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3 years ago

-2(6) + 3(5 - 4 . 2) =

Mathematics

2 answers:

Veseljchak [2.6K]3 years ago

7 0

Answer:

-9.6

Step-by-step explanation:

-2 x 6+3(5-4.2)

-2 x 6=-12

-12+2.4

-9.6

Vadim26 [7]3 years ago

5 0

Answer:−9.6

Step-by-step explanation:

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12) Given that p is an integer, q = -12 and the quotient of р 9 is -3, find p. A) -36 B) -4 C) 4 D) 36

dolphi86 [110]

D) 36

So q is equal to -12 and P divided by Q will be equal to -3
but since you know Q you replace it with -12 and now it's gonna be P divided by -12 equal to -3
move -12 to the other side by multiplying -12 to both sides so you cancel out the -12 under P and you get to isolate P
-3 times -12 will be +36 because the two negative signs cancel out

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2 years ago

1. Slove the system of equations, first by graphing, and then algebraically. (8 points) y=x-2 and y=-2x+7

Anton [14]

The solution of the equation is $x=3$ and $y=1$

Explanation:

The equations are $y=x-2$ and $y=-2 x+7$

First we shall solve the equation graphically.

The image of the graph is attached below.

This contains the solution to the system of equations.

The equations $y=x-2$ and $y=-2 x+7$ are plotted on the graph.

The intersection of these two equations are the solutions of the system of equations.

Thus, the intersection of the two equations are $x=3$ and $y=1$

Now, we shall solve the equation algebraically.

Let us solve the equation using substitution method.

Let us substitute $y=x-2$ in $y=-2 x+7$ , we get,

$x-2=-2x+7$

Adding both sides by 2x, we have,

$3x-2=7$

Adding both sides by 2, we get,

$3x=9$

Dividing both sides by 3,

$x=3$

Thus, the value of x is 3.

Substituting $x=3$ in $y=x-2$ , we get,

$y=3-2\\y=1$

Thus, the value of y is 1.

Hence, The solution of the equation is $x=3$ and $y=1$

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3 years ago

what is 2/a = a/50. These are factions if you already didn't know. I need to know what the answer is. it is a proportion.

Natalija [7]

2/a= a/50

Cross multiply:
a* a= 2*50
⇒ a^2= 100
⇒ a= √100 or a= -√100
⇒ a= 10 or a= -10

Final answer: a= 10 or a= -10~

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Wittaler [7]

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3 years ago

-2(6) + 3(5 - 4 . 2) =​

-2(6) + 3(5 - 4 . 2) =