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3 years ago

Consider the system of equations below. What could be the first step in solving by elimination?

Mathematics

2 answers:

Mrrafil [7]3 years ago

6 0

<h2>Answer:</h2>

The first step would be to multiply the bottom equation by -1 to eliminate x, then you would combine like terms, like 5y + 2y, and 16 + 10.

MArishka [77]3 years ago

5 0

Answer:

Subtracting the 2 equations

Step-by-step explanation:

3x + 5y = 16

3x + 2y = 10

Subtract it;

3y = 6

Divide both sides b 3;

y = 2

Substitute y;

3x + 5y = 16

3x + 5(2) = 16

3x + 10 = 16

Subtract 10 from both sides;

3x = 6

Divide both sides by 3;

x = 2

(x, y) = (2, 2)

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Select all equations that have two solutions. a x^2=16 b 4x^2=0 c x^2=-16 d 3x+2=14 e x^2-1=24 f (x+8)(x-8)=0

never [62]

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a )

${x}^{2} = 16$

$x = ± \: 4$

Two solutions.

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b )

$4 {x}^{2} = 0$

$x = 0$

One solution .

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c )

${x}^{2} = - 16$

$No \: \: solution.$

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d )

$3x + 2 = 14$

$x = 4$

One solution.

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e )

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${x}^{2} = 25$

$x =± \: 5$

Two solutions.

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f )

$(x + 8)(x - 8) = 0$

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Two solutions .

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5 0

3 years ago

80,531 rounded to nearest thousand

Vlad [161]

Answer:

81,000

Step-by-step explanation:

go to whatever place it is asking you to round nearest to the if it is 5 or more you round up 4 or less it stays the same.

Saying for this -" 5 or more raise the score, 4 or less let it rest"

^round up^ ^stays the same^

4 0

3 years ago

Read 2 more answers

a motorist left home at 10 a.m. to travel to a cityof a distance of 260 km he reckoned hecould average 80km/ h at what time woul

kap26 [50]

Answer:

He would get there at 1:15 (I did this in my head, may be wrong)

Step by step solution:

We know the motorist left home at 10. We can divide the 260/80 and we get 3 hrs, we still have 20 km left over, keep on dividing and you get 1:15 p.m.

6 0

2 years ago

What is 6y−12=−3x in standard form?

aalyn [17]

3x + 6y = 12.
In standard form.

5 0

3 years ago

Find the slope of the line that passes through Point A $$(−5,7) and Point B $$(2,5), using the formula $$m=

tester [92]

Answer:

slope = - $\frac{2}{7}$

Step-by-step explanation:

Calculate the slope m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (- 5, 7 ) and (x₂, y₂ ) = (2, 5 )

m = $\frac{5-7}{2-(-5)}$ = $\frac{-2}{2+5}$ = - $\frac{2}{7}$

8 0

3 years ago