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vichka [17]
3 years ago
5

Can you use addition or subtraction to solve any system

Mathematics
2 answers:
pshichka [43]3 years ago
7 0
Yes you can. Addition is able to substitute multiplication, just like subtraction is able to substitute division.
Sauron [17]3 years ago
4 0
Yes. <span>You can solve a system of equations through addition, subtraction, multiplication, or substitution.</span>
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Erin invests $7000 in stocks and bonds. The bonds earn 5% annual interest and the stocks earn 8% interest. If she earns $404 in
Marina CMI [18]

Answer:

\large \boxed{\$5200}

Step-by-step explanation:

               Let b = the amount invested in bonds

Then 7000 -b  = the amount invested in stocks

              0.05b = interest from bonds

0.08(7000 - b) = interest from stocks

\begin{array}{rcll}0.05b +0.08(7000 - b) & = & 404 &\\0.05b + 560 - 0.08b&=&404&\text{Distributed the 0.08}\\-0.03b + 560 & = & 404 & \text{Simplified}\\-0.03b & = & -156 & \text{Subtracted 560 from each side}\\\\b & = & \dfrac{-156}{-0.03} & \text{Divided each side by -0.03}\\\\b & = &\mathbf{5200}\\\\\end{array}\\\text{Erin invests $\large \boxed{\mathbf{\$5200}}$ in bonds}

5 0
3 years ago
Write an equation of the line passing through (-6, 1) that is perpendicular to the line 2x -5y = 2
Bess [88]

Answer:

y= -5/2 x + 14 (point slope form)

2y+5x=28 (standard form)

Step-by-step explanation:

Perpendicular lines met the following condition

m1*m2=-1 (the product of their slopes is -1)

To obtain m2, the slope of our desired line lets first re arrange the equation of the first line. 2x-5y=2, so. 2x-2=5y.

Isolating y, leads the following, result: y= 2/5 x - 2/5

m1=2/5

m2 is =-5/2

The equation of our desired line is the following

y=mx+b, we have m, which is -5/2, but still need to find value for b.

Lets now evaluate the above equation in the given point (-6,1).

1=-6 * -5/2 + b.

b=14.

Now we can say the equation that our desired line is

y= -5/2 x + 14 (point slope form)

Or... If we group variables 'x' and 'y' together

y+5/2 x = 14, we want integer coefficients, so lets multiply this expression by 2, to obtain the following:

2y+5x=28

4 0
3 years ago
Alissa cut a piece of string that was 17feet long. Darnell cut a piece of string that was 5 yards long. Alissa wanted to cut her
Anna71 [15]
The answer is 12 feet I got this because 17-5=12
8 0
3 years ago
PLEASE HELP WILL MARK BRAINLIEST THANK YOU
Juliette [100K]

Answer:

Hope this helps u pls mark me brainlist

formula : l x B = 10 x 16 = 160 sq

6 0
3 years ago
Use the table for 19-23. write each ratio in the form a/b and then as a decimal. Tell whether each decimal is a terminating or r
stellarik [79]
All you are basically doing is making ratios.
Basketball to football would be 5 to 11 or 5:11 or 5/11.
What you do is in the order you said it (basketball to football) you find that info and make it a ratio. A ratio must be simplified and can be written 3 ways, as shown above.

Hockey to lacrosse would be 6 to 10 and simplified would be 3 to 5.

Try doing 3 and 4 and 5 on your own to help you understand it more:) if you have any questions tell me.
4 0
3 years ago
Read 2 more answers
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