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kolbaska11 [484]
4 years ago
5

Solving linear systems of substitution

Mathematics
1 answer:
never [62]4 years ago
6 0
Example: 2x+2y=8 and 3y+2x=6
Okay so u first want to put on of the equations into a y= form. So let's use 3y+2x=6. Subtract 2x from both sides. 3y=6-2x divide by 3. Y= 6-2/3x or y= -2/3x + 6. Now just plug this new equation in for Y since "y=" into the other equation.
2x + 2(-2/3x + 6) = 8.
Then you would distribute the 2 into the parenthesis and simplify to solve for x.
After you solve for x, plug x into one of the original equations to find y.
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dolphi86 [110]

Answer:

Yes, Felix does have enough flour for 8 people. The initial recipe is able to feed only 4 people, needing 140 g of flour. If he needs to feed 8 people, he will need 280 g of flour. Felix has more than enough flour for 8 people.

Step-by-step explanation:

6 0
3 years ago
The radius of a circle is 8 inches. What is the circle's area?
sveta [45]

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200.96

Step-by-step explanation:

3.14 x (8x8) = 200.96

8 0
3 years ago
NEED ANSWER ASAP!!!!!!!
Daniel [21]

<em><u>Hi there (◕‿-)</u></em>

<em><u /></em>

Since both equations are equal to y, they must equal each other. So set them to equal each other.

28 + 0.05x = 25 + 0.07x      (✿ ♥‿♥)

Let's start by subtracting 25 from both sides!

3 + 0.05x = 0.07x (28-25=3, 25-25=0)

Now let's subtract 0.05 from both sides   O(≧▽≦)O

3 = 0.02x

We need this x by itself, so let's get rid of it. Do this by divide both sides by 0.02 ( ´_⊃`)

150 = x

So x = 150. Let's test this. Substitute 150 in for x in both equations! \(^○^)人(^○^)/

28+0.05(150) = 25+0.07(150)

28 + 7.5 = 25 + 10.5 (0.05*150=7.5, 0.07*150 = 10.5)

35.5 = 35.5

It works! (ノ◕ヮ◕)ノ*:・゚✧

So x = 150

6 0
3 years ago
Sofia makes and sells stuffed toys. She uses special fabric to cover a foam
valkas [14]

Answer:

384 square cm

Step-by-step explanation:

Fabric used will be equal to the total surface of the cubical block.

fabric \: used \\  = 6 {side}^{2}  \\ = 6 \times  {8}^{2}   \\  = 6 \times 64 \\  = 384 \:  {cm}^{2}  \\

8 0
3 years ago
How is the frequency table with intervals similar to the frequency tables and How is it different?​
stepan [7]
I would help but I’m not good with graphs
4 0
3 years ago
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