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4 years ago

9

Help me please. i'm confused on how to do elimination. This is algebra 2

2 answers:

kozerog [31]4 years ago

6 0

For the first problem, multiply the top equation by 2, so the resulting equation is 16x-12y = -40. You notice that if you add the bottom equation to the top equation, the X’s cancel out, resulting in the equation: 5y = -10, so y = -2. Plug -2 into y, and x = -4. For the second problem, you can multiply the top equation by 5 resulting in: -20y-55x = 30. The bottom equation can be multiplied by -2 resulting in: 20y+20x = -40. Notice that the y’s can cancel if the top and bottom equation are added together.

Mazyrski [523]4 years ago

4 0

Answer:

1. y = 8/11x + 10/11

2. y = -3/2x - 13/7

Step-by-step explanation:

1. -8x + 11y = 10

Add 8x to both sides

11y = 8x + 10

Divide both sides by 11

y = 8/11x + 10/11

2. 6 = -4y - 11x

20 = -10x - 10y

26 = -14y - 21x

Add 21x to both sides

-14y = 21x + 26

Divide both sides by -14 and simplify!

y = -3/2x - 13/7

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The sum of two numbers is 15. Using x to represent the smaller of the two numbers, translate "the sum of twice the smaller numbe

Paladinen [302]

Answer:

Step-by-step explanation: Let x be the smaller and y be the largest number.

Since x+y=13, we deduce y=13-x

Now, for the translation: "two more than the larger number" is y+2 , while "twice the smaller" is 2x

Their sum is y+2+2x

And since we know that y=13-x, we have y+2+2x=13-x+2+2=15+x

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1 year ago

workers on the simile line produce 4 x + 6 bolts each day which expression shows how many books they produced in 12 days

kakasveta [241]

4x+6 is produced each day.
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Solve and you get 48x+72.

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3 years ago

A cone-shaped pile of sawdust has a base diameter of 38 feet, and is 14 feet tall. Find the volume of the pile

Romashka-Z-Leto [24]

Answer:

Given: Diameter of cone = 38 feet and height of cone = 14 feet.

Volume of cone V with radius r is one-third the area of the base B times the height h.

i,e $V = \frac{1}{3} B \cdot h$ = $\frac{1}{3} \pi r^2h$ ......[1]

,where B = $\pi r^2$

First find the radius(r);

Using Diameter(D) = 2r

38 =2r

Divide both side by 2 we get;

$\frac{38}{2} =\frac{2r}{2}$

Simplify:

19 = r

or r =19 feet

Now, substitute the value of r = 19 feet and h = 14 feet in [1] [ Use value of $\pi = \frac{22}{7}$ ]

then, we have:

$V = \frac{1}{3} \pi r^2h = \frac{1}{3} \cdot \frac{22}{7} \cdot (19)^2 \cdot (14)$

or

V = $=\frac{1}{3}\cdot 22 \cdot 19 \cdot 19 \cdot 2 = \frac{22 \cdot 19 \cdot 19 \cdot 2}{3}$

or

V = $\frac{15884}{3} =5,294.66667$ ≈ 5,294.67 cubic feet.

therefore, the volume of pile is; ≈ 5,294.67 cubic feet.

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4 years ago

Booker owes 85 video games. He has 3 shelves to put the games on. Each shelf can hold 40 games. How many more video games Does h

Illusion [34]

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3 years ago