+y = xy =2=2xy so you have to first divide then combine like terms
6 0
2 years ago
Four more than a number is no more than thirteen
statuscvo [17]
The equation would be 4+x\leq 13. 
Subtract 4 from both sides. The four on the left would cancel out and the 13 on the right would now be a 9. Therefore, the answer is x \leq 9
4 0
3 years ago
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