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Masja [62]
3 years ago
5

What does the expression 0.30y represent ?

Mathematics
1 answer:
Vilka [71]3 years ago
5 0
The expression represents 0.30 times y, but I do not know the value of y.
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solve this system of linear equations. Separate the X- and Y- values with a comma. -9x+2y=-16 19x+3y=41​
Serjik [45]

Answer:

(2, 1)

Step-by-step explanation:

The best way to do this to avoid tedious fractions is to use the addition method (sometimes called the elimination method).  We will work to eliminate one of the variables.  Since the y values are smaller, let's work to get rid of those.  That means we have to have a positive and a negative of the same number so they cancel each other out.  We have a 2y and a 3y.  The LCM of those numbers is 6, so we will multiply the first equation by a 3 and the second one by a 2.  BUT they have to cancel out, so one of those multipliers will have to be negative.  I made the 2 negative.  Multiplying in the 3 and the -2:

3(-9x + 2y = -16)--> -27x + 6y = -48

-2(19x + 3y = 41)--> -38x - 6y = -82

Now you can see that the 6y and the -6y cancel each other out, leaving us to do the addition of what's left:

-65x = -130 so

x = 2

Now we will go back to either one of the original equations and sub in a 2 for x to solve for y:

19(2) + 3y = 41 so

38 + 3y = 41 and

3y = 3.  Therefore,

y = 1

The solution set then is (2, 1)

6 0
3 years ago
Read 2 more answers
A line passes through the points (-6, 4) and (-2, 2). Which is the equation of the line?
cupoosta [38]

Answer:

\displaystyle y=-\frac{1}{2}x+1

Step-by-step explanation:

The equation of any line in slope-intercept form is:

y=mx+b

Being m the slope and b the y-intercept.

Assume we know the line passes through points A(x1,y1) and B(x2,y2). The slope can be calculated with the equation:

\displaystyle m=\frac{y_2-y_1}{x_2-x_1}

Two points are given: (-6,4) and (-2,2). Calculating the slope:

\displaystyle m=\frac{2-4}{-2+6}=\frac{-2}{4}=-\frac{1}{2}

The equation of the line is, so far:

\displaystyle y=-\frac{1}{2}x+b

To calculate the value of b, we use any of the given points, for example (-6,4):

\displaystyle 4=-\frac{1}{2}(-6)+b

\displaystyle 4=3+b

Solving:

b = 1

The equation of the line is:

\boxed{\displaystyle y=-\frac{1}{2}x+1}

We can see none of the choices is correct.

8 0
3 years ago
What is the answer to 1 1/3 + (-5/6)
Ainat [17]
The answer is 0.5

Have an nice day!

3 0
3 years ago
How do I do this? 50 points, please answer
xz_007 [3.2K]

Check the picture below.

now, the midsegment of a triangle, besides being half the base, we have to bear in mind that is a "mid" segment, is a segment that lies half-way along the segments it touches.

so for the triangle above, well, the midsegment DE is cutting the segment BC it two equal halves, BE and EC, that means that \stackrel{x}{BE}~~ = ~~\stackrel{8}{EC}.

5 0
1 year ago
Three friends Kwabena , Esi, and Yaw were given 800 apples to share. Kwabena got 1 out of 4 of the apples. Esi and Yaw shared th
Art [367]

Answer:

i) Apples received by Esi = 360

ii) Apples received by Yaw = 240

Apples received by Kwabena = 200

Step-by-step explanation:

Total apples =  800

Apples received by Kwabena = (1/4) of 800

=\frac{1}{4}*800\\

Apples received by Kwabena= 200 apples

Remaining apples = 800 - 200 = 600 apples

Ratio of apples shared by Esi and Yaw = 3 : 2

Total share = 3 + 2 = 5

Esi's share = 3/5 of 800

=\frac{3}{5}*600\\=3*120

Esi's share = 360 apples

ii) Yaw's share = 600 - 360 = 240 apples

5 0
3 years ago
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