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3 years ago

Which number is postitive, 45, -8, -45, -8

Mathematics

2 answers:

musickatia [10]3 years ago

6 0

Answer:

Step-by-step explanation:

if it has a subtraction or negative dash in front its negative.

Vanyuwa [196]3 years ago

6 0

Answer:

Step-by-step explanation:

Hello! Out of all of these options, 45 is the positive number. The other numbers are all examples of negative numbers. Hope this helps! :D

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Y = 3x + 15 3x + 3y = 9

Zina [86]

Answer:

$\Large\boxed{x=-3}$ $\Large\boxed{y=6}$

Step-by-step explanation:

Given the system of equations

$1)~y=3x+15$

$2)~3x+3y=9$

Divide 3 on both sides of the 2) equation

$3x+3y=9$

$3x\div3+3y\div3=9\div3$

$x+y=3$

Current system

$1)~y=3x+15$

$2)~x+y=3$

Substitute 1) equation into the 2) equation

$x+(3x+15)=3$

Combine like terms

$x+3x+15=3$

$4x+15=3$

Subtract 15 on both sides

$4x+15-15=3-15$

$4x=-12$

Divide 4 on both sides

$4x\div4=-12\div4$

$\Large\boxed{x=-3}$

Substitute the x value into one of the equations to find the y value

$y=3x+15$

$y=3(-3)+15$

$y=-9+15$

$\Large\boxed{y=6}$

Hope this helps!! :)

Please let me know if you have any questions

4 0

2 years ago

Rewrite the expression 3 times 4 times 5 times m times n using the fewest numbers of symbols and characters possible

NemiM [27]

Answer:

60mn

Step-by-step explanation:

3 * 4 * 5 * m * n

3 * 4 * 5 = 60

60mn

5 0

3 years ago

What is the polynomial 3y^2+(y+7)^2-15 after it has be simplified

kogti [31]

Answer:

4y^(2)+14y+31

Step-by-step explanation:

First you need to do (y+7)(y+7)

y^2+7y+7y+49

y^2+14y+49

Add it all together

y^2+14y+49+3y^2-15

4y^(2)+14y+31

4 0

3 years ago

Help help help help Answer please

Ludmilka [50]

Answer:

Mark talked on the phone for 120 minutes.

Step-by-step explanation:

18 - 12 = 6

6 ÷ .05 = 120

6 0

3 years ago

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Neporo4naja [7]

Answer:

Step-by-step explanation:

8 0

3 years ago