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Romashka-Z-Leto [24]
3 years ago
5

Solve using elimination x+y=-4 and x-y=2

Mathematics
1 answer:
slamgirl [31]3 years ago
7 0

Answer:

y= -3

Step-by-step explanation:

x+y=-4

-

x-y=2

_________

eliminate x so ur left with

2y= -6

divide

y= -3

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How would you write 2x^2-7=11 in both quadratic property and square root property?
dangina [55]

Answer:

Quadratic Property 2x^2-18=0

Square Root Property x=√9 or x=+3 or x=-3

Step-by-step explanation:

Quadratic Property or a quadratic Function is of the form ax^2+bx+c=0. So our task is to equate the given expression to zero. We can equate the expression to zero by subtracting 11 on both the sides. In doing so, we get 2x^2-18=0. This is the quadratic Property of the given Expression.

Square property is finding the value for x. we have make x equal to some value. Since we already have the quadratic Property as 2x^2-18=0, we can use this to find the value of x.

so, 2x^2=18

or x^2=18/2=9

or x=√9= +3 or -3.

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3 years ago
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vladimir1956 [14]

Answer:

You would multiply 38.3 time .40 which is the 40%

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Arisa [49]

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Step-by-step explanation:

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6 0
3 years ago
Wilton collected $8.50 in dimes and quarters while cleaning his father's truck. If the number of quarters is 3 times the number
dusya [7]

Answer:

Wilton found 10 dimes while cleaning his father's truck.

Step-by-step explanation:

Given that:

Total amount collected = $8.50 = 8.50*100 = 850 cents

Let,

x be the number of dimes

y be the number of quarters

According to given statement,

10x+25y=850     Eqn 1

y = 3x     Eqn 2

Putting y=3x in Eqn 1

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Dividing both sides by 85

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Wilton found 10 dimes while cleaning his father's truck.

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Step-by-step explanation:

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3 years ago
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