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Diano4ka-milaya [45]
3 years ago
8

How many solutions are there to the following system of equations?

Mathematics
2 answers:
pishuonlain [190]3 years ago
7 0
When we add the equations together, we need up with x=-7

substitute this and we get -28-8y=0 so y =-3.5

I think this is right.

we can also see the if we divide both of the answers by 3.5, x=-2 and y=-1. We can also remove the negatives of both and that will still work.

There's 3 right there for you. there may be more.
Nutka1998 [239]3 years ago
7 0
We can add the equations and cancel out the y terms
4x-8y=0
<u>-3x+8y=-7 +</u>
1x+0y=-7


x=-7
duh

sub back to find the x term
4x-8y=0
4(-7)-8y=0
-28-8y=0
add 8y both sides
-28=8y
divide by 8
-7/2=y

one solution, (-7,-7/2)
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Natali5045456 [20]

Answer:

a. zero point zero zero 5

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I really hope this helps you!!! Have a great day :).

7 0
1 year ago
Please help me!! pleaseee
morpeh [17]

Answer:

c. 2/3

Step-by-step explanation:


6 0
4 years ago
Read 2 more answers
Please help ASAP thank you!!!!
mart [117]

Answer:

41. f⁻¹(x) = -9x + 4

43. m⁻¹(x) = ∛(x-2)/4  

Step-by-step explanation:

41. y = (4-x)/9

swap x and y: x = (4-y)/9

solve y: 9x = 4-y

             y = -9x + 4

45. y = 4x³+2

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     y³ = (x-2)/4

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Let you do 42 and 46 by yourself

5 0
4 years ago
Which decimal is equivalent to 6×100+7×10+4×1/10+8×1/1,000​
Snezhnost [94]

The answer is 670.408, because 6x100=600, 7x10=70, 4x1/10 as a decimal is 0.4, 8x1/1,000 as a decimal is 0.008. Then, you add all of those 600+70+0.4+0.008=670.408.

8 0
3 years ago
You deposit $7,900 in a money-market account that pays an annual interest rate of 4.3%. The interest is compounded quarterly. Ho
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