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svlad2 [7]
3 years ago
11

-5x-y=12 3x-5y=4 Linear systems by substitution

Mathematics
1 answer:
alukav5142 [94]3 years ago
4 0
You would do 3 times 5 mines 5 which equals 10 and the you would do 5x12 

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Julio says, "If you subtract 19 from my number and multiply the difference by - 7, the result is - 28." What is Julio's number?
ra1l [238]

Answer:

23

Step-by-step explanation:

Basically I did it backwards & opposites:

-28 divided by -7 = 4

4 + 19 = 23

I checked btw and it worked.

4 0
3 years ago
3(2x+6)<br> Distributive Property
Ksivusya [100]

Answer:

6x+18

Step-by-step explanation:

Multiply 3 to all the numbers on the parenthesis

Hope this helps!

7 0
3 years ago
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Write an equation that is perpendicular to and 3x+y=3 whose y-intercept 5. Anyone please help me, no link just explain how to do
Liula [17]

Answer:

y = \frac{1}{3}x + 5

Step-by-step explanation:

By definition, two lines are perpendicular if and only if their slopes are negative reciprocals of each other:  m = - \frac{1}{m_{2} }, or equivalently, m_{1} * m_{2} = -1.

Given our linear equation  3x + y = 3  (or y = -3x + 3):

We can find the equation of the line (with a y-intercept of 5) that is perpendicular to y = -3x + 3 by determining the negative reciprocal of its slope, -3, which is \frac{1}{3}.

To test whether this is correct, we can take first slope,  m_{1} = -3,  and multiply it with the negative reciprocal slope m_{2} = \frac{1}{3} :

m_{1} * m_{2} = -1

-3 * \frac{1}{3}  = -1

Therefore, we came up with the correct slope for the other line, which is  \frac{1}{3}.

Finally, the y-intercept is given by (0, 5). Therefore, the equation of the line that is perpendicular to 3x + y = 3 is:

y = \frac{1}{3}x + 5

7 0
3 years ago
If muffins cost 5.24 how much would 5 muffins cost
natta225 [31]
5.24 x 5 = $26.2
5 Muffins would cost $26.2
3 0
3 years ago
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Please help it’s for 50 points
amid [387]

Step-by-step explanation:

3√8 is irrational number, and

2√18 is also irrational number

3√8 + 2√18 =

3×2√2 + 2×3√2 =

6√2 + 6√2 = 12√2

so, 12√2 is irrational number.

the correct answer is

A. the sum of two irrational numbers is irrational.

4 0
3 years ago
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