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Ymorist [56]
3 years ago
8

5x + 2y = -5 X + 3y = 1

Mathematics
1 answer:
balu736 [363]3 years ago
7 0

Answer:

(-17/13, 10/13)

Step-by-step explanation:

Next time, please include more info regarding what you're supposed to do.  I will assume that the instructions said "solve this system of linear equations using elimination by addition and subtraction."

Multiply all three terms of the second equation by -5.  Then the system looks like:

5x + 2y =     -5

-5X + -15y = -5

Next, combine these two equations:

5x + 2y =     -5

-5X + -15y = -5

----------------------

       -13y = -10

Dividing both sides by -13 yields y = 10/13.

Substituing 10/13 for y in the second equation, we get:

x + 3(10/13) = 1

Multiplying all three terms by 13 eliminates fractions:

13x + 30 = 13, or 13x  = -17.  Then x = -17/13, and the solution is

(-17/13, 10/13)

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Strike441 [17]

Answer:

24

Step-by-step explanation:

base (b) = 8

height (h) = 6

A = bh/2

= 8x6/2

= 48/2

= 24

Therefore the area is 24 square units

3 0
4 years ago
What is the equivalent fraction of y+2/5 y
mars1129 [50]

Q.what is the equivalent fraction of y+2/5 y

A.7y/5

Hope this helps:)

7 0
3 years ago
17. What is .25 written in its simplest fraction form? A. 100/25 B.215 C. 14 D.444​
BartSMP [9]

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3 years ago
Algebra 1 Grade 9.
Leya [2.2K]

Answer:

627.65 times

2.51^(10 - m) times

Yes, it makes sense

Step-by-step explanation:

Given that,

A magnitude 9 star is 2.51 times as bright as a magnitude 10 star

To find

<h3>a) </h3>

How many times as bright is a magnitude 3 star as a magnitude 10 star

10 - 3 = 7

2.51^7

627.65 times

<h3>b)</h3>

Expression to compare a magnitude m star to a magnitude 10 star

2.51^(10 - m) times

<h3>c)</h3>

Yes, it makes sense as a full moon is magnitude -13

so,

2.51^(10 - (-13))

2.51^(23)

1557742231 times

8 0
4 years ago
Hii can someone explain to me how to do this? tyvm
Snezhnost [94]

Step-by-step explanation:

it's late but I hope it helps :)

imagine that the > symbol is just an equal sign

so for example

x+2>4

will look like

x+2=4

and you solve normally

×=2

now we bring the symbol back

x>2

but if you multiple or divide by a negative the sign flips

so say you have

-2x>4

make it into

-2x=4

solve

x=-2

but instead of >

you put

x < -2

5 0
3 years ago
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