3 years ago

Are these answers correct

Mathematics

1 answer:

Reika [66]3 years ago

3 0

Answer:

yes

Step-by-step explanation:

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Is 4.5 same as 4.50?

Softa [21]

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Yes

Step-by-step explanation:

0s after all the decimals do not count

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Question 1 Determine the midpoint of the segment with endpoint (-9,3) and (7,-8). Question 2

mario62 [17]

Answer:

(-1, -2.5)

Step-by-step explanation:

the midpoint of a segment is $(\frac{x1+x2}{2} ,\frac{y1+y2}{2}$ $)$ , given points (x1, y1) and (x2, y2)

$midpoint=(\frac{-9+7}{2}, \frac{3-8}{2} )$ $= (\frac{-2}{2}, \frac{-5}{2} ) = (-1, -2.5)$

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PERR AMD A PEERN2 SJE

Alla [95]

Answer:

3 peers

Step-by-step explanation:

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two girls have 76$ between them. if they first gave the second $7 they would each have the same amount of money. how much did ea

Rainbow [258]

Each girl had a total of $10.85

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3 years ago

3x+2y=23 1/2x-4=y What should I do for this one...? I dont really understand

Hitman42 [59]

Since you have y alone on one side of the equation......

Use substitution and plug in 1/2x-4 for y in the other equation.

$3x+2(1/2x-4)=23\\$

Distribute

$3x+x-8=23$

Combine like terms

$4x-8=23$

Add 8 to both sides

$4x=31$

Divide by 4

and $x=31/4$

Plug this value in for x

$31/4*1/2-4=y$

Simplify

$31/8-4=y$

Multiply everything by 8 and simplify

$31-32=8y\\-1=8y$

Divide.....

$y=-1/8$

Your answers are:

$y=-1/8\\x=31/4$

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2 years ago