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4 years ago

Which expression could you write to show how to multiply 9 x 856 using place value and expanded form

Mathematics

2 answers:

Charra [1.4K]4 years ago

6 0

9*800*50*6.... I think that's what you're asking :P

mote1985 [20]4 years ago

5 0

(9x800)+(9x50)+(9x6)=7704

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In order to solve the following system of equations by addition, which of the

Pavlova-9 [17]

Answer:

Multiply the top equation by -3 and the bottom equation by 2

Step-by-step explanation:

Given system of equations:

$\begin{cases}4x-2y=7\\3x-3y=15 \end{cases}$

To solve the given system of equations by addition, make one of the variables in both equations sum to zero. To do this, the chosen variable must have the same coefficient, but it should be negative in one equation and positive in the other, so that when the two equations are added together, the variable is eliminated.

To eliminate the variable y:

Multiply the top equation by -3 to make the coefficient of the y variable 6:

$\implies -3(4x-2y=7) \implies -12x+6y=-21$

Multiply the bottom equation by 2 to make the coefficient of the y variable -6:

$\implies 2(3x-3y=15) \implies 6x-6y=30$

Add the two equations together to eliminate y:

$\begin{array}{l r r}& -12x+6y= &-21\\+ & 6x-6y= & 30\\\cline{1-3}& -6x\phantom{))))))} = & 9\end{array}$

Solve for x:

$\implies -6x=9$

$\implies x=-\dfrac{9}{6}=-\dfrac{3}{2}$

Substitute the found value of x into one of the equations and solve for y:

$\implies 3\left(-\dfrac{3}{2}\right)-3y=15$

$\implies -\dfrac{9}{2}-3y=15$

$\implies -3y=\dfrac{39}{2}$

$\implies y=-\dfrac{39}{2 \cdot 3}$

$\implies y=-\dfrac{13}{2}$

Learn more about systems of equations here:

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2 years ago

Read 2 more answers

Please help I’ll give brainliest

kirza4 [7]

Answer:

Step-by-step explanation:

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3 years ago

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Please help me! Whoever gets the correct answer and explains it will get marked Brainliest!!

Helen [10]

1. The answer is 0.425

2. the answer is 0.425

3. the answer is 0.2125

8 0

3 years ago

How are dilations and functions related?

Anika [276]

If we dialate a function we are just changing what the graph looks like by a stretch or a compression, the function really doesn't change. If a function before the dilation, then it is a function after the dilation. The opposite is also true.

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3 years ago

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Shen is saving money to buy a game. The game costs $24 , and so far he has saved two-thirds of this cost. How much money has She

valentinak56 [21]

24 divided by 3 = 8

but thers two third so 8+8=16

shen has saved $16.00

Hope this helps!

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3 years ago