3 years ago

Can someone please help ?

Mathematics

1 answer:

den301095 [7]3 years ago

4 0

5x+4y=-2

3x+4y=10

Make one with negative coefficient to find first what is x then solve for y .

-1(5x+4y)= -1 (-2)

3x+4y=10

-5x-4y=2

+ 3x+4y=10

_________

-x = 12

Divide both sides by -2

-2x/-2=12/-2

X= -6

Now substitute your x into one of the equations to find y .

-5x-4y=2

-5(-6)+4y=2

30+4y=2

Subtract 30 both sides

-4y= 2-30

Divide both sides by -4

Y= -28/-4

Y= 7

Your answer is in point form (-6,7) meaning x is -6 and y is 7.

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4 0

3 years ago

If the numbers below were ordered from least to greatest, which number could you use to replace the blank? 0.20,2/5 □ , 3/4,8/10

faust18 [17]

1/2 would work for the blank space

because as shown in the image you could relate it to a whole for each one and put it to 100 to figure out what the blank could be

the 0.20 can be converted to 1/5 so that way you can put everything into the 100 group